journal article·2020-06-01Open access

High performance top-emitting quantum dot light-emitting diodes with interfacial modification

Shihao Ding, Weigao Wang, Xiangtian Xiao, Xiangwei Qu, Zhenghui Wu, Bing Xu, Shuming Chen, Kai Wang, Xiao Wei Sun

AIP Advances· Volume 10· Issue 6

Abstract

In this paper, we report high performance top-emitting quantum dot light-emitting diodes (TE-QLEDs) with an interfacial modification layer. The specular metal bottom electrode was modified by an interfacial layer to improve the wettability of the aqueous solution on a metal electrode. By doing so, the potential barrier between the metal electrode and hole injection layer is decreased and the hole injection is enhanced. The capacitance analysis was used to understand the charge transfer process of the TE-QLEDs. The result showed that the indium tin oxide (ITO) interface layer is the best among NiOx, MoO3, and ITO. As a consequence, the red TE-QLEDs with an ITO interfacial modification layer show a maximum luminance and maximum external quantum efficiency of 18 880 cd/m2 and 11.8%, respectively. Our works indicate that the interfacial modification with metal oxides is an effective approach for high performance TE-QLEDs.
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Research context

OpenAlex topics: Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films · ZnO doping and properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Shenzhen Planck Innovation Technologies Co. Ltd. 1 , No. 18 Huancheng South Road, Longgang District, Shenzhen 518129, China

Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting, Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting, and Department of Electrical and Electronic Engineering, Southern University of Science and Technology 2 , Shenzhen 518055, China

College of Optoelectronic Engineering, Shenzhen University 3 , Shenzhen 518060, China

Funding

Key-Area Research and Development Program of Guangdong Province · Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting · Distinguished Young Scholar of Natural Science Foundation of Guangdong · Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting · Shenzhen Peacock Team Project · Shenzhen Innovation Project · Ministry of Science and Technology of the People’s Republic of China · National Natural Science Foundation of China

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