Abstract

We have investigated the fluorescent and hosting properties of a novel star-shaped material (SSM) containing carbazole/arylamine backbone. Using SSM as an emitter, we have fabricated a near ultraviolet-emitting electroluminescent device with a peak emission at $\lambda _{\rm peak} =408~{{nm}}$ and achieved a maximum external quantum efficiency of 2.56%. We have also demonstrated that SSM can be employed as an effective hosting material of high-efficiency blue organic light-emitting diode, in which the maximum current and power efficiencies reached 10.37 cd/A and 8.69 lm/W, respectively. We have also found that the side-band emission of blue $p$-bis($p-N$, $N$-diphenyl-amino-styryl) benzene electroluminophore could be completely suppressed with the aid of SSM being hosting matrix. Hence, SSM-based blue device has a higher color-purity than 4,4'-bis(9-carbazolyl)biphenyl-based one, of which the y-value of color coordinates and the full-width half-maximum decreased from 0.45 to 0.36, and from 62 to 37 nm, respectively.

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  1. S. W. Wen, M.-T. Lee, C.-H. Chen, "Recent development of blue fluorescent OLED materials and devices," J. Display Technol. 1, 90-99 (2005).
  2. S.-J. Su, E. Gonmori, H. Sasabe, J. Kido, "Highly efficient organic blue-and white-light-emitting devices having a carrier and exciton-confining structure for reduced efficiency roll-off," Adv. Mater. 20, 4189-4194 (2008).
  3. S.-J. Yeh, M.-F. Wu, C.-T. Chen, Y.-H. Song, Y. Chi, M.-H. Ho, S.-F. Hsu, C. H. Chen, "New dopant and host materials for blue-light-emitting phosphorescent organic electroluminescent devices," Adv. Mater. 17, 285-289 (2005).
  4. M. A. Baldo 1, D. F. O'Brien, Y. You, A. Shoustikov, S. Sibley, M. E. Thompson, S. R. Forrest, "Highly efficient phosphorescent emission from organic electroluminescent devices," Nature 395, 151-154 (1998).
  5. Z.-Q. Gao, M. Luo, X.-H. Sun, H.-L. Tam, M.-S. Wong, B.-X. Mi, P.-F. Xia, K.-W. Cheah, C.-H. Chen, "New host containing bipolar carrier transport moiety for high-efficiency electrophosphorescence at low voltages," Adv. Mater. 21, 688-692 (2009).
  6. D. Tanaka, H. Sasabe, Y.-J. Li, S.-J. Su, T. Takeda, J. Kido, "Ultra high efficiency green organic light-emitting devices," Jpn. J. Appl. Phys. 46, L10-L12 (2007).
  7. J.-N. Yu, M.-Y. Zhang, C. Li, Y. Z. Shang, Y.-F. Lü, B. Wei, W. Huang, "Fine-tuning the thicknesses of organic layers to realized high-efficiency and long-lifetime blue organic light-emitting diodes," Chin. Phys. B. 21, 083303-083303-5 (2012).
  8. J. Shinar, R. Shinar, "Organic light-emitting devices (OLEDs) and OLED-based chemical and biological sensors: An overview," Appl. Phys. 41, 1-26 (2008).
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  11. K. Okumoto, Y. Shirota, "Development of high-performance blue-violet-emitting organic electroluminescent devices," Appl. Phys. Lett. 79, 1231-1233 (2001).
