Abstract

Due to their good color rendering ability, white light-emitting diodes (WLEDs) with conventional phosphor and quantum dots (QDs) are gaining increasing attention. However, their optical and thermal performances are still limited especially for the ones with QDs-phosphor mixed nanocomposites. In this work, we propose a novel packaging scheme with horizontally layered QDs-phosphor nanocomposites to obtain an enhanced optical and thermal performance for WLEDs. Three different WLEDs, including QDs-phosphor mixed type, QDs-outside type, and QDs-inside type, were fabricated and compared. With 30 wt. % phosphor and 0.15 wt. % QDs nanocomposite, the QDs-outside type WLED shows a 21.8% increase of luminous efficiency, better color rendering ability, and a 27.0% decrease of the maximum nanocomposite temperature at 400 mA, compared with the mixed-type WLED. The reduced re-absorption between phosphor and QDs is responsible for the performance enhancement when they are separated. However, such reduced absorption can be traded off by the improper layered configuration, which is demonstrated by the worst performance of the QDs-inside type. Further, we demonstrate that the higher energy transfer efficiency between excitation light and nanocomposite in the QDs-outside type WLED is the key reason for its enhanced optical and thermal performance.

© 2018 Chinese Laser Press

Full Article  |  PDF Article
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References

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    [Crossref]
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    [Crossref]
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    [Crossref]
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    [Crossref]
  24. E. Kim, S. Unithrattil, I. S. Sohn, S. J. Kim, W. J. Chung, and W. B. Im, “Facile one-step fabrication of 2-layered and 4-quadrant type phosphor-in-glass plates for white LEDs: an insight into angle dependent luminescence,” Opt. Mater. Express 6, 804–814 (2016).
    [Crossref]
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    [Crossref]
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    [Crossref]
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    [Crossref]

2017 (8)

J. S. Li, Y. Tang, Z. T. Li, Z. Li, X. R. Ding, and L. S. Rao, “Investigation of the emission spectral properties of carbon dots in packaged LEDs using TiO2 nanoparticles,” IEEE J. Sel. Top. Quantum Electron. 23, 2000507 (2017).
[Crossref]

K. T. Shimizu, M. Böhmer, D. Estrada, S. Gangwal, S. Grabowski, H. Bechtel, E. Kang, K. J. Vampola, D. Chamberlin, O. B. Shchekin, and J. Bhardwaj, “Toward commercial realization of quantum dot based white light-emitting diodes for general illumination,” Photon. Res. 5, A1–A6 (2017).
[Crossref]

B. D. Mangum, T. S. Landes, B. R. Theobald, and J. N. Kurtin, “Exploring the bounds of narrow-band quantum dot downconverted LEDs,” Photon. Res. 5, A13–A22 (2017).
[Crossref]

H. Chen, J. He, and S. T. Wu, “Recent advances on quantum-dot-enhanced liquid-crystal displays,” IEEE J. Sel. Top. Quantum Electron. 23, 1900611 (2017).
[Crossref]

L. Rao, Y. Tang, Z. Li, X. Ding, G. Liang, H. Lu, C. Yan, K. Tang, and B. Yu, “Efficient synthesis of highly fluorescent carbon dots by microreactor method and their application in Fe3+ ion detection,” Mater. Sci. Eng. C 81, 213–223 (2017).
[Crossref]

J. He, H. Chen, H. Chen, Y. Wang, S. T. Wu, and Y. Dong, “Hybrid downconverters with green perovskite-polymer composite films for wide color gamut displays,” Opt. Express 25, 12915–12925 (2017).
[Crossref]

S. Abe, J. J. Joos, L. I. Martin, Z. Hens, and P. F. Smet, “Hybrid remote quantum dot/powder phosphor designs for display backlights,” Light Sci. Appl. 6, e16271 (2017).
[Crossref]

H. Zheng, X. Lei, T. Cheng, S. Liu, X. Zeng, and R. Sun, “Enhancing thermal dissipation of light-converting composite for quantum dot based white light-emitting diodes through electrospinning nanofibers,” Nanotechnology 28, 265204 (2017).
[Crossref]

2016 (9)

B. Xie, C. Wei, J. Hao, W. Dan, X. Yu, Y. Chen, R. Hu, W. Kai, and X. Luo, “Structural optimization for remote white light-emitting diodes with quantum dots and phosphor: packaging sequence matters,” Opt. Express 24, A1560–A1570 (2016).
[Crossref]

E. Kim, S. Unithrattil, I. S. Sohn, S. J. Kim, W. J. Chung, and W. B. Im, “Facile one-step fabrication of 2-layered and 4-quadrant type phosphor-in-glass plates for white LEDs: an insight into angle dependent luminescence,” Opt. Mater. Express 6, 804–814 (2016).
[Crossref]

S. P. Ying and H. Y. Chien, “Effect of reassembled remote phosphor geometry on the luminous efficiency and spectra of white light-emitting diodes with excellent color rendering property,” IEEE Trans. Electron Devices 63, 1117–1121 (2016).
[Crossref]

B. Xie, R. Hu, X. Yu, B. Shang, Y. Ma, and X. Luo, “Effect of packaging method on performance of light-emitting diodes with quantum dot phosphor,” IEEE Photon. Technol. Lett. 28, 1115–1118 (2016).
[Crossref]

