Publication

Efficient Photon Recycling and Radiation Trapping in Cesium Lead Halide Perovskite Waveguides

Efficient Photon Recycling and Radiation Trapping in Cesium Lead Halide Perovskite Waveguides
Ibrahim Dursun, Yangzi Zheng, Tianle Guo, Michele De Bastiani, Bekir Turedi, Lutfan Sinatra, Md Azimul Haque, Bin Sun, Ayan A. Zhumekenov, Makhsud I. Saidaminov, F. Pelayo García de Arquer, Edward H. Sargent, Tom Wu, Yuri N. Gartstein, Osman M. Bakr, Omar F. Mohammed, Anton V. Malko
ACS Energy Letters, 2018, 3, pp 1492–1498
Ibrahim Dursun, Yangzi Zheng, Tianle Guo, Michele De Bastiani, Bekir Turedi, Lutfan Sinatra, Md Azimul Haque, Bin Sun, Ayan A. Zhumekenov, Makhsud I. Saidaminov, F. Pelayo García de Arquer, Edward H. Sargent, Tom Wu, Yuri N. Gartstein, Osman M. Bakr, Omar
Photon recycling, Perovskites
2018

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, the PL spectrum develops a red-shifted emission peak accompanied by an appearance of well-resolved rise times in the PL kinetics. We developed quantitative modeling that accounts for bimolecular recombination and photon recycling within the microwire waveguide and is sufficient to account for the observed decay modifications. It relies on a high radiative efficiency in CsPbBr3 perovskite microwires and provides crucial information about the potential impact of photon recycling and waveguide trapping on optoelectronic properties of cesium lead halide perovskite materials.​
DOI: 10.1021/acsenergylett.8b00758