Abstract

In this study, deep blue, pure electroluminescence (EL) at 441.5 nm from a ZnSe/ZnS quantum dot light-emitting device (QD-LED) is obtained by using poly (4-butylphenyl-diphenyl-amine) (poly-TPD) as the hole-transport layer (HTL) to open up the channel for energy transfer from poly-TPD to QDs. The emission originating from HTL is observed in the QD-LED with N,N-bis (tolyl)-N,N-diphenyl-1,1-biphenyl-4,4-diamine functionalized with two styryl groups (2-TPD) as the HTL due to inefficient energy-transfer from 2-TPD to QDs. The poly-TPD based device exhibits color-saturated blue emission with a narrow spectral bandwidth of full width at half maximum (17.2nm). These results explore the operating mechanism of the QD EL and signify a remarkable progress in deep blue QD-LEDs based on environmental-friendly QD materials.

© 2012 Optical Society of America

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  1. V. Wood and V. Bulovic, Nano Rev. 1, 5205 (2010).
    [CrossRef]
  2. B. Sarkar, Heavy Metals in the Environment, (CRC, 2002).
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    [CrossRef]
  4. X. Yang, D. Zhao, K. Leck, S. Tan, Y. Tang, J. Zhao, H. Demir, and X. Sun, Adv. Mat. 24, 4180 (2012).
    [CrossRef]
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    [CrossRef]
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  7. Z. Tan, Y. Zhang, C. Xie, H. Su, J. Liu, C. Zhang, N. Dellas, S. Mohney, Y. Wang, J. Wang, and J. Xu, Adv. Mater. 23, 3553 (2011).
    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
  17. H. Shen, H. Wang, X. Li, J. Niu, H. Wang, X. Chen, and L. Li, Dalton Trans., 200910540 (2009).
    [CrossRef]
  18. P. Anikeeva, J. Halpert, M. Bawendi, and V. Bulović, Nano Lett. 7, 2196 (2007).
    [CrossRef]
  19. Y. Li, A. Rizzo, R. Cingolani, and G. Gigli, Adv. Mater. 18, 2545 (2006).
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  21. P. Jing, J. Zheng, Q. Zeng, Y. Zhang, X. Liu, X. Liu, X. Kong, and J. Zhao, J. App. Phys. 105, 044313 (2009).
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2012 (2)

C. Xiang, W. Koo, S. Chen, F. So, X. Liu, X. Kong, and Y. Wang, Appl. Phys. Lett. 101, 053303 (2012).
[CrossRef]

X. Yang, D. Zhao, K. Leck, S. Tan, Y. Tang, J. Zhao, H. Demir, and X. Sun, Adv. Mat. 24, 4180 (2012).
[CrossRef]

2011 (6)

D. Puzzo, E. Henderson, M. G. Helander, Z. B. Wang, G. A. Ozin, and Z. Lu, Nano Lett. 11, 1585 (2011).
[CrossRef]

S. Dey and S. Nath, J. Lumin. 131, 2707 (2011).
[CrossRef]

Z. Tan, Y. Zhang, C. Xie, H. Su, J. Liu, C. Zhang, N. Dellas, S. Mohney, Y. Wang, J. Wang, and J. Xu, Adv. Mater. 23, 3553 (2011).
[CrossRef]

Y. Zhang, C. Xie, H. Su, J. Liu, S. Pickering, Y. Wang, W. Yu, J. Wang, Y. Wang, J. Hahm, N. Dellas, S. Mohney, and J. Xu, Nano Lett. 11, 329 (2011).
[CrossRef]

L. Qian, Y. Zheng, J. Xue, and P. Holloway, Nat. Photonics 5, 543 (2011).
[CrossRef]

T. Kim, K. Cho, E. Lee, S. Lee, J. Chae, J. Kim, D. Kim, J. Kwon, G. Amaratunga, S. Lee, B. Choi, Y. Kuk, J. Kim, and K. Kim, Nat. Photonics 5, 176 (2011).
[CrossRef]