X. Lei, H. Zheng, X. Guo, J. Chu, S. Liu, and P. Liu, “Optical performance enhancement of quantum dot-based light-emitting diodes through an optimized remote structure,” IEEE Trans. Electron Devices 63, 691–697 (2016).
[Crossref]

J. Y. Lien, C. J. Chen, R. K. Chiang, and S. L. Wang, “High color-rendering warm-white lamps using quantum-dot color conversion films,” Opt. Express 24, A1021–A1032 (2016).
[Crossref]

C. Li, K. Sun, W. Hu, W. Chen, W. Chen, X. Liu, X. Tang, Z. Zang, and Z. Hu, “Highly pure green light emission of perovskite CsPbBr3 quantum dots and their application for green light-emitting diodes,” Opt. Express 24, 15071–15078 (2016).
[Crossref]

S.-P. Ying and J.-Y. Shen, “Concentric ring phosphor geometry on the luminous efficiency of white-light-emitting diodes with excellent color rendering property,” Opt. Lett. 41, 1989–1992 (2016).
[Crossref]

S. Yu, Z. Li, G. Liang, Y. Tang, B. Yu, and K. Chen, “Angular color uniformity enhancement of white light-emitting diodes by remote micro-patterned phosphor film,” Photon. Res. 4, 140–145 (2016).
[Crossref]

2015 (2)

P. Pust, P. J. Schmidt, and W. Schnick, “A revolution in lighting,” Nat. Mater. 14, 454–458 (2015).
[Crossref]

L. Yin, Y. Bai, J. Zhou, J. Cao, X. Sun, and J. Zhang, “The thermal stability performances of the color rendering index of white light emitting diodes with the red quantum dots encapsulation,” Opt. Mater. 42, 187–192 (2015).
[Crossref]

2014 (3)

Z. Luo, D. Xu, and S. T. Wu, “Emerging quantum-dots-enhanced LCDs,” J. Disp. Technol. 10, 526–539 (2014).
[Crossref]

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, and R. S. Liu, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[Crossref]

J. S. Lee, P. Arunkumar, S. Kim, I. J. Lee, H. Lee, and W. B. Im, “Smart design to resolve spectral overlapping of phosphor-in-glass for high-powered remote-type white light-emitting devices,” Opt. Lett. 39, 762–765 (2014).
[Crossref]

2013 (2)

J.-H. Kim, W.-S. Song, and H. Yang, “Color-converting bilayered composite plate of quantum-dot-polymer for high-color rendering white light-emitting diode,” Opt. Lett. 38, 2885–2888 (2013).
[Crossref]

Z. T. Li, Y. Tang, Z. Y. Liu, Y. E. Tan, and B. M. Zhu, “Detailed study on pulse-sprayed conformal phosphor configurations for LEDs,” J. Disp. Technol. 9, 433–440 (2013).
[Crossref]

2012 (1)

H. Zhong, Z. Bai, and B. Zou, “Tuning the luminescence properties of colloidal I-III-VI semiconductor nanocrystals for optoelectronics and biotechnology applications,” J. Phys. Chem. Lett. 3, 3167–3175 (2012).
[Crossref]

2011 (1)

Y. W. Ju, K. Kim, S. Jeong, and C. S. Han, “Enhanced photoluminescence of layered quantum dot-phosphor nanocomposites as converting materials for light emitting diodes,” J. Phys. Chem. C 115, 20945–20952 (2011).
[Crossref]

2007 (1)

X. Piao, K. Machida, T. Horikawa, H. Hanzawa, A. Y. Shimomura, and N. Kijima, “Preparation of CaAlSiN3:Eu2+ phosphors by the self-propagating high-temperature synthesis and their luminescent properties,” Chem. Mater. 19, 4592–4599 (2007).
[Crossref]

Abe, S.

S. Abe, J. J. Joos, L. I. Martin, Z. Hens, and P. F. Smet, “Hybrid remote quantum dot/powder phosphor designs for display backlights,” Light Sci. Appl. 6, e16271 (2017).
[Crossref]

Arunkumar, P.

Bai, Y.

L. Yin, Y. Bai, J. Zhou, J. Cao, X. Sun, and J. Zhang, “The thermal stability performances of the color rendering index of white light emitting diodes with the red quantum dots encapsulation,” Opt. Mater. 42, 187–192 (2015).
[Crossref]

Bai, Z.

H. Zhong, Z. Bai, and B. Zou, “Tuning the luminescence properties of colloidal I-III-VI semiconductor nanocrystals for optoelectronics and biotechnology applications,” J. Phys. Chem. Lett. 3, 3167–3175 (2012).
[Crossref]

Bechtel, H.

Bhardwaj, J.

Böhmer, M.

Cao, J.

L. Yin, Y. Bai, J. Zhou, J. Cao, X. Sun, and J. Zhang, “The thermal stability performances of the color rendering index of white light emitting diodes with the red quantum dots encapsulation,” Opt. Mater. 42, 187–192 (2015).
[Crossref]

Cao, Y.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, and R. S. Liu, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[Crossref]

Chamberlin, D.

Chen, C. J.

Chen, H.

Chen, K.

Chen, W.

Chen, Y.

Cheng, T.

