Coherent Carrier Spin Dynamics in FAPbBr 3 Perovskite Crystals.

Autor:	Kirstein E; Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany., Zhukov EA; Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany., Yakovlev DR; Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany., Kopteva NE; Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany., Yalcin E; Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany., Akimov IA; Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany., Hordiichuk O; Department of Chemistry and Applied Biosciences, Laboratory of Inorganic Chemistry, ETH Zürich, CH-8093 Zürich,Switzerland.; Laboratory for Thin Films and Photovoltaics, Empa - Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland., Dirin DN; Department of Chemistry and Applied Biosciences, Laboratory of Inorganic Chemistry, ETH Zürich, CH-8093 Zürich,Switzerland.; Laboratory for Thin Films and Photovoltaics, Empa - Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland., Kovalenko MV; Department of Chemistry and Applied Biosciences, Laboratory of Inorganic Chemistry, ETH Zürich, CH-8093 Zürich,Switzerland.; Laboratory for Thin Films and Photovoltaics, Empa - Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland., Bayer M; Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany.
Jazyk:	angličtina
Zdroj:	The journal of physical chemistry letters [J Phys Chem Lett] 2024 Mar 14; Vol. 15 (10), pp. 2893-2903. Date of Electronic Publication: 2024 Mar 06.
DOI:	10.1021/acs.jpclett.4c00098
Abstrakt:	Coherent spin dynamics of electrons and holes are studied in hybrid organic-inorganic lead halide perovskite FAPbBr 3 bulk single crystals using the time-resolved Kerr ellipticity technique at cryogenic temperatures. The Larmor spin precession of the carrier spins in a magnetic field is monitored to measure the Landé g -factors of electrons (+2.44) and holes (+0.41). These g -factors are highly isotropic. The measured spin dephasing times amount to a few nanoseconds, and the longitudinal hole spin relaxation time is 470 ns. The important role of the strong hyperfine interaction between carrier spins and nuclear spins is demonstrated via dynamic nuclear polarization. At low temperatures, electron and hole spin relaxation predominantly occurs via the hyperfine interaction, whose importance significantly decreases at temperatures above 12 K. We overview the spin dynamics in various lead halide perovskite crystals and polycrystalline films and conclude on their common features provided by charge carrier localization at cryogenic temperatures.
Databáze:	MEDLINE
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