2010 (2)

V. Wood and V. Bulovic, Nano Rev. 1, 5205 (2010).
[CrossRef]

Z. Liu, M. Helander, Z. Wang, and Z. Lu, J. Phys. Chem. C 114, 16746 (2010).
[CrossRef]

2009 (4)

P. Jing, J. Zheng, Q. Zeng, Y. Zhang, X. Liu, X. Liu, X. Kong, and J. Zhao, J. App. Phys. 105, 044313 (2009).
[CrossRef]

H. Shen, H. Wang, X. Li, J. Niu, H. Wang, X. Chen, and L. Li, Dalton Trans., 200910540 (2009).
[CrossRef]

P. Anikeeva, J. Halpert, M. Bawendi, and V. Bulović, Nano Lett. 9, 2532 (2009).
[CrossRef]

W. Bae, J. Kwak, J. Lim, D. Lee, M. Nam, K. Char, C. Lee, and S. Lee, Nanotech. 20, 075202 (2009).
[CrossRef]

2008 (1)

L. Kim, P. Anikeeva, S. Coe-Sullivan, J. S. Steckel, M. Bawendi, and V. Bulović, Nano Lett. 8, 4513 (2008).
[CrossRef]

2007 (2)

A. Rizzo, Y. Li, S. Kudera, F. Della Sala, M. Zanella, W. Parak, R. Cingolani, L. Manna, and G. Gigli, Appl. Phys. Lett. 90, 051106 (2007).
[CrossRef]

P. Anikeeva, J. Halpert, M. Bawendi, and V. Bulović, Nano Lett. 7, 2196 (2007).
[CrossRef]

2006 (1)

Y. Li, A. Rizzo, R. Cingolani, and G. Gigli, Adv. Mater. 18, 2545 (2006).
[CrossRef]

2005 (1)

S. Jun and E. Jang, Chem. Commun., 20054616 (2005).
[CrossRef]

2004 (1)

J. Steckel, J. Zimmer, S. Coe-Sullivan, N. Stott, V. Bulovic, and M. Bawendi, Angew. Chem. Int. Ed. 43, 2154 (2004).
[CrossRef]

1989 (1)

J. Xia, Phys. Rev. B 40, 8500 (1989).
[CrossRef]

1948 (1)

T. Förster, Ann. Phys. 437, 55 (1948).
[CrossRef]

Amaratunga, G.

T. Kim, K. Cho, E. Lee, S. Lee, J. Chae, J. Kim, D. Kim, J. Kwon, G. Amaratunga, S. Lee, B. Choi, Y. Kuk, J. Kim, and K. Kim, Nat. Photonics 5, 176 (2011).
[CrossRef]

Anikeeva, P.

P. Anikeeva, J. Halpert, M. Bawendi, and V. Bulović, Nano Lett. 9, 2532 (2009).
[CrossRef]

L. Kim, P. Anikeeva, S. Coe-Sullivan, J. S. Steckel, M. Bawendi, and V. Bulović, Nano Lett. 8, 4513 (2008).
[CrossRef]

P. Anikeeva, J. Halpert, M. Bawendi, and V. Bulović, Nano Lett. 7, 2196 (2007).
[CrossRef]

Bae, W.

W. Bae, J. Kwak, J. Lim, D. Lee, M. Nam, K. Char, C. Lee, and S. Lee, Nanotech. 20, 075202 (2009).
[CrossRef]

Bawendi, M.

