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, Mohammed Haque, Bin Sun, Ayan A. Zhumekenov, Makhsud I. Saidaminov, F. Pelayo Garcia de Arquer, Edward H. Sargent, Tao Wu, Yuri N Gartstein, Osman Bakr, Omar F. Mohammed, Anton V. Malko

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

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.
Original languageEnglish (US)
Pages (from-to)1492-1498
Number of pages7
JournalACS Energy Letters
Volume3
Issue number7
DOIs
StatePublished - May 25 2018

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