Broadband emission in a new lead free all-inorganic 3D CsZnCl2I perovskite

Abstract

This contribution reports the deposition of new zinc based lead free all inorganic 3D CsZnCl₂I perovskite thin films using aerosol assisted chemical vapour deposition (AACVD) at 100 °C. Room tempertaure optical measurements performed on the as-deposited thin films showed two absorption peaks. Upon 325 nm excitation, the CsZnCl₂I perovskite thin film showed broad band white light emission having two peaks, which cover the entire visible range of the spectrum. This is the first example of white light emission from 3D all-inorganic lead free mixed halide CsZnCl₂I perovskites.