Re-cyclic photophysics in perovskite Cs<sub>4</sub>PbBr<sub>6</sub>
نویسندگان
چکیده
Most photophysical studies in the halide perovskite have focused on characteristics of surface. However, photons generated at surface would be absorbed by same material (re-absorption), and photophysics re-absorbed are rarely studied. Herein, we present our recent observation re-emission (photoluminescence after re-absorption, IR) Cs4PbBr6, which is temporally slower than surface-emission (IS). We performed a characterization power dependence experiment, lifetime measurement to reveal emitting properties Cs4PbBr6. characterized first (re-emission IFR) The analysis IFR revealed that energy intervals between IS final (IR) close integer multiples. Therefore, suggested least number repeated re-absorptions required for generating IR three.
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ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 2021
ISSN: ['1520-8842', '0003-6951', '1077-3118']
DOI: https://doi.org/10.1063/5.0053583