journal article·2023-06-07

Additive-Stabilized Emission Centers for Blue Perovskite Light-Emitting Diodes

Shibing Zou, Kezhou Fan, Zidan Liu, Ligang Yuan, Qixin Yin, Jinke Bai, Jiarong Wang, Jiong Li, Min Yang, Jianwu Wei, Liqin Wu, Shuang Xu, Qifan Xue, Jiangsheng Xie, Kam Sing Wong, Jianbin Xu, Keyou Yan

ACS Applied Materials & Interfaces· Volume 15· Issue 22
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Abstract

The performance of the blue perovskite light-emitting diodes (PeLEDs) is limited by the low photoluminescence quantum yields (PLQYs) and the unstable emission centers. In this work, we incorporate sodium bromide and acesulfame potassium into a quasi-2D perovskite to control the dimension distribution and promote the PLQYs. Benefiting from the efficient energy cascade channel and passivation, the sky-blue PeLED has an external quantum efficiency of 9.7% and no shift of the electroluminescence center under operation voltages from 4 to 8 V. Moreover, the half lifetime of the devices reaches 325 s, 3.3 times that of control devices without additives. This work provides new insights into enhancing the performance of blue PeLEDs.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Organic Light-Emitting Diodes Research · Quantum Dots Synthesis And Properties

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

Affiliations

School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, P. R. China

Department of Physics and William Mong Institute of Nano Science and Technology, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong, P. R. China

School of Materials, Sun Yat-sen University, Guangzhou 510275 P. R. China

Department of Physics, Harbin Institute of Technology, Harbin 150001, P. R. China

School of optics and photonics, Beijing Institute of Technology, Beijing 100081, P. R. China

Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, New Territories, 999077 Hong Kong, P. R. China

Funding

Guangdong Science and Technology Department · Research Grants Council, University Grants Committee · National Key Research and Development Program of China · National Natural Science Foundation of China · South China University of Technology · Organization Department of the Central Committee of the Chinese Communist Party

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