P. Anikeeva, J. Halpert, M. Bawendi, and V. Bulović, Nano Lett. 9, 2532 (2009).
[CrossRef]

L. Kim, P. Anikeeva, S. Coe-Sullivan, J. S. Steckel, M. Bawendi, and V. Bulović, Nano Lett. 8, 4513 (2008).
[CrossRef]

P. Anikeeva, J. Halpert, M. Bawendi, and V. Bulović, Nano Lett. 7, 2196 (2007).
[CrossRef]

J. Steckel, J. Zimmer, S. Coe-Sullivan, N. Stott, V. Bulovic, and M. Bawendi, Angew. Chem. Int. Ed. 43, 2154 (2004).
[CrossRef]

Bulovic, V.

V. Wood and V. Bulovic, Nano Rev. 1, 5205 (2010).
[CrossRef]

P. Anikeeva, J. Halpert, M. Bawendi, and V. Bulović, Nano Lett. 9, 2532 (2009).
[CrossRef]

L. Kim, P. Anikeeva, S. Coe-Sullivan, J. S. Steckel, M. Bawendi, and V. Bulović, Nano Lett. 8, 4513 (2008).
[CrossRef]

P. Anikeeva, J. Halpert, M. Bawendi, and V. Bulović, Nano Lett. 7, 2196 (2007).
[CrossRef]

J. Steckel, J. Zimmer, S. Coe-Sullivan, N. Stott, V. Bulovic, and M. Bawendi, Angew. Chem. Int. Ed. 43, 2154 (2004).
[CrossRef]

Chae, J.

T. Kim, K. Cho, E. Lee, S. Lee, J. Chae, J. Kim, D. Kim, J. Kwon, G. Amaratunga, S. Lee, B. Choi, Y. Kuk, J. Kim, and K. Kim, Nat. Photonics 5, 176 (2011).
[CrossRef]

Char, K.

W. Bae, J. Kwak, J. Lim, D. Lee, M. Nam, K. Char, C. Lee, and S. Lee, Nanotech. 20, 075202 (2009).
[CrossRef]

Chen, S.

C. Xiang, W. Koo, S. Chen, F. So, X. Liu, X. Kong, and Y. Wang, Appl. Phys. Lett. 101, 053303 (2012).
[CrossRef]

Chen, X.

H. Shen, H. Wang, X. Li, J. Niu, H. Wang, X. Chen, and L. Li, Dalton Trans., 200910540 (2009).
[CrossRef]

Cho, K.

T. Kim, K. Cho, E. Lee, S. Lee, J. Chae, J. Kim, D. Kim, J. Kwon, G. Amaratunga, S. Lee, B. Choi, Y. Kuk, J. Kim, and K. Kim, Nat. Photonics 5, 176 (2011).
[CrossRef]

Choi, B.

T. Kim, K. Cho, E. Lee, S. Lee, J. Chae, J. Kim, D. Kim, J. Kwon, G. Amaratunga, S. Lee, B. Choi, Y. Kuk, J. Kim, and K. Kim, Nat. Photonics 5, 176 (2011).
[CrossRef]

Cingolani, R.

A. Rizzo, Y. Li, S. Kudera, F. Della Sala, M. Zanella, W. Parak, R. Cingolani, L. Manna, and G. Gigli, Appl. Phys. Lett. 90, 051106 (2007).
[CrossRef]

Y. Li, A. Rizzo, R. Cingolani, and G. Gigli, Adv. Mater. 18, 2545 (2006).
[CrossRef]

Coe-Sullivan, S.

L. Kim, P. Anikeeva, S. Coe-Sullivan, J. S. Steckel, M. Bawendi, and V. Bulović, Nano Lett. 8, 4513 (2008).
[CrossRef]

J. Steckel, J. Zimmer, S. Coe-Sullivan, N. Stott, V. Bulovic, and M. Bawendi, Angew. Chem. Int. Ed. 43, 2154 (2004).
[CrossRef]

Della Sala, F.

A. Rizzo, Y. Li, S. Kudera, F. Della Sala, M. Zanella, W. Parak, R. Cingolani, L. Manna, and G. Gigli, Appl. Phys. Lett. 90, 051106 (2007).
[CrossRef]

Dellas, N.