H. Zheng, X. Lei, T. Cheng, S. Liu, X. Zeng, and R. Sun, “Enhancing thermal dissipation of light-converting composite for quantum dot based white light-emitting diodes through electrospinning nanofibers,” Nanotechnology 28, 265204 (2017).
[Crossref]

Chiang, R. K.

Chien, H. Y.

S. P. Ying and H. Y. Chien, “Effect of reassembled remote phosphor geometry on the luminous efficiency and spectra of white light-emitting diodes with excellent color rendering property,” IEEE Trans. Electron Devices 63, 1117–1121 (2016).
[Crossref]

Chu, J.

X. Lei, H. Zheng, X. Guo, J. Chu, S. Liu, and P. Liu, “Optical performance enhancement of quantum dot-based light-emitting diodes through an optimized remote structure,” IEEE Trans. Electron Devices 63, 691–697 (2016).
[Crossref]

Chung, W. J.

Dan, W.

Ding, X.

L. Rao, Y. Tang, Z. Li, X. Ding, G. Liang, H. Lu, C. Yan, K. Tang, and B. Yu, “Efficient synthesis of highly fluorescent carbon dots by microreactor method and their application in Fe3+ ion detection,” Mater. Sci. Eng. C 81, 213–223 (2017).
[Crossref]

Ding, X. R.

J. S. Li, Y. Tang, Z. T. Li, Z. Li, X. R. Ding, and L. S. Rao, “Investigation of the emission spectral properties of carbon dots in packaged LEDs using TiO2 nanoparticles,” IEEE J. Sel. Top. Quantum Electron. 23, 2000507 (2017).
[Crossref]

Dong, Y.

Estrada, D.

Gangwal, S.

Grabowski, S.

Guo, X.

X. Lei, H. Zheng, X. Guo, J. Chu, S. Liu, and P. Liu, “Optical performance enhancement of quantum dot-based light-emitting diodes through an optimized remote structure,” IEEE Trans. Electron Devices 63, 691–697 (2016).
[Crossref]

Han, C. S.

Y. W. Ju, K. Kim, S. Jeong, and C. S. Han, “Enhanced photoluminescence of layered quantum dot-phosphor nanocomposites as converting materials for light emitting diodes,” J. Phys. Chem. C 115, 20945–20952 (2011).
[Crossref]

Hanzawa, H.

X. Piao, K. Machida, T. Horikawa, H. Hanzawa, A. Y. Shimomura, and N. Kijima, “Preparation of CaAlSiN3:Eu2+ phosphors by the self-propagating high-temperature synthesis and their luminescent properties,” Chem. Mater. 19, 4592–4599 (2007).
[Crossref]

Hao, J.

He, J.

H. Chen, J. He, and S. T. Wu, “Recent advances on quantum-dot-enhanced liquid-crystal displays,” IEEE J. Sel. Top. Quantum Electron. 23, 1900611 (2017).
[Crossref]

J. He, H. Chen, H. Chen, Y. Wang, S. T. Wu, and Y. Dong, “Hybrid downconverters with green perovskite-polymer composite films for wide color gamut displays,” Opt. Express 25, 12915–12925 (2017).
[Crossref]

Hens, Z.

S. Abe, J. J. Joos, L. I. Martin, Z. Hens, and P. F. Smet, “Hybrid remote quantum dot/powder phosphor designs for display backlights,” Light Sci. Appl. 6, e16271 (2017).
[Crossref]

Horikawa, T.

X. Piao, K. Machida, T. Horikawa, H. Hanzawa, A. Y. Shimomura, and N. Kijima, “Preparation of CaAlSiN3:Eu2+ phosphors by the self-propagating high-temperature synthesis and their luminescent properties,” Chem. Mater. 19, 4592–4599 (2007).
[Crossref]

Hu, R.

B. Xie, C. Wei, J. Hao, W. Dan, X. Yu, Y. Chen, R. Hu, W. Kai, and X. Luo, “Structural optimization for remote white light-emitting diodes with quantum dots and phosphor: packaging sequence matters,” Opt. Express 24, A1560–A1570 (2016).
[Crossref]

B. Xie, R. Hu, X. Yu, B. Shang, Y. Ma, and X. Luo, “Effect of packaging method on performance of light-emitting diodes with quantum dot phosphor,” IEEE Photon. Technol. Lett. 28, 1115–1118 (2016).
[Crossref]

Hu, W.

Hu, Z.

Im, W. B.

Jeong, S.

Y. W. Ju, K. Kim, S. Jeong, and C. S. Han, “Enhanced photoluminescence of layered quantum dot-phosphor nanocomposites as converting materials for light emitting diodes,” J. Phys. Chem. C 115, 20945–20952 (2011).
[Crossref]

Joos, J. J.

S. Abe, J. J. Joos, L. I. Martin, Z. Hens, and P. F. Smet, “Hybrid remote quantum dot/powder phosphor designs for display backlights,” Light Sci. Appl. 6, e16271 (2017).
[Crossref]

Ju, Y. W.

Y. W. Ju, K. Kim, S. Jeong, and C. S. Han, “Enhanced photoluminescence of layered quantum dot-phosphor nanocomposites as converting materials for light emitting diodes,” J. Phys. Chem. C 115, 20945–20952 (2011).
[Crossref]

Kai, W.

Kang, E.

Kijima, N.