  12. X.-H. Zhou, Y.-H. Niu, F. Huang, M. S. Liu, K.-Y. Jen, "Highly efficient UV-violet light emitting polymers derived from fluorine and tetraphenylsiane derivatives: Molecular design toward enhanced electroluminescent performance," Macromolecules 40, 3015-3020 (2007).
  13. Y. Chen, T. Yamamura, K. Igarashi, "Photosensitization of carvazole derivatives in cationic polymerization with a novel sensitivity to near-UV light," Polym. Chem. 38, 90-100 (2000).
  14. L. Zou, V. Sawate'ev, J. Booher, C.-H. Kim, J. Shinar, "Combinatorial fabrication and studies of intense efficient ultraviolet-violet organic light-emitting device arrays," Appl. Phys. Lett. 79, 2282-2284 (2001).
  15. H.-F. Xiang, Z.-X. Xu, V. A. Roy, C.-M. Che, P. T. Lai, "Star-configured carbazole as an efficient near-ultraviolet emitter and hole-transporting materials for organic light-emitting devices," Appl. Phys. Lett. 92, 073305-073305-3 (2008).
  16. H. Sasabe, J. Takamatsu, T. Motoyama, S. Watanabe, G. Wagenblast, N. Langer, O. Molt, E. Fuchs, C. Lennartz, J. Kido, "High-efficiency blue and white organic light-emitting devices incorporating a blue iridium carbine comples," Adv. Mater. 22, 5003-5007 (2010).
  17. N. C. Giebink, S. R. Forrest, "Quantum efficiency roll-off at high brightness in fluorescent and phosphorescent organic light emitting diodes," Phys. Rev. B. 77, 235215-235215-9 (2008).
  18. J.-H. Jou, P.-C. Chen, M.-C. Tang, Y.-S. Wang, C.-H. Lin, S.-H. Chen, C.-C. Chen, C.-C. Wang, C.-T. Chen, "Organic light-emitting diodes with roll-up character," J. Photon. Energy 2, 021208-021208-9 (2012).
  19. J. H. Ahn, C. Wang, I. F. Perepichka, M. R. Bryce, M. C. Petty, "Blue organic light emitting devices with improved colour purity and efficiency through blending of poly(9,9-dioctyl-2,7-fluorene) with an electron transporting material," J. Mater. Chem. 17, 2996-3001 (2007).
  20. B. D. Chin, M. C. Suh, M.-H. Kim, S. T. Lee, H. K. Chung, "Carrier trapping and efficient recombination of electrophosphorescent device with stepwise doping profile," Appl. Phys. Lett. 86, 133505-133505-3 (2005).
  21. Y. Tao, Q. Wang, C. Yang, Q. Wang, Z. Zhang, T. Zou, J. Qin, D. Ma, "A simple carbazole/oxadiazole hybrid molecule: An excellent bipolar host for green and red phosphorescent OLEDs," Angew. Chem. 120, 8224-8227 (2008).
  22. S. T. Hoffmann, P. Schrögel, M. Rothmann, R. Q. Alvuquerque, P. Strohriegl, A. Köhler, "Triplet excimer emission in a series of 4, 4'-Bis(N-carbazolyl)-2, 2'-biphenyl Derivatives," J. Phys. Chem. B 115, 414-421 (2010).
  23. J. Kalinowski, M. Cocchi, D. Virgili, V. Fattori, J. A. Gareth Williams, "Mixing of excimer and exciplex emission: A new way to improve white light emitting organic electrophosphorescent diodes," Adv. Mater. 19, 4000-4005 (2007).