Y. Zhang, C. Xie, H. Su, J. Liu, S. Pickering, Y. Wang, W. Yu, J. Wang, Y. Wang, J. Hahm, N. Dellas, S. Mohney, and J. Xu, Nano Lett. 11, 329 (2011).
[CrossRef]

Z. Tan, Y. Zhang, C. Xie, H. Su, J. Liu, C. Zhang, N. Dellas, S. Mohney, Y. Wang, J. Wang, and J. Xu, Adv. Mater. 23, 3553 (2011).
[CrossRef]

Demir, H.

X. Yang, D. Zhao, K. Leck, S. Tan, Y. Tang, J. Zhao, H. Demir, and X. Sun, Adv. Mat. 24, 4180 (2012).
[CrossRef]

Dey, S.

S. Dey and S. Nath, J. Lumin. 131, 2707 (2011).
[CrossRef]

Förster, T.

T. Förster, Ann. Phys. 437, 55 (1948).
[CrossRef]

Gigli, G.

A. Rizzo, Y. Li, S. Kudera, F. Della Sala, M. Zanella, W. Parak, R. Cingolani, L. Manna, and G. Gigli, Appl. Phys. Lett. 90, 051106 (2007).
[CrossRef]

Y. Li, A. Rizzo, R. Cingolani, and G. Gigli, Adv. Mater. 18, 2545 (2006).
[CrossRef]

Hahm, J.

Y. Zhang, C. Xie, H. Su, J. Liu, S. Pickering, Y. Wang, W. Yu, J. Wang, Y. Wang, J. Hahm, N. Dellas, S. Mohney, and J. Xu, Nano Lett. 11, 329 (2011).
[CrossRef]

Halpert, J.

P. Anikeeva, J. Halpert, M. Bawendi, and V. Bulović, Nano Lett. 9, 2532 (2009).
[CrossRef]

P. Anikeeva, J. Halpert, M. Bawendi, and V. Bulović, Nano Lett. 7, 2196 (2007).
[CrossRef]

Helander, M.

Z. Liu, M. Helander, Z. Wang, and Z. Lu, J. Phys. Chem. C 114, 16746 (2010).
[CrossRef]

Helander, M. G.

D. Puzzo, E. Henderson, M. G. Helander, Z. B. Wang, G. A. Ozin, and Z. Lu, Nano Lett. 11, 1585 (2011).
[CrossRef]

Henderson, E.

D. Puzzo, E. Henderson, M. G. Helander, Z. B. Wang, G. A. Ozin, and Z. Lu, Nano Lett. 11, 1585 (2011).
[CrossRef]

Holloway, P.

L. Qian, Y. Zheng, J. Xue, and P. Holloway, Nat. Photonics 5, 543 (2011).
[CrossRef]

Jang, E.

S. Jun and E. Jang, Chem. Commun., 20054616 (2005).
[CrossRef]

Jing, P.

P. Jing, J. Zheng, Q. Zeng, Y. Zhang, X. Liu, X. Liu, X. Kong, and J. Zhao, J. App. Phys. 105, 044313 (2009).
[CrossRef]

Jun, S.

S. Jun and E. Jang, Chem. Commun., 20054616 (2005).
[CrossRef]

Kim, D.

T. Kim, K. Cho, E. Lee, S. Lee, J. Chae, J. Kim, D. Kim, J. Kwon, G. Amaratunga, S. Lee, B. Choi, Y. Kuk, J. Kim, and K. Kim, Nat. Photonics 5, 176 (2011).
[CrossRef]

Kim, J.

T. Kim, K. Cho, E. Lee, S. Lee, J. Chae, J. Kim, D. Kim, J. Kwon, G. Amaratunga, S. Lee, B. Choi, Y. Kuk, J. Kim, and K. Kim, Nat. Photonics 5, 176 (2011).
[CrossRef]

T. Kim, K. Cho, E. Lee, S. Lee, J. Chae, J. Kim, D. Kim, J. Kwon, G. Amaratunga, S. Lee, B. Choi, Y. Kuk, J. Kim, and K. Kim, Nat. Photonics 5, 176 (2011).
[CrossRef]

Kim, K.