X. Piao, K. Machida, T. Horikawa, H. Hanzawa, A. Y. Shimomura, and N. Kijima, “Preparation of CaAlSiN3:Eu2+ phosphors by the self-propagating high-temperature synthesis and their luminescent properties,” Chem. Mater. 19, 4592–4599 (2007).
[Crossref]

Kim, E.

Kim, J.-H.

Kim, K.

Y. W. Ju, K. Kim, S. Jeong, and C. S. Han, “Enhanced photoluminescence of layered quantum dot-phosphor nanocomposites as converting materials for light emitting diodes,” J. Phys. Chem. C 115, 20945–20952 (2011).
[Crossref]

Kim, S.

Kim, S. J.

Kong, J.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, and R. S. Liu, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[Crossref]

Kurtin, J. N.

Landes, T. S.

Lee, H.

Lee, I. J.

Lee, J. S.

Lei, X.

H. Zheng, X. Lei, T. Cheng, S. Liu, X. Zeng, and R. Sun, “Enhancing thermal dissipation of light-converting composite for quantum dot based white light-emitting diodes through electrospinning nanofibers,” Nanotechnology 28, 265204 (2017).
[Crossref]

X. Lei, H. Zheng, X. Guo, J. Chu, S. Liu, and P. Liu, “Optical performance enhancement of quantum dot-based light-emitting diodes through an optimized remote structure,” IEEE Trans. Electron Devices 63, 691–697 (2016).
[Crossref]

Li, C.

Li, J. S.

J. S. Li, Y. Tang, Z. T. Li, Z. Li, X. R. Ding, and L. S. Rao, “Investigation of the emission spectral properties of carbon dots in packaged LEDs using TiO2 nanoparticles,” IEEE J. Sel. Top. Quantum Electron. 23, 2000507 (2017).
[Crossref]

Li, Z.

J. S. Li, Y. Tang, Z. T. Li, Z. Li, X. R. Ding, and L. S. Rao, “Investigation of the emission spectral properties of carbon dots in packaged LEDs using TiO2 nanoparticles,” IEEE J. Sel. Top. Quantum Electron. 23, 2000507 (2017).
[Crossref]

L. Rao, Y. Tang, Z. Li, X. Ding, G. Liang, H. Lu, C. Yan, K. Tang, and B. Yu, “Efficient synthesis of highly fluorescent carbon dots by microreactor method and their application in Fe3+ ion detection,” Mater. Sci. Eng. C 81, 213–223 (2017).
[Crossref]

S. Yu, Z. Li, G. Liang, Y. Tang, B. Yu, and K. Chen, “Angular color uniformity enhancement of white light-emitting diodes by remote micro-patterned phosphor film,” Photon. Res. 4, 140–145 (2016).
[Crossref]

Li, Z. T.

J. S. Li, Y. Tang, Z. T. Li, Z. Li, X. R. Ding, and L. S. Rao, “Investigation of the emission spectral properties of carbon dots in packaged LEDs using TiO2 nanoparticles,” IEEE J. Sel. Top. Quantum Electron. 23, 2000507 (2017).
[Crossref]

Z. T. Li, Y. Tang, Z. Y. Liu, Y. E. Tan, and B. M. Zhu, “Detailed study on pulse-sprayed conformal phosphor configurations for LEDs,” J. Disp. Technol. 9, 433–440 (2013).
[Crossref]

Liang, G.

L. Rao, Y. Tang, Z. Li, X. Ding, G. Liang, H. Lu, C. Yan, K. Tang, and B. Yu, “Efficient synthesis of highly fluorescent carbon dots by microreactor method and their application in Fe3+ ion detection,” Mater. Sci. Eng. C 81, 213–223 (2017).
[Crossref]

S. Yu, Z. Li, G. Liang, Y. Tang, B. Yu, and K. Chen, “Angular color uniformity enhancement of white light-emitting diodes by remote micro-patterned phosphor film,” Photon. Res. 4, 140–145 (2016).
[Crossref]

Lien, J. Y.

Lin, C. C.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, and R. S. Liu, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[Crossref]

Liu, P.

X. Lei, H. Zheng, X. Guo, J. Chu, S. Liu, and P. Liu, “Optical performance enhancement of quantum dot-based light-emitting diodes through an optimized remote structure,” IEEE Trans. Electron Devices 63, 691–697 (2016).
[Crossref]

Liu, R. S.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, and R. S. Liu, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[Crossref]

Liu, S.

H. Zheng, X. Lei, T. Cheng, S. Liu, X. Zeng, and R. Sun, “Enhancing thermal dissipation of light-converting composite for quantum dot based white light-emitting diodes through electrospinning nanofibers,” Nanotechnology 28, 265204 (2017).
[Crossref]

X. Lei, H. Zheng, X. Guo, J. Chu, S. Liu, and P. Liu, “Optical performance enhancement of quantum dot-based light-emitting diodes through an optimized remote structure,” IEEE Trans. Electron Devices 63, 691–697 (2016).
[Crossref]

Liu, X.

Liu, Y.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, and R. S. Liu, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[Crossref]

Liu, Z.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, and R. S. Liu, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[Crossref]

Liu, Z. Y.

