Cesium lead halide perovskite materials have attracted considerable attention for potential
applications in lasers, light-emitting diodes, and photodetectors. Here, we provide the
experimental and theoretical evidence for photon recycling in CsPbBr3 perovskite
microwires. Using two-photon excitation, we recorded photoluminescence (PL) lifetimes and
emission spectra as a function of the lateral distance between PL excitation and collection
positions along the microwire, with separations exceeding 100 μm. At longer separations …

Cesium lead halide perovskite materials have recently attracted attention in view of their
optical and electronic properties which make them excellent candidates for potential
applications in lasers, light emitting diodes and photodetectors. In this work, we provide the
experimental and theoretical evidence for sequential photon absorption/re-emission in
CsPbBr3 perovskite microwires. Using two-photon excitation, we recorded PL lifetimes and
emission spectra as a function of the lateral distance between PL excitation and collection …