Anisotropic emission of orientation-controlled mixed-dimensional perovskites for light-emitting devices

Yuhui Qi; Yang Liu; Chen Lin; Yunzhou Deng; Peng Bai; Yunan Gao; Haiming Zhu; Zhizhen Ye; Yizheng Jin

Journal of Materiomics (Jul 2023)

Anisotropic emission of orientation-controlled mixed-dimensional perovskites for light-emitting devices

Yuhui Qi,
Yang Liu,
Chen Lin,
Yunzhou Deng,
Peng Bai,
Yunan Gao,
Haiming Zhu,
Zhizhen Ye,
Yizheng Jin

Affiliations

Yuhui Qi: Key Laboratory of Excited-State Materials of Zhejiang Province, State Key Laboratory of Silicon Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, China
Yang Liu: State Key Laboratory of Silicon Materials, School of Materials and Engineering, Zhejiang University, Hangzhou, 310027, China; Wenzhou Key Laboratory of Novel Optoelectronic and Nano Materials, Institute of Wenzhou, Zhejiang University, Wenzhou, 325006, China; Corresponding author. State Key Laboratory of Silicon Materials, School of Materials and Engineering, Zhejiang University, Hangzhou, 310027, China.
Chen Lin: State Key Laboratory of Silicon Materials, School of Materials and Engineering, Zhejiang University, Hangzhou, 310027, China
Yunzhou Deng: State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Zhejiang University, Hangzhou, 310027, China
Peng Bai: China State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing, 100871, China
Yunan Gao: China State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing, 100871, China
Haiming Zhu: Key Laboratory of Excited-State Materials of Zhejiang Province, State Key Laboratory of Silicon Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, China
Zhizhen Ye: State Key Laboratory of Silicon Materials, School of Materials and Engineering, Zhejiang University, Hangzhou, 310027, China; Wenzhou Key Laboratory of Novel Optoelectronic and Nano Materials, Institute of Wenzhou, Zhejiang University, Wenzhou, 325006, China; Corresponding author. State Key Laboratory of Silicon Materials, School of Materials and Engineering, Zhejiang University, Hangzhou, 310027, China.
Yizheng Jin: Key Laboratory of Excited-State Materials of Zhejiang Province, State Key Laboratory of Silicon Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, China; Corresponding author.

Journal volume & issue: Vol. 9, no. 4
pp. 762 – 767

Abstract

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Perovskite light-emitting diodes (PeLEDs) are attracting increasing attention owing to their impressive efficiencies and high luminance across the full visible light range. Further improvement of the external quantum efficiency (EQE) of planar PeLEDs is limited by the light out-coupling efficiency. Introducing perovskite emitters with directional emission in PeLEDs is an effective way to improve light extraction. Here, we report that it is possible to achieve directional emission in mixed-dimensional perovskites by controlling the orientation of the emissive center in the film. Multiple characterization methods suggest that our mixed-dimensional perovskite film shows highly orientated transition dipole moments (TDMs) with the horizontal ratio of over 88%, substantially higher than that of the isotropic emitters. The horizontally dominated TDMs lead to PeLEDs with exceptional high light out-coupling efficiency of over 32%, enabling a high EQE of 18.2%.

Published in Journal of Materiomics

ISSN: 2352-8478 (Print); 2352-8486 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.sciencedirect.com/journal/journal-of-materiomics

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