Effect of Nanocrystal Size on Anti-Stokes Photoluminescence in Lead Halide Perovskites

We report size-dependent anti-Stokes photoluminescence (ASPL) of methylammonium lead bromide (MALB) perovskite nanocrystals (NCs) under resonant laser excitation. The ASPL efficiency has been found to be stronger for a sample with 6 nm sized MALB NCs. The effect has been explained by the electron–ph...

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Bibliographic Details
Published in:JETP letters 2021-10, Vol.114 (8), p.447-450
Main Authors: Sekerbayev, K. S., Mussabek, G. K., Pokryshkin, N. S., Yakunin, V. G., Taurbayev, Ye. T., Shabdan, Ye, Utegulov, Z. N., Chirvony, V. S., Timoshenko, V. Yu
Format: Article
Language:English
Subjects:
Atomic
Biological and Medical Physics
Biophysics
Lead compounds
Metal halides
Molecular
Nanocrystals
Optical and Plasma Physics
Optics and Laser Physics
Particle and Nuclear Physics
Perovskites
Phonons
Photoluminescence
Physics
Physics and Astronomy
Quantum Information Technology
Radiative recombination
Solid State Physics
Spintronics
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Summary:We report size-dependent anti-Stokes photoluminescence (ASPL) of methylammonium lead bromide (MALB) perovskite nanocrystals (NCs) under resonant laser excitation. The ASPL efficiency has been found to be stronger for a sample with 6 nm sized MALB NCs. The effect has been explained by the electron–phonon interaction, which results in simultaneous photon–phonon absorption followed by the radiative recombination through excitonic states in MALB NCs. The obtained results can be useful for potential application of MALB NCs in optical cooling.
ISSN:0021-3640
1090-6487
DOI:10.1134/S0021364021200029