Application of semiconductor quantum dots to white-light-emitting diodes

Gao Xiao-Qin; Zhuo Ning-Ze; Wang Hai-Bo; Cui Yi-Ping; Zhang Jia-Yu

doi:10.7498/aps.64.137801

Abstract

Based on the electro-optical energy transfer process, the pseudo-spectral-luminous efficiency function (QD) of quantum dots (QDs) is introduced, the equations of chromaticity coordinates, luminous efficiency, and the QDs' mass of the white-light-emitting devices with CdSe, CuInS2 or CdS:Mn QDs are obtained, and the calculated results are in agreement with the experimental data. For a certain luminescent peak wavelength, when the full width at half maximum of the QD's photoluminescence becomes larger, the QD value becomes smaller while the chromaticity coordinates become more different from those of the corresponding monochromatic light. It is indicated that the color rendering index (CRI) of the devices is strongly dependent on the photoluminescent position and width of the QDs, and the CRI value can be increased towards 98 when a certain kind of CdS:Mn QDs is added into the traditional white-light LEDs.

Keywords:

Authors and contacts

1.
School of Electronic Science and Engineering, Advanced Photonics Center, Southeast University, Nanjing 210096, China;
2.
Research Institute of Electric Light Source Materials, Nanjing University of Technology, Nanjing 210015, China
Funds: Project supported by the National Basic Research Program of China (Grant No. 2012CB921801), and the Science and Technology Department of JiangSu Province, China (Grant No. BE2012163).

References

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[10]	Wang X B, Yan X S, Li W W, Sun K 2012 Adv. Mater. 24 2742
[11]	Fang D F, Ding X, Dai R C, Zhao Z, Wang Z P, Zhang Z M 2014 Chin. Phys. B 23 127804
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Cited By

[1]	Liu M Q 2013 LED and Its Application Technology (Beijing:Chemical Industry Press) p15-19, 95-97 (in Chinese) [刘木清 2013 LED 及其应用技术 (北京: 化学工业出版社) 第15-19, 95-97页]
[2]	Schubert E F, Kim J K 2005 Science 308 1274
[3]	Chung W, Yu H J, Park S H, Chun B H, Kim S H 2011 Materials Chemistry and Physics 126 162
[4]	Lin C C, Liu R S 2011 J. Phys. Chem. Lett. 2 1268
[5]	Zhang H C, Ye Y H, Zhang J Y, Cui Y P, Yang B P, Shen L 2012 J. Phys. Chem. C 116 15660
[6]	Lee J, Sundar V C, Heine J R, Bawendi M G, Jensen K F 2000 Adv. Mater. 12 1102
[7]	Chen B K, Zhong H Z, Wang M X, Liu R B, Zou B S 2013 Nanoscale 5 3514
[8]	Song W S, Yang H 2012 Chem. Mater. 24 1961
[9]	Kim J U, Kim Y S, Yang H 2009 Materials Letters 63 614
[10]	Wang X B, Yan X S, Li W W, Sun K 2012 Adv. Mater. 24 2742
[11]	Fang D F, Ding X, Dai R C, Zhao Z, Wang Z P, Zhang Z M 2014 Chin. Phys. B 23 127804
[12]	Xing G C, Chakrabortty S, Chou K L, Mishra N, Huan C H A, Chan Y, Sum T C 2010 Appl. Phys. Lett. 97 061112
[13]	Li M, Sheng Y 2008 Spectroscopy and Spectral Analysis 28 2352 (in Chinese) [李敏, 盛毅 2008 光谱学与光谱分析 28 2352]
[14]	Hazarika A, Pandey A, Sarma D D 2014 J. Phys. Chem. Lett. 5 2208
[15]	Nag A, Cherian R, Mahadevan P, Gopal A V, Hazarika A, Mohan A, Vengurlekar A S, Sarma D D 2010 J. Phys. Chem. C 114 18323
[16]	Jing Q C, Jiao Q C, Yu B L, Hu W S 1979 Colourometry (Beijing: Science Press) p91-93 (in Chinese) [荆其诚, 焦书兰, 喻柏林, 胡维生 1979 色度学 (北京: 科学出版社) 第91-93页]
[17]	Wu Q, Huang X, Liu L, Wang J, Chu M H, Zhang L G, Hou F Q, Liu X Y, Zhao C J, Fan Y, Luo J S, Jiang D P 2007 Chinese Journal of Luminescence 28 736 (in Chinese) [吴庆, 黄先, 刘丽, 王健, 褚明辉, 张立功, 侯凤勤, 刘学彦, 赵成久, 范翊, 罗劲松, 蒋大鹏 2007 发光学报 28 736]
[18]	Stewart A F, Bass M 1980 Appl. Phys. Lett. 37 1040
[19]	Zhang J M, Zhang X K, Zhang J Y 2009 J. Phys. Chem. C 114 3904
[20]	Yang B P, Shen X C, Zhang H C, Cui Y P, Zhang J Y 2013 J. Phys. Chem. C 117 15829
[21]	Leatherdale C A, Woo W K, Mikulec F V, Bawendi M G 2002 J. Phys. Chem. B 106 7619

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Vol. 64, Issue 13 - 2015-07-05

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