N. S. Pokryshkin, I. O. Sobina, A. A. Knysh, A. S. Eremina, A. V. Syuy, V. G. Yakunin, V. Yu. Timoshenko
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引用次数: 0
Abstract
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.
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Publishes the most important work in semiconductor research in the countries of the former Soviet Union. Covers semiconductor theory, transport phenomena in semiconductors, optics, magnetooptics, and electrooptics of semiconductors, semiconductor lasers and semiconductor surface physics. The journal features an extensive book review section.
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