T. Kim, K. Cho, E. Lee, S. Lee, J. Chae, J. Kim, D. Kim, J. Kwon, G. Amaratunga, S. Lee, B. Choi, Y. Kuk, J. Kim, and K. Kim, Nat. Photonics 5, 176 (2011).
[CrossRef]

Kim, L.

L. Kim, P. Anikeeva, S. Coe-Sullivan, J. S. Steckel, M. Bawendi, and V. Bulović, Nano Lett. 8, 4513 (2008).
[CrossRef]

Kim, T.

T. Kim, K. Cho, E. Lee, S. Lee, J. Chae, J. Kim, D. Kim, J. Kwon, G. Amaratunga, S. Lee, B. Choi, Y. Kuk, J. Kim, and K. Kim, Nat. Photonics 5, 176 (2011).
[CrossRef]

Kong, X.

C. Xiang, W. Koo, S. Chen, F. So, X. Liu, X. Kong, and Y. Wang, Appl. Phys. Lett. 101, 053303 (2012).
[CrossRef]

P. Jing, J. Zheng, Q. Zeng, Y. Zhang, X. Liu, X. Liu, X. Kong, and J. Zhao, J. App. Phys. 105, 044313 (2009).
[CrossRef]

Koo, W.

C. Xiang, W. Koo, S. Chen, F. So, X. Liu, X. Kong, and Y. Wang, Appl. Phys. Lett. 101, 053303 (2012).
[CrossRef]

Kudera, S.

A. Rizzo, Y. Li, S. Kudera, F. Della Sala, M. Zanella, W. Parak, R. Cingolani, L. Manna, and G. Gigli, Appl. Phys. Lett. 90, 051106 (2007).
[CrossRef]

Kuk, Y.

T. Kim, K. Cho, E. Lee, S. Lee, J. Chae, J. Kim, D. Kim, J. Kwon, G. Amaratunga, S. Lee, B. Choi, Y. Kuk, J. Kim, and K. Kim, Nat. Photonics 5, 176 (2011).
[CrossRef]

Kwak, J.

W. Bae, J. Kwak, J. Lim, D. Lee, M. Nam, K. Char, C. Lee, and S. Lee, Nanotech. 20, 075202 (2009).
[CrossRef]

Kwon, J.

T. Kim, K. Cho, E. Lee, S. Lee, J. Chae, J. Kim, D. Kim, J. Kwon, G. Amaratunga, S. Lee, B. Choi, Y. Kuk, J. Kim, and K. Kim, Nat. Photonics 5, 176 (2011).
[CrossRef]

Leck, K.

X. Yang, D. Zhao, K. Leck, S. Tan, Y. Tang, J. Zhao, H. Demir, and X. Sun, Adv. Mat. 24, 4180 (2012).
[CrossRef]

Lee, C.

W. Bae, J. Kwak, J. Lim, D. Lee, M. Nam, K. Char, C. Lee, and S. Lee, Nanotech. 20, 075202 (2009).
[CrossRef]

Lee, D.

W. Bae, J. Kwak, J. Lim, D. Lee, M. Nam, K. Char, C. Lee, and S. Lee, Nanotech. 20, 075202 (2009).
[CrossRef]

Lee, E.

T. Kim, K. Cho, E. Lee, S. Lee, J. Chae, J. Kim, D. Kim, J. Kwon, G. Amaratunga, S. Lee, B. Choi, Y. Kuk, J. Kim, and K. Kim, Nat. Photonics 5, 176 (2011).
[CrossRef]

Lee, S.