Z. T. Li, Y. Tang, Z. Y. Liu, Y. E. Tan, and B. M. Zhu, “Detailed study on pulse-sprayed conformal phosphor configurations for LEDs,” J. Disp. Technol. 9, 433–440 (2013).
[Crossref]

Lu, H.

L. Rao, Y. Tang, Z. Li, X. Ding, G. Liang, H. Lu, C. Yan, K. Tang, and B. Yu, “Efficient synthesis of highly fluorescent carbon dots by microreactor method and their application in Fe3+ ion detection,” Mater. Sci. Eng. C 81, 213–223 (2017).
[Crossref]

Luo, W.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, and R. S. Liu, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[Crossref]

Luo, X.

B. Xie, R. Hu, X. Yu, B. Shang, Y. Ma, and X. Luo, “Effect of packaging method on performance of light-emitting diodes with quantum dot phosphor,” IEEE Photon. Technol. Lett. 28, 1115–1118 (2016).
[Crossref]

B. Xie, C. Wei, J. Hao, W. Dan, X. Yu, Y. Chen, R. Hu, W. Kai, and X. Luo, “Structural optimization for remote white light-emitting diodes with quantum dots and phosphor: packaging sequence matters,” Opt. Express 24, A1560–A1570 (2016).
[Crossref]

Luo, Z.

Z. Luo, D. Xu, and S. T. Wu, “Emerging quantum-dots-enhanced LCDs,” J. Disp. Technol. 10, 526–539 (2014).
[Crossref]

Ma, E.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, and R. S. Liu, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[Crossref]

Ma, Y.

B. Xie, R. Hu, X. Yu, B. Shang, Y. Ma, and X. Luo, “Effect of packaging method on performance of light-emitting diodes with quantum dot phosphor,” IEEE Photon. Technol. Lett. 28, 1115–1118 (2016).
[Crossref]

Machida, K.

X. Piao, K. Machida, T. Horikawa, H. Hanzawa, A. Y. Shimomura, and N. Kijima, “Preparation of CaAlSiN3:Eu2+ phosphors by the self-propagating high-temperature synthesis and their luminescent properties,” Chem. Mater. 19, 4592–4599 (2007).
[Crossref]

Mangum, B. D.

Martin, L. I.

S. Abe, J. J. Joos, L. I. Martin, Z. Hens, and P. F. Smet, “Hybrid remote quantum dot/powder phosphor designs for display backlights,” Light Sci. Appl. 6, e16271 (2017).
[Crossref]

Piao, X.

X. Piao, K. Machida, T. Horikawa, H. Hanzawa, A. Y. Shimomura, and N. Kijima, “Preparation of CaAlSiN3:Eu2+ phosphors by the self-propagating high-temperature synthesis and their luminescent properties,” Chem. Mater. 19, 4592–4599 (2007).
[Crossref]

Pust, P.

P. Pust, P. J. Schmidt, and W. Schnick, “A revolution in lighting,” Nat. Mater. 14, 454–458 (2015).
[Crossref]

Rao, L.

L. Rao, Y. Tang, Z. Li, X. Ding, G. Liang, H. Lu, C. Yan, K. Tang, and B. Yu, “Efficient synthesis of highly fluorescent carbon dots by microreactor method and their application in Fe3+ ion detection,” Mater. Sci. Eng. C 81, 213–223 (2017).
[Crossref]

Rao, L. S.

J. S. Li, Y. Tang, Z. T. Li, Z. Li, X. R. Ding, and L. S. Rao, “Investigation of the emission spectral properties of carbon dots in packaged LEDs using TiO2 nanoparticles,” IEEE J. Sel. Top. Quantum Electron. 23, 2000507 (2017).
[Crossref]

Schmidt, P. J.

P. Pust, P. J. Schmidt, and W. Schnick, “A revolution in lighting,” Nat. Mater. 14, 454–458 (2015).
[Crossref]

Schnick, W.

P. Pust, P. J. Schmidt, and W. Schnick, “A revolution in lighting,” Nat. Mater. 14, 454–458 (2015).
[Crossref]

Shang, B.

B. Xie, R. Hu, X. Yu, B. Shang, Y. Ma, and X. Luo, “Effect of packaging method on performance of light-emitting diodes with quantum dot phosphor,” IEEE Photon. Technol. Lett. 28, 1115–1118 (2016).
[Crossref]

Shchekin, O. B.

Shen, J.-Y.

Shimizu, K. T.

Shimomura, A. Y.

X. Piao, K. Machida, T. Horikawa, H. Hanzawa, A. Y. Shimomura, and N. Kijima, “Preparation of CaAlSiN3:Eu2+ phosphors by the self-propagating high-temperature synthesis and their luminescent properties,” Chem. Mater. 19, 4592–4599 (2007).
[Crossref]

Shu, S.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, and R. S. Liu, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[Crossref]

Smet, P. F.

S. Abe, J. J. Joos, L. I. Martin, Z. Hens, and P. F. Smet, “Hybrid remote quantum dot/powder phosphor designs for display backlights,” Light Sci. Appl. 6, e16271 (2017).
[Crossref]

Sohn, I. S.

Song, W.-S.

Sun, K.

Sun, R.

H. Zheng, X. Lei, T. Cheng, S. Liu, X. Zeng, and R. Sun, “Enhancing thermal dissipation of light-converting composite for quantum dot based white light-emitting diodes through electrospinning nanofibers,” Nanotechnology 28, 265204 (2017).
[Crossref]

Sun, X.

