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- W3040550693 abstract "Formamidinium tin triiodide (FASnI3) is a strong contender for sustainable harvesting of solar energy and further optoelectronic applications. So far, only a few studies have considered its fundamental structure–property relationships, given the challenge of ensuring a high material quality. In a concerted effort, we here study high-quality FASnI3 single crystals through a combination of X-ray crystallography, density-functional-theory-based electronic structure calculations, and photoluminescence spectroscopy from room temperature down to 4 K. The luminescence exhibits irregular trends upon cooling with a generally strong intensity increase, but a range of negative thermal quenching, leading to an intensity maximum around 185 K which is absent in low-quality samples. Differences in the photoluminescence peak position and density-functional-theory-calculated band-gap energies highlight the importance of dynamic processes to the observable properties of FASnI3. The presented data offer deeper insight into the temperature-dependent characteristics of this halide perovskite and present opportunities for future exploration of its optoelectronic properties." @default.
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- W3040550693 date "2020-07-07" @default.
- W3040550693 modified "2023-10-18" @default.
- W3040550693 title "Negative Thermal Quenching in FASnI<sub>3</sub> Perovskite Single Crystals and Thin Films" @default.
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- W3040550693 doi "https://doi.org/10.1021/acsenergylett.0c01166" @default.
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