2012 (2)

J.-N. Yu, M.-Y. Zhang, C. Li, Y. Z. Shang, Y.-F. Lü, B. Wei, W. Huang, "Fine-tuning the thicknesses of organic layers to realized high-efficiency and long-lifetime blue organic light-emitting diodes," Chin. Phys. B. 21, 083303-083303-5 (2012).

J.-H. Jou, P.-C. Chen, M.-C. Tang, Y.-S. Wang, C.-H. Lin, S.-H. Chen, C.-C. Chen, C.-C. Wang, C.-T. Chen, "Organic light-emitting diodes with roll-up character," J. Photon. Energy 2, 021208-021208-9 (2012).

2010 (2)

H. Sasabe, J. Takamatsu, T. Motoyama, S. Watanabe, G. Wagenblast, N. Langer, O. Molt, E. Fuchs, C. Lennartz, J. Kido, "High-efficiency blue and white organic light-emitting devices incorporating a blue iridium carbine comples," Adv. Mater. 22, 5003-5007 (2010).

S. T. Hoffmann, P. Schrögel, M. Rothmann, R. Q. Alvuquerque, P. Strohriegl, A. Köhler, "Triplet excimer emission in a series of 4, 4'-Bis(N-carbazolyl)-2, 2'-biphenyl Derivatives," J. Phys. Chem. B 115, 414-421 (2010).

2009 (1)

Z.-Q. Gao, M. Luo, X.-H. Sun, H.-L. Tam, M.-S. Wong, B.-X. Mi, P.-F. Xia, K.-W. Cheah, C.-H. Chen, "New host containing bipolar carrier transport moiety for high-efficiency electrophosphorescence at low voltages," Adv. Mater. 21, 688-692 (2009).

2008 (5)

S.-J. Su, E. Gonmori, H. Sasabe, J. Kido, "Highly efficient organic blue-and white-light-emitting devices having a carrier and exciton-confining structure for reduced efficiency roll-off," Adv. Mater. 20, 4189-4194 (2008).

J. Shinar, R. Shinar, "Organic light-emitting devices (OLEDs) and OLED-based chemical and biological sensors: An overview," Appl. Phys. 41, 1-26 (2008).

N. C. Giebink, S. R. Forrest, "Quantum efficiency roll-off at high brightness in fluorescent and phosphorescent organic light emitting diodes," Phys. Rev. B. 77, 235215-235215-9 (2008).

H.-F. Xiang, Z.-X. Xu, V. A. Roy, C.-M. Che, P. T. Lai, "Star-configured carbazole as an efficient near-ultraviolet emitter and hole-transporting materials for organic light-emitting devices," Appl. Phys. Lett. 92, 073305-073305-3 (2008).

Y. Tao, Q. Wang, C. Yang, Q. Wang, Z. Zhang, T. Zou, J. Qin, D. Ma, "A simple carbazole/oxadiazole hybrid molecule: An excellent bipolar host for green and red phosphorescent OLEDs," Angew. Chem. 120, 8224-8227 (2008).

2007 (4)

J. Kalinowski, M. Cocchi, D. Virgili, V. Fattori, J. A. Gareth Williams, "Mixing of excimer and exciplex emission: A new way to improve white light emitting organic electrophosphorescent diodes," Adv. Mater. 19, 4000-4005 (2007).

J. H. Ahn, C. Wang, I. F. Perepichka, M. R. Bryce, M. C. Petty, "Blue organic light emitting devices with improved colour purity and efficiency through blending of poly(9,9-dioctyl-2,7-fluorene) with an electron transporting material," J. Mater. Chem. 17, 2996-3001 (2007).

X.-H. Zhou, Y.-H. Niu, F. Huang, M. S. Liu, K.-Y. Jen, "Highly efficient UV-violet light emitting polymers derived from fluorine and tetraphenylsiane derivatives: Molecular design toward enhanced electroluminescent performance," Macromolecules 40, 3015-3020 (2007).

D. Tanaka, H. Sasabe, Y.-J. Li, S.-J. Su, T. Takeda, J. Kido, "Ultra high efficiency green organic light-emitting devices," Jpn. J. Appl. Phys. 46, L10-L12 (2007).

2005 (4)

S.-J. Yeh, M.-F. Wu, C.-T. Chen, Y.-H. Song, Y. Chi, M.-H. Ho, S.-F. Hsu, C. H. Chen, "New dopant and host materials for blue-light-emitting phosphorescent organic electroluminescent devices," Adv. Mater. 17, 285-289 (2005).

T.-C. Chao, Y.-T. Lin, C.-Y. Yang, T. S. Hung, H.-C. Chou, C.-C. Wu, K.-T. Wong, "Highly efficient UV organic light-emitting devices based on bi(9,9-diarylfluorene)s," Adv. Mater. 17, 992-996 (2005).

S. W. Wen, M.-T. Lee, C.-H. Chen, "Recent development of blue fluorescent OLED materials and devices," J. Display Technol. 1, 90-99 (2005).

B. D. Chin, M. C. Suh, M.-H. Kim, S. T. Lee, H. K. Chung, "Carrier trapping and efficient recombination of electrophosphorescent device with stepwise doping profile," Appl. Phys. Lett. 86, 133505-133505-3 (2005).