L. Yin, Y. Bai, J. Zhou, J. Cao, X. Sun, and J. Zhang, “The thermal stability performances of the color rendering index of white light emitting diodes with the red quantum dots encapsulation,” Opt. Mater. 42, 187–192 (2015).
[Crossref]

Tan, Y. E.

Z. T. Li, Y. Tang, Z. Y. Liu, Y. E. Tan, and B. M. Zhu, “Detailed study on pulse-sprayed conformal phosphor configurations for LEDs,” J. Disp. Technol. 9, 433–440 (2013).
[Crossref]

Tang, K.

L. Rao, Y. Tang, Z. Li, X. Ding, G. Liang, H. Lu, C. Yan, K. Tang, and B. Yu, “Efficient synthesis of highly fluorescent carbon dots by microreactor method and their application in Fe3+ ion detection,” Mater. Sci. Eng. C 81, 213–223 (2017).
[Crossref]

Tang, X.

Tang, Y.

L. Rao, Y. Tang, Z. Li, X. Ding, G. Liang, H. Lu, C. Yan, K. Tang, and B. Yu, “Efficient synthesis of highly fluorescent carbon dots by microreactor method and their application in Fe3+ ion detection,” Mater. Sci. Eng. C 81, 213–223 (2017).
[Crossref]

J. S. Li, Y. Tang, Z. T. Li, Z. Li, X. R. Ding, and L. S. Rao, “Investigation of the emission spectral properties of carbon dots in packaged LEDs using TiO2 nanoparticles,” IEEE J. Sel. Top. Quantum Electron. 23, 2000507 (2017).
[Crossref]

S. Yu, Z. Li, G. Liang, Y. Tang, B. Yu, and K. Chen, “Angular color uniformity enhancement of white light-emitting diodes by remote micro-patterned phosphor film,” Photon. Res. 4, 140–145 (2016).
[Crossref]

Z. T. Li, Y. Tang, Z. Y. Liu, Y. E. Tan, and B. M. Zhu, “Detailed study on pulse-sprayed conformal phosphor configurations for LEDs,” J. Disp. Technol. 9, 433–440 (2013).
[Crossref]

Theobald, B. R.

Unithrattil, S.

Vampola, K. J.

Wang, S. L.

Wang, Y.

Wei, C.

Wu, S. T.

H. Chen, J. He, and S. T. Wu, “Recent advances on quantum-dot-enhanced liquid-crystal displays,” IEEE J. Sel. Top. Quantum Electron. 23, 1900611 (2017).
[Crossref]

J. He, H. Chen, H. Chen, Y. Wang, S. T. Wu, and Y. Dong, “Hybrid downconverters with green perovskite-polymer composite films for wide color gamut displays,” Opt. Express 25, 12915–12925 (2017).
[Crossref]

Z. Luo, D. Xu, and S. T. Wu, “Emerging quantum-dots-enhanced LCDs,” J. Disp. Technol. 10, 526–539 (2014).
[Crossref]

Xie, B.

B. Xie, C. Wei, J. Hao, W. Dan, X. Yu, Y. Chen, R. Hu, W. Kai, and X. Luo, “Structural optimization for remote white light-emitting diodes with quantum dots and phosphor: packaging sequence matters,” Opt. Express 24, A1560–A1570 (2016).
[Crossref]

B. Xie, R. Hu, X. Yu, B. Shang, Y. Ma, and X. Luo, “Effect of packaging method on performance of light-emitting diodes with quantum dot phosphor,” IEEE Photon. Technol. Lett. 28, 1115–1118 (2016).
[Crossref]

Xu, D.

Z. Luo, D. Xu, and S. T. Wu, “Emerging quantum-dots-enhanced LCDs,” J. Disp. Technol. 10, 526–539 (2014).
[Crossref]

Yan, C.

L. Rao, Y. Tang, Z. Li, X. Ding, G. Liang, H. Lu, C. Yan, K. Tang, and B. Yu, “Efficient synthesis of highly fluorescent carbon dots by microreactor method and their application in Fe3+ ion detection,” Mater. Sci. Eng. C 81, 213–223 (2017).
[Crossref]

Yang, H.

Yin, L.

L. Yin, Y. Bai, J. Zhou, J. Cao, X. Sun, and J. Zhang, “The thermal stability performances of the color rendering index of white light emitting diodes with the red quantum dots encapsulation,” Opt. Mater. 42, 187–192 (2015).
[Crossref]

Ying, S. P.

S. P. Ying and H. Y. Chien, “Effect of reassembled remote phosphor geometry on the luminous efficiency and spectra of white light-emitting diodes with excellent color rendering property,” IEEE Trans. Electron Devices 63, 1117–1121 (2016).
[Crossref]

Ying, S.-P.

Yu, B.

L. Rao, Y. Tang, Z. Li, X. Ding, G. Liang, H. Lu, C. Yan, K. Tang, and B. Yu, “Efficient synthesis of highly fluorescent carbon dots by microreactor method and their application in Fe3+ ion detection,” Mater. Sci. Eng. C 81, 213–223 (2017).
[Crossref]

S. Yu, Z. Li, G. Liang, Y. Tang, B. Yu, and K. Chen, “Angular color uniformity enhancement of white light-emitting diodes by remote micro-patterned phosphor film,” Photon. Res. 4, 140–145 (2016).
[Crossref]

Yu, S.

