Harnessing Vibrationally Assisted Delayed Fluorescence for Enhanced Energy Transfer in Mn-Doped CsPbBr₃ Nanocrystals

This study explores vibrationally assisted delayed fluorescence (VADF) in Mn-doped CsPbBr 3 nanocrystals using Förster resonance energy transfer (FRET). Mn doping enhances the FRET efficiency significantly due to an increase in host fluorescence efficiency, indicating an increase in the radiative pathways due to VADF. We observed that Mn facilitates efficient back-transfer of charge carriers, improving energy transfer to acceptor molecules such as Rhodamine 6G (R6G). The simplicity of tuning optical properties through Mn doping presents a promising method to enhance the energy efficiency in donor–acceptor systems for optoelectronic applications. However, further research on halide concentrations, acceptor molecules, and electron transfer mechanisms is necessary to optimize these systems for effective light energy harvesting.