2004 (1)

V. Shukla, M. Bajpai, D. K. Singh, M. Singh, R. Shukla, "Review of basic chemistry of UV-curing technology," Pigm. Resin Technol. 33, 272-279 (2004).

2001 (2)

K. Okumoto, Y. Shirota, "Development of high-performance blue-violet-emitting organic electroluminescent devices," Appl. Phys. Lett. 79, 1231-1233 (2001).

L. Zou, V. Sawate'ev, J. Booher, C.-H. Kim, J. Shinar, "Combinatorial fabrication and studies of intense efficient ultraviolet-violet organic light-emitting device arrays," Appl. Phys. Lett. 79, 2282-2284 (2001).

2000 (1)

Y. Chen, T. Yamamura, K. Igarashi, "Photosensitization of carvazole derivatives in cationic polymerization with a novel sensitivity to near-UV light," Polym. Chem. 38, 90-100 (2000).

1998 (1)

M. A. Baldo 1, D. F. O'Brien, Y. You, A. Shoustikov, S. Sibley, M. E. Thompson, S. R. Forrest, "Highly efficient phosphorescent emission from organic electroluminescent devices," Nature 395, 151-154 (1998).

Adv. Mater. (2)

T.-C. Chao, Y.-T. Lin, C.-Y. Yang, T. S. Hung, H.-C. Chou, C.-C. Wu, K.-T. Wong, "Highly efficient UV organic light-emitting devices based on bi(9,9-diarylfluorene)s," Adv. Mater. 17, 992-996 (2005).

H. Sasabe, J. Takamatsu, T. Motoyama, S. Watanabe, G. Wagenblast, N. Langer, O. Molt, E. Fuchs, C. Lennartz, J. Kido, "High-efficiency blue and white organic light-emitting devices incorporating a blue iridium carbine comples," Adv. Mater. 22, 5003-5007 (2010).

Adv. Mater. (4)

S.-J. Su, E. Gonmori, H. Sasabe, J. Kido, "Highly efficient organic blue-and white-light-emitting devices having a carrier and exciton-confining structure for reduced efficiency roll-off," Adv. Mater. 20, 4189-4194 (2008).

S.-J. Yeh, M.-F. Wu, C.-T. Chen, Y.-H. Song, Y. Chi, M.-H. Ho, S.-F. Hsu, C. H. Chen, "New dopant and host materials for blue-light-emitting phosphorescent organic electroluminescent devices," Adv. Mater. 17, 285-289 (2005).

Z.-Q. Gao, M. Luo, X.-H. Sun, H.-L. Tam, M.-S. Wong, B.-X. Mi, P.-F. Xia, K.-W. Cheah, C.-H. Chen, "New host containing bipolar carrier transport moiety for high-efficiency electrophosphorescence at low voltages," Adv. Mater. 21, 688-692 (2009).

J. Kalinowski, M. Cocchi, D. Virgili, V. Fattori, J. A. Gareth Williams, "Mixing of excimer and exciplex emission: A new way to improve white light emitting organic electrophosphorescent diodes," Adv. Mater. 19, 4000-4005 (2007).

Angew. Chem. (1)

Y. Tao, Q. Wang, C. Yang, Q. Wang, Z. Zhang, T. Zou, J. Qin, D. Ma, "A simple carbazole/oxadiazole hybrid molecule: An excellent bipolar host for green and red phosphorescent OLEDs," Angew. Chem. 120, 8224-8227 (2008).

Appl. Phys. (1)

J. Shinar, R. Shinar, "Organic light-emitting devices (OLEDs) and OLED-based chemical and biological sensors: An overview," Appl. Phys. 41, 1-26 (2008).

Appl. Phys. Lett. (4)

L. Zou, V. Sawate'ev, J. Booher, C.-H. Kim, J. Shinar, "Combinatorial fabrication and studies of intense efficient ultraviolet-violet organic light-emitting device arrays," Appl. Phys. Lett. 79, 2282-2284 (2001).