Yu, X.

B. Xie, C. Wei, J. Hao, W. Dan, X. Yu, Y. Chen, R. Hu, W. Kai, and X. Luo, “Structural optimization for remote white light-emitting diodes with quantum dots and phosphor: packaging sequence matters,” Opt. Express 24, A1560–A1570 (2016).
[Crossref]

B. Xie, R. Hu, X. Yu, B. Shang, Y. Ma, and X. Luo, “Effect of packaging method on performance of light-emitting diodes with quantum dot phosphor,” IEEE Photon. Technol. Lett. 28, 1115–1118 (2016).
[Crossref]

Zang, Z.

Zeng, X.

H. Zheng, X. Lei, T. Cheng, S. Liu, X. Zeng, and R. Sun, “Enhancing thermal dissipation of light-converting composite for quantum dot based white light-emitting diodes through electrospinning nanofibers,” Nanotechnology 28, 265204 (2017).
[Crossref]

Zhang, J.

L. Yin, Y. Bai, J. Zhou, J. Cao, X. Sun, and J. Zhang, “The thermal stability performances of the color rendering index of white light emitting diodes with the red quantum dots encapsulation,” Opt. Mater. 42, 187–192 (2015).
[Crossref]

Zheng, H.

H. Zheng, X. Lei, T. Cheng, S. Liu, X. Zeng, and R. Sun, “Enhancing thermal dissipation of light-converting composite for quantum dot based white light-emitting diodes through electrospinning nanofibers,” Nanotechnology 28, 265204 (2017).
[Crossref]

X. Lei, H. Zheng, X. Guo, J. Chu, S. Liu, and P. Liu, “Optical performance enhancement of quantum dot-based light-emitting diodes through an optimized remote structure,” IEEE Trans. Electron Devices 63, 691–697 (2016).
[Crossref]

Zhong, H.

H. Zhong, Z. Bai, and B. Zou, “Tuning the luminescence properties of colloidal I-III-VI semiconductor nanocrystals for optoelectronics and biotechnology applications,” J. Phys. Chem. Lett. 3, 3167–3175 (2012).
[Crossref]

Zhou, J.

L. Yin, Y. Bai, J. Zhou, J. Cao, X. Sun, and J. Zhang, “The thermal stability performances of the color rendering index of white light emitting diodes with the red quantum dots encapsulation,” Opt. Mater. 42, 187–192 (2015).
[Crossref]

Zhu, B. M.

Z. T. Li, Y. Tang, Z. Y. Liu, Y. E. Tan, and B. M. Zhu, “Detailed study on pulse-sprayed conformal phosphor configurations for LEDs,” J. Disp. Technol. 9, 433–440 (2013).
[Crossref]

Zhu, H.

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, and R. S. Liu, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[Crossref]

Zou, B.

H. Zhong, Z. Bai, and B. Zou, “Tuning the luminescence properties of colloidal I-III-VI semiconductor nanocrystals for optoelectronics and biotechnology applications,” J. Phys. Chem. Lett. 3, 3167–3175 (2012).
[Crossref]

Chem. Mater. (1)

X. Piao, K. Machida, T. Horikawa, H. Hanzawa, A. Y. Shimomura, and N. Kijima, “Preparation of CaAlSiN3:Eu2+ phosphors by the self-propagating high-temperature synthesis and their luminescent properties,” Chem. Mater. 19, 4592–4599 (2007).
[Crossref]

IEEE J. Sel. Top. Quantum Electron. (2)

J. S. Li, Y. Tang, Z. T. Li, Z. Li, X. R. Ding, and L. S. Rao, “Investigation of the emission spectral properties of carbon dots in packaged LEDs using TiO2 nanoparticles,” IEEE J. Sel. Top. Quantum Electron. 23, 2000507 (2017).
[Crossref]

H. Chen, J. He, and S. T. Wu, “Recent advances on quantum-dot-enhanced liquid-crystal displays,” IEEE J. Sel. Top. Quantum Electron. 23, 1900611 (2017).
[Crossref]

IEEE Photon. Technol. Lett. (1)

B. Xie, R. Hu, X. Yu, B. Shang, Y. Ma, and X. Luo, “Effect of packaging method on performance of light-emitting diodes with quantum dot phosphor,” IEEE Photon. Technol. Lett. 28, 1115–1118 (2016).
[Crossref]

IEEE Trans. Electron Devices (2)

X. Lei, H. Zheng, X. Guo, J. Chu, S. Liu, and P. Liu, “Optical performance enhancement of quantum dot-based light-emitting diodes through an optimized remote structure,” IEEE Trans. Electron Devices 63, 691–697 (2016).
[Crossref]

S. P. Ying and H. Y. Chien, “Effect of reassembled remote phosphor geometry on the luminous efficiency and spectra of white light-emitting diodes with excellent color rendering property,” IEEE Trans. Electron Devices 63, 1117–1121 (2016).
[Crossref]

J. Disp. Technol. (2)

Z. T. Li, Y. Tang, Z. Y. Liu, Y. E. Tan, and B. M. Zhu, “Detailed study on pulse-sprayed conformal phosphor configurations for LEDs,” J. Disp. Technol. 9, 433–440 (2013).
[Crossref]