T. Kim, K. Cho, E. Lee, S. Lee, J. Chae, J. Kim, D. Kim, J. Kwon, G. Amaratunga, S. Lee, B. Choi, Y. Kuk, J. Kim, and K. Kim, Nat. Photonics 5, 176 (2011).
[CrossRef]

T. Kim, K. Cho, E. Lee, S. Lee, J. Chae, J. Kim, D. Kim, J. Kwon, G. Amaratunga, S. Lee, B. Choi, Y. Kuk, J. Kim, and K. Kim, Nat. Photonics 5, 176 (2011).
[CrossRef]

W. Bae, J. Kwak, J. Lim, D. Lee, M. Nam, K. Char, C. Lee, and S. Lee, Nanotech. 20, 075202 (2009).
[CrossRef]

Li, L.

H. Shen, H. Wang, X. Li, J. Niu, H. Wang, X. Chen, and L. Li, Dalton Trans., 200910540 (2009).
[CrossRef]

Li, X.

H. Shen, H. Wang, X. Li, J. Niu, H. Wang, X. Chen, and L. Li, Dalton Trans., 200910540 (2009).
[CrossRef]

Li, Y.

A. Rizzo, Y. Li, S. Kudera, F. Della Sala, M. Zanella, W. Parak, R. Cingolani, L. Manna, and G. Gigli, Appl. Phys. Lett. 90, 051106 (2007).
[CrossRef]

Y. Li, A. Rizzo, R. Cingolani, and G. Gigli, Adv. Mater. 18, 2545 (2006).
[CrossRef]

Lim, J.

W. Bae, J. Kwak, J. Lim, D. Lee, M. Nam, K. Char, C. Lee, and S. Lee, Nanotech. 20, 075202 (2009).
[CrossRef]

Liu, J.

Y. Zhang, C. Xie, H. Su, J. Liu, S. Pickering, Y. Wang, W. Yu, J. Wang, Y. Wang, J. Hahm, N. Dellas, S. Mohney, and J. Xu, Nano Lett. 11, 329 (2011).
[CrossRef]

Z. Tan, Y. Zhang, C. Xie, H. Su, J. Liu, C. Zhang, N. Dellas, S. Mohney, Y. Wang, J. Wang, and J. Xu, Adv. Mater. 23, 3553 (2011).
[CrossRef]

Liu, X.

C. Xiang, W. Koo, S. Chen, F. So, X. Liu, X. Kong, and Y. Wang, Appl. Phys. Lett. 101, 053303 (2012).
[CrossRef]

P. Jing, J. Zheng, Q. Zeng, Y. Zhang, X. Liu, X. Liu, X. Kong, and J. Zhao, J. App. Phys. 105, 044313 (2009).
[CrossRef]

P. Jing, J. Zheng, Q. Zeng, Y. Zhang, X. Liu, X. Liu, X. Kong, and J. Zhao, J. App. Phys. 105, 044313 (2009).
[CrossRef]

Liu, Z.

Z. Liu, M. Helander, Z. Wang, and Z. Lu, J. Phys. Chem. C 114, 16746 (2010).
[CrossRef]

Lu, Z.

D. Puzzo, E. Henderson, M. G. Helander, Z. B. Wang, G. A. Ozin, and Z. Lu, Nano Lett. 11, 1585 (2011).
[CrossRef]

Z. Liu, M. Helander, Z. Wang, and Z. Lu, J. Phys. Chem. C 114, 16746 (2010).
[CrossRef]

Manna, L.

A. Rizzo, Y. Li, S. Kudera, F. Della Sala, M. Zanella, W. Parak, R. Cingolani, L. Manna, and G. Gigli, Appl. Phys. Lett. 90, 051106 (2007).
[CrossRef]

Mohney, S.