H.-F. Xiang, Z.-X. Xu, V. A. Roy, C.-M. Che, P. T. Lai, "Star-configured carbazole as an efficient near-ultraviolet emitter and hole-transporting materials for organic light-emitting devices," Appl. Phys. Lett. 92, 073305-073305-3 (2008).

K. Okumoto, Y. Shirota, "Development of high-performance blue-violet-emitting organic electroluminescent devices," Appl. Phys. Lett. 79, 1231-1233 (2001).

B. D. Chin, M. C. Suh, M.-H. Kim, S. T. Lee, H. K. Chung, "Carrier trapping and efficient recombination of electrophosphorescent device with stepwise doping profile," Appl. Phys. Lett. 86, 133505-133505-3 (2005).

Chin. Phys. B. (1)

J.-N. Yu, M.-Y. Zhang, C. Li, Y. Z. Shang, Y.-F. Lü, B. Wei, W. Huang, "Fine-tuning the thicknesses of organic layers to realized high-efficiency and long-lifetime blue organic light-emitting diodes," Chin. Phys. B. 21, 083303-083303-5 (2012).

J. Display Technol. (1)

S. W. Wen, M.-T. Lee, C.-H. Chen, "Recent development of blue fluorescent OLED materials and devices," J. Display Technol. 1, 90-99 (2005).

J. Mater. Chem. (1)

J. H. Ahn, C. Wang, I. F. Perepichka, M. R. Bryce, M. C. Petty, "Blue organic light emitting devices with improved colour purity and efficiency through blending of poly(9,9-dioctyl-2,7-fluorene) with an electron transporting material," J. Mater. Chem. 17, 2996-3001 (2007).

J. Photon. Energy (1)

J.-H. Jou, P.-C. Chen, M.-C. Tang, Y.-S. Wang, C.-H. Lin, S.-H. Chen, C.-C. Chen, C.-C. Wang, C.-T. Chen, "Organic light-emitting diodes with roll-up character," J. Photon. Energy 2, 021208-021208-9 (2012).

J. Phys. Chem. B (1)

S. T. Hoffmann, P. Schrögel, M. Rothmann, R. Q. Alvuquerque, P. Strohriegl, A. Köhler, "Triplet excimer emission in a series of 4, 4'-Bis(N-carbazolyl)-2, 2'-biphenyl Derivatives," J. Phys. Chem. B 115, 414-421 (2010).

Jpn. J. Appl. Phys. (1)

D. Tanaka, H. Sasabe, Y.-J. Li, S.-J. Su, T. Takeda, J. Kido, "Ultra high efficiency green organic light-emitting devices," Jpn. J. Appl. Phys. 46, L10-L12 (2007).

Macromolecules (1)

X.-H. Zhou, Y.-H. Niu, F. Huang, M. S. Liu, K.-Y. Jen, "Highly efficient UV-violet light emitting polymers derived from fluorine and tetraphenylsiane derivatives: Molecular design toward enhanced electroluminescent performance," Macromolecules 40, 3015-3020 (2007).

Nature (1)

M. A. Baldo 1, D. F. O'Brien, Y. You, A. Shoustikov, S. Sibley, M. E. Thompson, S. R. Forrest, "Highly efficient phosphorescent emission from organic electroluminescent devices," Nature 395, 151-154 (1998).

Phys. Rev. B. (1)

N. C. Giebink, S. R. Forrest, "Quantum efficiency roll-off at high brightness in fluorescent and phosphorescent organic light emitting diodes," Phys. Rev. B. 77, 235215-235215-9 (2008).

Pigm. Resin Technol. (1)

V. Shukla, M. Bajpai, D. K. Singh, M. Singh, R. Shukla, "Review of basic chemistry of UV-curing technology," Pigm. Resin Technol. 33, 272-279 (2004).

Polym. Chem. (1)

Y. Chen, T. Yamamura, K. Igarashi, "Photosensitization of carvazole derivatives in cationic polymerization with a novel sensitivity to near-UV light," Polym. Chem. 38, 90-100 (2000).

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