Deep-blue random lasing emission coming from the BN-heteroacenes derivatives

Abstract

Blue laser light emission is one of the most desirable and pursued types of laser emission due to its rarity and high demand for blue-emitting organic devices. Despite optimization, however, such systems struggle with limited stability and intense photobleaching and are based on a limited number of compounds. Thus, we present random lasing emission acquired from transparent dye-doped thin layers containing pyrrole[3,2-b]pyrrole-based BN-heteroacenes (BNPPs) derivatives. We show that laser light generation arises from inhomogeneities in the form of surface roughness and nanocrystals of aggregates acting as centers of constructive Mie scattering.