Bottom-up synthesis of bright fluorescent, moisture-resistant methylammonium lead bromide@poly(3-bromothiophene)

Abstract

Colloidal organic-inorganic lead halide perovskites have gained tremendous attention due to their excellent optical properties and promising future in optoelectronic applications. However, the lack of large scale synthesis methods and structural instability in moisture conditions restrict their practical applications. We report, for the first time, a gram-scale aqueous synthesis of MAPbBr(3) (MA = CH3NH3+) using PbCO3, bottom-up synthesis of MAPbBr(3) NCs and in situ bottom-up synthesis of MAPbBr(3)@poly(3-bromothiophene) nanocomposite. The synthesized nanocomposite material exhibits bright green fluorescence and excellent water-resistivity. Together, the polymer-based bottom-up and in situ encapsulation strategy of MAPbBr(3) NCs will pave the way for synthesizing other lead halide water-resistant perovskites that will be used in thin-film based light-emitting devices.