Transparent quantum dot light-emitting diodes with a current focusing structure

Author:

Xiang Guohong123ORCID,Ma Jingrui13ORCID,Qu Xiangwei13ORCID,Wang Kai13ORCID,Kwok Hoi Sing2ORCID,Sun Xiao Wei13ORCID

Affiliation:

1. Institute of Nanoscience and Applications, and Department of Electrical and Electronic Engineering, Southern University of Science and Technology 1 , Shenzhen 518055, China

2. State Key Laboratory of Advanced Displays and Optoelectronics Technologies, the Hong Kong University of Science and Technology 2 , Hong Kong, China

3. Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology), Ministry of Education, Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting, Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, Shenzhen Engineering Research Center for High Resolution Light Field Display and Technology and Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting, Southern University of Science and Technology 3 , Shenzhen 518055, China

Abstract

We report transparent quantum dot light-emitting diodes with a current focusing structure. By depositing a SiO2 thin film to form the current focusing structure, the DC density and luminance significantly increased to over 8700 mA/cm2 and 360 000 cd/m2, respectively. The emission spectra and current densities as functions of SiO2 thickness and aperture width have been investigated and discussed. This current focusing design is proved effective and can be further applied to other planar light-emitting diode devices.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting

Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting

Shenzhen Science and Technology Program

Shenzhen Development and Reform Commission

Publisher

AIP Publishing

Subject

Physics and Astronomy (miscellaneous)

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