Investigation on stability and photocatalysis of perovskites 

Institute of Textiles & Clothing, Hong Kong Polytechnic University, Hong Kong, China

Adv. Mater. Lett., 2018, 9 (8), pp 549-552

DOI: 10.5185/amlett.2018.1911

Publication Date (Web): Jun 14, 2018

Copyright © IAAM-VBRI Press

E-mail: tcfeib@polyu.edu.hk

Abstract

Hybrid organic–inorganic perovskite materials have attracted a lot of attention with their facile synthesis process and high efficiency of light absorption. However, poor stability is always a big barrier to commercial development. In this study, a new kind of organic perovskites MA_0.6(AA)_0.4PbBr₃ (AM-PE), which harnesses aniline as a replacement of conventionally used methylamine, was synthesized to increase the stability of MAPbBr₃ (M-PE). The decomposition process of MAPbBr₃ in acetone was investigated. Smaller PbBr₂ particles were formed in the decomposition process, causing the change of photoluminescence emission wavelength from 540 nm to 610 nm. The photocatalysis and photoluminescence properties of M-PE and AM-PE were also compared. As a result, the introduction of aniline reduced the decomposition rate of AM-PE significantly and showed twice the catalysis efficiency of M-PE in the degradation of organic dye - malachite green.

Keywords

Perovskite, photocatalysis, stability, photoluminescence.