Negative Thermal Quenching in FASnI(3) Perovskite Single Crystals and Thin Films

Simon Kahmann, Olga Nazarenko, Shuyan Shao, Oleh Hordiichuk, Mikael Kepenekian, Jacky Even, Maksym Kovalenko, Graeme R. Blake*, Maria A. Loi*

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

11 Citaten (Scopus)
37 Downloads (Pure)


Formamidinium tin triiodide (FASnI(3)) 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 FASnI(3) 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 FASnI(3). 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.

Originele taal-2English
Pagina's (van-tot)2512-2519
Aantal pagina's8
TijdschriftACS Energy Letters
Nummer van het tijdschrift8
StatusPublished - 14-aug-2020

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