Highly Stable and Efficient Mn2+ Doping Zero-Dimension Cs2ZnxPb1- xCl4 Alloyed Nanorods toward White Electroluminescent Light-Emitting Diodes

Wenda Chen; He Shao; Xiufeng Wu; Lifang Li; Jinyang Zhu; Biao Dong; Lin Xu; Wen Xu; Donglei Zhou; Junhua Hu; Xue Bai; Hongwei Song

doi:10.1021/acs.jpclett.2c00381

Highly Stable and Efficient Mn²⁺ Doping Zero-Dimension Cs₂Zn_xPb_{1- x}Cl₄ Alloyed Nanorods toward White Electroluminescent Light-Emitting Diodes

J Phys Chem Lett. 2022 Mar 17;13(10):2379-2387. doi: 10.1021/acs.jpclett.2c00381. Epub 2022 Mar 7.

Authors

Wenda Chen¹, He Shao¹, Xiufeng Wu¹, Lifang Li¹, Jinyang Zhu², Biao Dong¹, Lin Xu¹, Wen Xu¹, Donglei Zhou¹, Junhua Hu², Xue Bai¹, Hongwei Song¹

Affiliations

¹ State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
² State Centre for International Cooperation on Designer Low-carbon & Environmental Materials, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China.

PMID: 35254835
DOI: 10.1021/acs.jpclett.2c00381

Abstract

Zero-dimensional (0D) crystal structure perovskite NCs have reemerged as promising materials owing to their superior long-term stability; however, their poor conductivity leads to the inferior electrical performances and critically restricts the optoelectronic application of 0D perovskite materials. Herien, the alloyed 0D crystal structure Cs₂Zn_xPb_1-xCl₄ nanorods (NRs) have been synthesized by the modified hot-injection method, which emits bright blue-violet light at 408 nm, and the optimized photoluminescence quantum yield (PLQY) reaches 26%. The Cs₂Zn_0.88Pb_0.12Cl₄ NRs display more excellent air stability and an order of magnitude higher conductivity than CsPbCl₃ nanocube films. In addition, we dope Mn²⁺ ions into the Cs₂Zn_0.88Pb_0.12Cl₄ NRs, which accomplished the optimized PLQY of 40.3% and polarized emission with r = 0.19. The light-emitting diodes (LEDs) based on Mn²⁺ ion doped Cs₂Zn_0.88Pb_0.12Cl₄ NRs exhibit a chromaticity coordinate (CIE) of (0.36, 0.33), an EQE of 0.3%, and a maximum luminance of 98 cd m^-2. This work has enriched ideas for the production of white light perovskite LEDs.