Ampoule synthesis of Na-doped complex bromide Cs2AgBiBr6 with double perovskite structure

Nosirova, N.K.; Kamilov, R.K.; Ibrohimov, M.M.; Lepnev, L.S.; Astafurov, M.O.; Knotko, A.V.; Grigorieva, A.V.

Авторы: Nosirova Nigina K., Kamilov Rustam K., Ibrohimov Maqsudjon M., Lepnev Leonid S., Astafurov Mikhail O., Knotko Alexander V., Grigorieva Anastasia V.
Журнал: Materials
Том: 18
Год издания: 2025
Издательство: MDPI
Местоположение издательства: Basel, Switzerland
Первая страница: 1
Последняя страница: 13
Номер статьи: 1197
DOI: 10.3390/ma18061197
Аннотация: Compounds of general composition A2BIBIIIX6 with a double perovskite (elpasolite) structure are currently considered as an alternative to lead halide perovskites APbX3 in electronics and photovoltaics due to a greater compositional flexibility and a low toxicity. One of such alternatives is a synthesized recently double perovskite Cs2AgNaBiBr6 and a number of various substituted compounds. Close values of radii of silver and sodium cations make promising to tune optoelectronic properties of the double perovskite via a substitution of Ag+ by Na+ if a formation of substitution solid solution Cs2Ag1-xNaxBiBr6 takes place. We explored different possible routes for synthesis of such class of materials, including solid-phase or melt crystallization ampoule syntheses. Varying of heating temperature and duration and using standard cooling processing or a quenching-like process we demonstrate instability of Cs2NaBiBr6 and Na-substituted compounds Cs2-xNaxAgBiBr6 in the temperature range of 300-650°C. It is worth noting that the formation of Cs2Ag1-xNaxBiBr6 solid solutions is more favorable by a solid-phase method.
Добавил в систему: Григорьева Анастасия Вадимовна

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Ampoule synthesis of Na-doped complex bromide Cs2AgBiBr6 with double perovskite structureстатья

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