New Lead Bromide Chiral Perovskites with Ultra-Broadband White-Light Emission

Herein, we first presented on the synthesis of two chiral perovskites with white-light emission and a achiral perovskite featuring a spectral blue shift. Moreover, the luminescence mechanism of these perovskites is investigated. The direct signals of free exciton (FE) and self-trapped excitons (STEs) are observed by performing the time-resolved nanosecond transient absorption measurement for our perovskites. This directly verifies that the broad emission indeed originates from FE and STEs. The time-resolved transient emission curves manifest the assignation of two lived components. This work promotes the development of multifunctional application of chiral white-light emissive perovskites.