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• W2895601504 abstract "We have investigated temperature and excitation wavelength-dependent luminescent properties of CH3NH3PbBr3 (MAPbBr3) perovskite crystal using steady-state and time-resolved photoluminescence (PL) spectroscopy. Optical spectroscopic results indicate that the PL intensity, peak wavelength, and full width at half maximum are jumped due to the phase transition from orthorhombic to tetragonal and cubic. As temperature increases, the peaks of above-bandgap and intrinsic PL have blueshift and redshift, respectively. The above-bandgap PL emerges under one-photon laser excitation and vanishes under the excitation of near-infrared femtosecond laser due to reabsorption. The initial redshift of PL peak and lifetime change at various wavelengths reveals the existence of a trap-assisted excitonic state. It is found that upconversion PL in all phases is composed of a photoinduced thermal-assisted and an intrinsic excitonic state, which produces the observation of biexponential dynamics. Our results can facilitate the understanding of the thermal effect of exciton recombination in hybrid perovskite crystal." @default.
• W2895601504 created "2018-10-12" @default.
• W2895601504 creator A5015195367 @default.
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• W2895601504 date "2018-10-05" @default.
• W2895601504 modified "2023-09-27" @default.
• W2895601504 title "Temperature and excitation wavelength-dependent photoluminescence of CH₃NH₃PbBr₃ crystal" @default.
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• W2895601504 doi "https://doi.org/10.1364/ol.43.004923" @default.
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