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Spatial localization of defects in halide perovskites using photothermal deflection spectroscopy
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SYSNO ASEP 0583027 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Spatial localization of defects in halide perovskites using photothermal deflection spectroscopy Author(s) Vlk, Aleš (FZU-D) ORCID
Remeš, Zdeněk (FZU-D) RID, ORCID
Landová, Lucie (FZU-D) ORCID
Ridzoňová, Katarína (FZU-D) ORCID
Hlaváč, Robert (FZU-D) ORCID
Fejfar, Antonín (FZU-D) RID, ORCID, SAI
Ledinský, Martin (FZU-D) RID, ORCID, SAINumber of authors 7 Source Title Journal of Physical Chemistry Letters. - : American Chemical Society - ISSN 1948-7185
Roč. 15, č. 5 (2024), s. 1273-1278Number of pages 6 s. Language eng - English Country US - United States Keywords bulk defects ; surface defects ; photothermal deflection spectroscopy ; Urbach energy Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects LUASK22202 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2018110 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 001159155800001 EID SCOPUS 85184615584 DOI https://doi.org/10.1021/acs.jpclett.3c02966 Annotation Photothermal deflection spectroscopy (PDS) emerges as a highly sensitive noncontact technique for measuring absorption spectra and serves for studying defect states within semiconductor thin films. In our study, we applied PDS to methyl-ammonium lead bromide single crystals. By analyzing the frequency dependence of the PDS spectra and the phase difference of the signal, we can differentiate between surface and bulk deep defect absorption states. This methodology allowed us to investigate the effects of bismuth doping and light-induced degradation. The identified absorption states are attributed to MA+ vibrational states and structural defects, and their influence on the nonradiative recombination probability is discussed. This distinction significantly enhances our capability to characterize and analyze perovskite materials at a deeper level. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2025 Electronic address https://hdl.handle.net/11104/0352932
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