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8 March 2021 Anti-Stokes photoluminescence of halide perovskite semiconductors for optical refrigerators
Takumi Yamada, Yoshihiko Kanemitsu
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Proceedings Volume 11702, Photonic Heat Engines: Science and Applications III; 117020C (2021) https://doi.org/10.1117/12.2577968
Event: SPIE OPTO, 2021, Online Only
Abstract
The realization of optical refrigeration in semiconductors has been a long-standing challenge for optical science and semiconductor physics, and many studies have been conducted. Recently, halide perovskite semiconductors have been attracting much attention as a possible candidate for optical refrigerators, because of their extremely high photoluminescence (PL) quantum efficiencies. Here we report anti-Stokes PL properties of halide perovskite bulk crystals and quantum wells. Using PL excitation spectroscopy, we determined the lower limit of external quantum efficiency for laser cooling. The strong electron-phonon coupling and unique thermal properties of perovskites are key factors of efficient anti-Stokes PL processes.
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Takumi Yamada and Yoshihiko Kanemitsu "Anti-Stokes photoluminescence of halide perovskite semiconductors for optical refrigerators", Proc. SPIE 11702, Photonic Heat Engines: Science and Applications III, 117020C (8 March 2021); https://doi.org/10.1117/12.2577968
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KEYWORDS
Perovskite
Semiconductors
Luminescence
Optical semiconductors
External quantum efficiency
Optics
Quantum efficiency
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