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 ,-bis (tolyl)-,-diphenyl-1,-biphenyl-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 (). 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
Full Article | PDF ArticleMore Like This
Fei Chen, Li-Jin Wang, Xu Li, Zhen-Bo Deng, Feng Teng, and Ai-Wei Tang
Opt. Express 28(5) 6134-6145 (2020)
Qianqian Huang, Jiangyong Pan, Yuning Zhang, Jing Chen, Zhi Tao, Chao He, Kaifeng Zhou, Yan Tu, and Wei Lei
Opt. Express 24(23) 25955-25963 (2016)
Young Pyo Jeon, Sung June Park, and Tae Whan Kim
Opt. Mater. Express 2(5) 663-670 (2012)