Citation: Peifeng Li, Jie Wang, Hong Chen, Hao Zhang, Cheng Li, Wenjie Xu, Renzhi Li, Lin Zhu, Nana Wang, Jianpu Wang. Multiple-quantum-well perovskite for hole-transport-layer-free light-emitting diodes[J]. Chinese Chemical Letters, ;2022, 33(2): 1017-1020. doi: 10.1016/j.cclet.2021.06.084 shu

Multiple-quantum-well perovskite for hole-transport-layer-free light-emitting diodes

Peifeng Li ^a ,
Jie Wang ^a ,
Hong Chen ^{a, *,} ,
Hao Zhang ^a ,
Cheng Li ^{b, c} ,
Wenjie Xu ^a ,
Renzhi Li ^a ,
Lin Zhu ^{a, *,} ,
Nana Wang ^{a, *,} ,
Jianpu Wang ^a

a.
Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), Nanjing 211816, China
b.
School of Electronic Science and Engineering, Xiamen University, Xiamen 361005, China
c.
Future Display Institute of Xiamen, Xiamen 361005, China

iamhchen@njtech.edu.cn

iamlzhu@njtech.edu.cn

iamnnwang@njtech.edu.cn

Received Date: 11 June 2021
Revised Date: 24 June 2021
Accepted Date: 29 June 2021
Available Online: 3 July 2021

Figures(4)

We demonstrate hole-transport-layer-free light-emitting diodes (LEDs) based on solution-processed multiple-quantum-well (MQW) perovskite. The MQW perovskite can self-assemble to a unique structure of vertically graded distribution with two-dimensional layered perovskite covered by three-dimensional-like perovskite at top, which can naturally form a barrier of electron transporting to the anode interface, thereby enhancing the charge capture efficiency. This leads to hole-transport-layer-free MQW perovskite LEDs reaching an external quantum efficiency (EQE) of 9.0% with emission peak at 528 nm, which is over 6 times of LEDs based on three-dimensional perovskite with the same device structure, representing the record EQE of hole-transport-layer-free perovskite LED.
- Perovskite light-emitting diodes,
- Hole-transport-layer-free device,
- Multiple-quantum-well perovskite,
- Green emission
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