Y. Zhang, C. Xie, H. Su, J. Liu, S. Pickering, Y. Wang, W. Yu, J. Wang, Y. Wang, J. Hahm, N. Dellas, S. Mohney, and J. Xu, Nano Lett. 11, 329 (2011).
[CrossRef]

Z. Tan, Y. Zhang, C. Xie, H. Su, J. Liu, C. Zhang, N. Dellas, S. Mohney, Y. Wang, J. Wang, and J. Xu, Adv. Mater. 23, 3553 (2011).
[CrossRef]

Nam, M.

W. Bae, J. Kwak, J. Lim, D. Lee, M. Nam, K. Char, C. Lee, and S. Lee, Nanotech. 20, 075202 (2009).
[CrossRef]

Nath, S.

S. Dey and S. Nath, J. Lumin. 131, 2707 (2011).
[CrossRef]

Niu, J.

H. Shen, H. Wang, X. Li, J. Niu, H. Wang, X. Chen, and L. Li, Dalton Trans., 200910540 (2009).
[CrossRef]

Ozin, G. A.

D. Puzzo, E. Henderson, M. G. Helander, Z. B. Wang, G. A. Ozin, and Z. Lu, Nano Lett. 11, 1585 (2011).
[CrossRef]

Parak, W.

A. Rizzo, Y. Li, S. Kudera, F. Della Sala, M. Zanella, W. Parak, R. Cingolani, L. Manna, and G. Gigli, Appl. Phys. Lett. 90, 051106 (2007).
[CrossRef]

Pickering, S.

Y. Zhang, C. Xie, H. Su, J. Liu, S. Pickering, Y. Wang, W. Yu, J. Wang, Y. Wang, J. Hahm, N. Dellas, S. Mohney, and J. Xu, Nano Lett. 11, 329 (2011).
[CrossRef]

Puzzo, D.

D. Puzzo, E. Henderson, M. G. Helander, Z. B. Wang, G. A. Ozin, and Z. Lu, Nano Lett. 11, 1585 (2011).
[CrossRef]

Qian, L.

L. Qian, Y. Zheng, J. Xue, and P. Holloway, Nat. Photonics 5, 543 (2011).
[CrossRef]

Rizzo, A.

A. Rizzo, Y. Li, S. Kudera, F. Della Sala, M. Zanella, W. Parak, R. Cingolani, L. Manna, and G. Gigli, Appl. Phys. Lett. 90, 051106 (2007).
[CrossRef]

Y. Li, A. Rizzo, R. Cingolani, and G. Gigli, Adv. Mater. 18, 2545 (2006).
[CrossRef]

Sarkar, B.

B. Sarkar, Heavy Metals in the Environment, (CRC, 2002).

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Adv. Mat. (1)

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L. Kim, P. Anikeeva, S. Coe-Sullivan, J. S. Steckel, M. Bawendi, and V. Bulović, Nano Lett. 8, 4513 (2008).
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Y. Zhang, C. Xie, H. Su, J. Liu, S. Pickering, Y. Wang, W. Yu, J. Wang, Y. Wang, J. Hahm, N. Dellas, S. Mohney, and J. Xu, Nano Lett. 11, 329 (2011).
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V. Wood and V. Bulovic, Nano Rev. 1, 5205 (2010).
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Other (1)

B. Sarkar, Heavy Metals in the Environment, (CRC, 2002).

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Figures (3)

Fig. 1.
Fig. 1.

SEM images of ZnSe/ZnS QDs spin-coated on the poly-TPD film for (a) high and (b) low resolution.

Fig. 2.
Fig. 2.

(a) EL spectra of ZnSe/ZnS QD-LEDs with different HTLs and the PL spectrum of the QDs in toluene. Inset shows the EL spectra of device B at different voltage. (b) Energy-level diagram of the materials used in our work. (c) Absorption spectrum of the QDs and EL spectra from poly-TPD and 2-TPD.

Fig. 3.
Fig. 3.

(a) Current density–voltage-luminance. (b) Current density–efficiency curves of device A.

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