Very Stable and Efficient Tandem Quantum-Dot Light-Emitting Diodes Enabled by IZO-Based Interconnecting Layers

Yuan, Cuixia; Chen, Zinan; Tian, Fengshou; Chen, Shuming

2024-06-04

10.1021/acs.nanolett.4c02021

NANO LETTERS   影响因子和分区

1530-6984

1530-6992

Theoretically, tandem quantum-dot light-emitting diodes (QLEDs) hold great promise for achieving both high efficiency and high stability in display applications. However, in practice, their operational stability remains considerably inferior to that of state-of-the-art devices. In this study, we developed a new tandem structure with optimal electrical and optical performance to simultaneously improve the efficiency and stability of tandem QLEDs. Electrically, upon development of a barrier-free interconnecting layer enabled by an indium-zinc oxide bridging layer and a conductive ZnMgO layer, the driving voltage of the tandem QLEDs is remarkably reduced. Optically, upon development of a top-emitting structure and optimization of the cavity length guided by a theoretical simulation, a maximum light extraction efficiency is achieved. As a result, the red tandem QLEDs exhibit a maximum external quantum efficiency of 49.01% and a T-95 lifetime at 1000 cd/m(2) of >50 000 h, making them one of the most efficient and stable QLEDs ever reported.

tandem quantum-dot light-emitting diodes high efficiency high stability

SCI ; EI

英语

第一 ; 通讯

Science and Technology Foundation of Shenzhen City[62174075] ; National Natural Science Foundation of China["JCYJ20210324105400002","JCYJ20220530113809022","JCYJ20230807093604009"]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001239421200001

AMER CHEMICAL SOC

MATERIALS SCIENCE

Web of Science

Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China

Yuan, Cuixia,Chen, Zinan,Tian, Fengshou,et al. Very Stable and Efficient Tandem Quantum-Dot Light-Emitting Diodes Enabled by IZO-Based Interconnecting Layers[J]. NANO LETTERS,2024,24(24).

Yuan, Cuixia,Chen, Zinan,Tian, Fengshou,&Chen, Shuming.(2024).Very Stable and Efficient Tandem Quantum-Dot Light-Emitting Diodes Enabled by IZO-Based Interconnecting Layers.NANO LETTERS,24(24).

Yuan, Cuixia,et al."Very Stable and Efficient Tandem Quantum-Dot Light-Emitting Diodes Enabled by IZO-Based Interconnecting Layers".NANO LETTERS 24.24(2024).