Suppressing interfacial nonradiative recombination with an acetate interlayer for high-performance pure blue perovskite LEDs

Ziqiang Chen; Minfei Lan; Zhirui Liu; Lanlan Zhai; Qian Miao; He Huang; Guoku Chao; Yun Yang; Jun Zou; Chao Zou

doi:10.1039/D6CC01005A

Suppressing interfacial nonradiative recombination with an acetate interlayer for high-performance pure blue perovskite LEDs

Ziqiang Chen,

^a Minfei Lan,^a Zhirui Liu,^a Lanlan Zhai,

*^a Qian Miao,*^a He Huang,

^a Guoku Chao,^a Yun Yang,

^a Jun Zou

^bc and Chao Zou

*^a

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* Corresponding authors

^a College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325027, China
E-mail: zhaill@wzu.edu.cn, miaoqian@wzu.edu.cn, zouchao@wzu.edu.cn

^b Institute of New Materials & Industrial Technology, Wenzhou University, Wenzhou 325024, China

^c School of Science, Shanghai Institute of Technology, Shanghai 201418, China

Abstract

Rapid crystallization kinetics of quasi-2D perovskite leads to interfacial defects, which exacerbates nonradiative recombination at the bottom of the perovskite film. Here, CH₃COOLi is intercalated prior to perovskite film. Benefiting from their dual effects of retarding the crystallization rate and reducing the formation of n = 1 phase, quasi-2D blue PeLED achieves a peak external quantum efficiency of 9.9% at 474 nm.

Chemical Communications

Suppressing interfacial nonradiative recombination with an acetate interlayer for high-performance pure blue perovskite LEDs

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Suppressing interfacial nonradiative recombination with an acetate interlayer for high-performance pure blue perovskite LEDs

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