Z. Luo, D. Xu, and S. T. Wu, “Emerging quantum-dots-enhanced LCDs,” J. Disp. Technol. 10, 526–539 (2014).
[Crossref]

J. Phys. Chem. C (1)

Y. W. Ju, K. Kim, S. Jeong, and C. S. Han, “Enhanced photoluminescence of layered quantum dot-phosphor nanocomposites as converting materials for light emitting diodes,” J. Phys. Chem. C 115, 20945–20952 (2011).
[Crossref]

J. Phys. Chem. Lett. (1)

H. Zhong, Z. Bai, and B. Zou, “Tuning the luminescence properties of colloidal I-III-VI semiconductor nanocrystals for optoelectronics and biotechnology applications,” J. Phys. Chem. Lett. 3, 3167–3175 (2012).
[Crossref]

Light Sci. Appl. (1)

S. Abe, J. J. Joos, L. I. Martin, Z. Hens, and P. F. Smet, “Hybrid remote quantum dot/powder phosphor designs for display backlights,” Light Sci. Appl. 6, e16271 (2017).
[Crossref]

Mater. Sci. Eng. C (1)

L. Rao, Y. Tang, Z. Li, X. Ding, G. Liang, H. Lu, C. Yan, K. Tang, and B. Yu, “Efficient synthesis of highly fluorescent carbon dots by microreactor method and their application in Fe3+ ion detection,” Mater. Sci. Eng. C 81, 213–223 (2017).
[Crossref]

Nanotechnology (1)

H. Zheng, X. Lei, T. Cheng, S. Liu, X. Zeng, and R. Sun, “Enhancing thermal dissipation of light-converting composite for quantum dot based white light-emitting diodes through electrospinning nanofibers,” Nanotechnology 28, 265204 (2017).
[Crossref]

Nat. Commun. (1)

H. Zhu, C. C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, and R. S. Liu, “Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes,” Nat. Commun. 5, 4312 (2014).
[Crossref]

Nat. Mater. (1)

P. Pust, P. J. Schmidt, and W. Schnick, “A revolution in lighting,” Nat. Mater. 14, 454–458 (2015).
[Crossref]

Opt. Express (4)

Opt. Lett. (3)

Opt. Mater. (1)

L. Yin, Y. Bai, J. Zhou, J. Cao, X. Sun, and J. Zhang, “The thermal stability performances of the color rendering index of white light emitting diodes with the red quantum dots encapsulation,” Opt. Mater. 42, 187–192 (2015).
[Crossref]

Opt. Mater. Express (1)

Photon. Res. (3)

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Figures (10)

Fig. 1.
Fig. 1. (a) Diagram of WLED device with QDs phosphor nanocomposite. (b) Mixed type. (c) QDs-outside type. (d) QDs-inside type.
Fig. 2.
Fig. 2. Fabrication process of horizontally layered quantum dots phosphor nanocomposite (QDs-outside type): (a) molds and TIR lens, (b) parts assembling, (c) phosphor coating, (d) steel mold removing, (e) QDs coating, and (f) Teflon mold removing.
Fig. 3.
Fig. 3. (a) LED device without QDs-phosphor nanocomposite. (b)–(d) LED devices with different QDs-phosphor nanocomposites: mixed type; QDs-outside type; QDs-inside type.
Fig. 4.
Fig. 4. (a) High-resolution TEM images of the CdSe/ZnS core-shell QDs. Inset: photograph of QDs solution under UV light exposure. Scale bars: 30 nm, 5 nm. (b) Excitation and PL spectra of YAG phosphor and QDs.
Fig. 5.
Fig. 5. Optical power, LE and LER of the three WLED devices at varying current from 100 mA to 700 mA.
Fig. 6.
Fig. 6. (a) Normalized emission spectra of three WLED devices (mixed type, QDs-outside type, and QDs-inside type) at 400 mA. Inset shows the corresponding optical characteristics. (b) Their separated emission power (blue emission, YAG emission, and QDs emission).
Fig. 7.
Fig. 7. CIE color coordinates in the 1931 chromaticity diagram of mixed type, QDs-outside type, and QDs-inside type WLEDs and corresponding photo images at an operating current of 400 mA.
Fig. 8.
Fig. 8. Normalized emission spectra of yellow LED and yellow LED with red QDs. Inset: diagram of measuring setup.
Fig. 9.
Fig. 9. Normalized light intensity distribution of LED devices without/with lens. Inset: light energy proportion of central region and peripheral region.
Fig. 10.
Fig. 10. (a) Photograph of the three lighting WLED devices. (b) Temperature fields of three WLED devices measured by infrared video camera under driving current of 400 mA.

Tables (1)

Tables Icon

Table 1. Optical and Thermal Characteristics of the Three WLED Devices at 400 mA

Equations (5)

Equations on this page are rendered with MathJax. Learn more.

LE=λ1λ2V(λ)S(λ)dλIV,
LER=683×λ1λ2V(λ)S(λ)dλλ1λ2S(λ)dλ,
PY_em=βλ1λ2SY_ref(λ)dλ,
PR_em=λ1λ2S(λ)dλPY_em,
CCE=PY_em+PR_emPB_exPB_em,

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