5-Ammoniumvaleric acid stabilized mixed-dimensional perovskite submicron platelets with white light emission

Yamin Shi; Jiarui Hu; Jian Chen; Yaxin Xu; Wantian Yang; Junnian Chen; Yunbin He

doi:10.1039/d0na00462f

5-Ammoniumvaleric acid stabilized mixed-dimensional perovskite submicron platelets with white light emission

Nanoscale Adv. 2020 Aug 21;2(10):4822-4829. doi: 10.1039/d0na00462f. eCollection 2020 Oct 13.

Authors

Yamin Shi¹, Jiarui Hu¹, Jian Chen¹, Yaxin Xu¹, Wantian Yang¹, Junnian Chen¹, Yunbin He¹

Affiliation

¹ Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University Wuhan 430062 P. R. China chenjunnian910@hubu.edu.cn ybhe@hubu.edu.cn.

Abstract

Low-dimensional Pb-Br and Pb-Cl perovskite single crystals have aroused considerable attention due to their broadband white-light emission. But their synthesis involving halogenation of organic amines, dissolution of lead oxide and a slow cooling process is quite complicated. Herein, we report white light emission from mixed-dimensional AVA _x (MAPbCl₃) perovskite submicron platelets formed by one-step solution processing. It is found that the presence of 5-ammoniumvaleric acid (5-AVA) with a zwitterionic functional group is crucial for modulating the morphology and structural dimensionality of perovskites. Importantly, AVA _x (MAPbCl₃) perovskites exhibit distinctive structural dimensionality dependent broadband emission, indicating the formation of self-trapped excited states. The AVA₂(MAPbCl₃) perovskite exhibits white-light emission with a color rendering index (CRI) of 85 and a correlated color temperature (CCT) of 8624 K, yielding "cold" white light. Moreover, the mixed-dimensional perovskite exhibits good stability for more than 30 days. With this report, we aim to provide a facile approach for synthesizing stable low-dimensional perovskite nanostructures for making advanced optoelectronic devices.