Peculiarities of photoinduced heating of perovskite nanocrystals with effective anti-Stokes photoluminescence under near-resonant laser excitation

Авторы: Pokryshkin N.S., Sobina I.O., Knysh A.A., Eremina A.S., Syuy A.V., Yakunin V.G., Timoshenko V.Yu
Журнал: Semiconductors
Том: 57
Номер: 7
Год издания: 2023
Издательство: Springer
Местоположение издательства: New York
Первая страница: 567
Последняя страница: 572
DOI: 10.21883/0000000000
Аннотация: The optical properties of a photoluminescent material based on CsPbBr3 perovskite nanocrystals were studied in this work. The laser heating of the obtained samples was studied under three different regimes of laser excitation: the photoluminescence band appears in the Stokes region, in the anti-Stokes region, and coincides with the excitation line. It was found that under laser excitation of a certain wavelength, this material is able to demonstrate predominantly anti-Stokes (upconversion) photoluminescence. A method is proposed for estimating the PL quantum yield from data on absorption, photoheating, and the position of the photoluminescence band of a sample at two different wavelengths. The external photoluminescence quantum yield of CsPbBr3 nanocrystals was experimentally determined to be 91±4%. The results of this work can be useful for the development of optical cooling technology and can be used in the development of laser devices based on perovskite materials.
Добавил в систему: Тимошенко Виктор Юрьевич

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