Highly sensitive and selective ammonia gas sensor based on FAPbCl3 lead halide perovskites

Авторы: Parfenov Aleksei A., Yamilova Olga R., Gutsev Lavrenty G., Sagdullina Diana K., Novikov Artyom V., Ramachandran Bala R., Stevenson Keith J., Aldoshin Sergey M., Troshin Pavel A.
Журнал: J. Mater. Chem. C
Том: 9
Номер: 7
Год издания: 2021
Первая страница: 2561
Последняя страница: 2568
DOI: 10.1039/d0tc03559a
Аннотация: Organic–inorganic hybrid halide perovskites exhibit a wide range of unique optoelectronic propertiesthat can be applied to a variety of semiconducting photoelectronic devices. There is also a growinginterest in using perovskites as sensor materials for detecting various gas-phase analytes. In the presentwork, we report the design and investigation of a gas sensor based on formamidinium lead chloride(FAPbCl3), which demonstrated a strong and highly selective response towards ammonia. Theseobservations were confirmed by our calculations to be due to a ‘‘lock-and-key’’ mechanism of theammonia molecule filling the chlorine-vacancy defect, which effectively healed the carrier trap createdby such a defect. A good reversibility and operational stability of the devices at room temperature wasalso observed, suggesting that complex lead halides are highly promising families of materials for gassensor and electronic nose applications.
Добавил в систему: Алдошин Сергей Михайлович

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