Photon Recycling in CsPbBr₃ All-Inorganic Perovskite Nanocrystals.

ABSTRACT: Photon recycling, the iterative process of re-absorption and re-emission of photons in an absorbing medium, can play an important role in the power-conversion efficiency of photovoltaic cells. To date, several studies have proposed that this process may occur in bulk or thin films of inorganic lead-halide perovskites, but conclusive proof of the occurrence and magnitude of this effect is missing. Here, we provide clear evidence and quantitative estimation of photon recycling in CsPbBr₃ nanocrystal suspensions by combining measurements of steady-state and time-resolved photoluminescence (PL) and PL quantum yield with simulations of photon diffusion through the suspension. The steady-state PL shows clear spectral modifications including red shifts and quantum yield decrease, while

SUBMITTER: van der Laan M 

PROVIDER: S-EPMC8603385 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature