DataVXACS Applied Electronic MaterialsPaper
journal article·2021-05-25

Highly Efficient CsPbBr3 Perovskite Nanocrystal Light-Emitting Diodes with Enhanced Stability via Colloidal Layer-by-Layer Deposition

Binze Zhou, Pengfei Wang, Shicai Geng, Min Wang, Le Qin, Yanwei Wen, Rong Chen

ACS Applied Electronic Materials· Volume 3· Issue 5
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Source abstract

Abstract

A facile colloidal layer-by-layer deposition of amorphous AlOx is applied on the CsPbBr3 perovskite nanocrystals (PNCs). The CsPbBr3 PNCs show improved photoluminescence intensity and excellent water resistance due to the fine control on the thickness of AlOx at the nanoscale. The irradiation induced by the mixing of the CsPbBr3 and CsPbI3 PNCs is well suppressed due to the inhibition of anion exchange. Moreover, the AlOx-treated CsPbBr3 PNCs are integrated into a light-emitting diode and the external quantum efficiency (EQE) is improved to 6.05% with a high luminance of 32,747 cd/m2 due to optimized band alignment. Additionally, the luminance T50 lifetime of the fabricated device is prolonged by more than 4 times. This work provides a solution-compatible modification of colloidal PNCs to achieve high luminescence and stability, which is promising in the practical applications of PNC-based devices.
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Research context

NanomaterialsElectronic materialsMaterials processing

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Luminescence Properties of Advanced Materials

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

Affiliations

State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China

School of Optical and Electronic Information, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, People’s Republic of China

State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Huazhong University of Science and Technology Research Institute, Shenzhen 518067, China

Funding

Natural Science Foundation of Hubei Province · National Natural Science Foundation of China · Natural Science Foundation of Shenzhen

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