Morphology and Luminescence Regulation for CsPbBr3 Perovskite Light-Emitting Diodes by Controlling Growth of Low-Dimensional Phases

doi:10.1021/acsami.2c17370

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	Morphology and Luminescence Regulation for CsPbBr3 Perovskite Light-Emitting Diodes by Controlling Growth of Low-Dimensional Phases
	Z. Q. Bao; X. Y. Guo; K. Sun; J. F. Ou; Y. Lv; D. Y. Zou; Y. T. Li; L. Song and X. Y. Liu
	2022
发表期刊	Acs Applied Materials & Interfaces
ISSN	1944-8244
卷号	14 期号:50 页码:56374-56383
摘要	At present, the high defect density and strong nonradiative recombination rate of all-inorganic cesium lead bromide (CsPbBr3) perovskite light-emitting diodes (PeLEDs) seriously inhibit the improvement of their quantum efficiency. In this paper, the addition of a short-chain additive, diethylammonium bromide (DEABr), aims to control the generation of a quasi-2D large n-phase to optimize the surface morphology and construct two-dimensional/three-dimensional (2D/3D) heterojunction per-ovskite structures to enhance the EL efficiency of PeLEDs. Through Kelvin probe force microscopy (KPFM) characterization, we confirmed that the 2D phase grains with a low potential are locally formed on the surface of the perovskite film under the action of DEABr. The existence of the 2D phase effectively improved the surface morphology and suppressed surface defects. In addition, the in situ constructed 2D/3D heterojunction perovskite structure further increases the exciton radiative recombination rate and significantly improves the electroluminescent performance. By optimizing its doping concentration, the optimal all-inorganic PeLED displays a current efficiency (CE) of 30.3 cd A-1, an external quantum efficiency (EQE) of 9.6%, and a maximum brightness of 32,500 cd m-2. According to our results, the formation of 2D structures on the surface of the CsPbBr3 film can improve surface morphology issues and optoelectronic properties of the film.
DOI	10.1021/acsami.2c17370
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收录类别	sci ; ei
语种	英语
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/66859
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Z. Q. Bao,X. Y. Guo,K. Sun,et al. Morphology and Luminescence Regulation for CsPbBr3 Perovskite Light-Emitting Diodes by Controlling Growth of Low-Dimensional Phases[J]. Acs Applied Materials & Interfaces,2022,14(50):56374-56383.
APA	Z. Q. Bao.,X. Y. Guo.,K. Sun.,J. F. Ou.,Y. Lv.,...&L. Song and X. Y. Liu.(2022).Morphology and Luminescence Regulation for CsPbBr3 Perovskite Light-Emitting Diodes by Controlling Growth of Low-Dimensional Phases.Acs Applied Materials & Interfaces,14(50),56374-56383.
MLA	Z. Q. Bao,et al."Morphology and Luminescence Regulation for CsPbBr3 Perovskite Light-Emitting Diodes by Controlling Growth of Low-Dimensional Phases".Acs Applied Materials & Interfaces 14.50(2022):56374-56383.

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