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Impact of cation multiplicity on halide perovskite defect densities and solar cell voltages
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SYSNO ASEP 0541706 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Impact of cation multiplicity on halide perovskite defect densities and solar cell voltages Author(s) Ledinský, Martin (FZU-D) RID, ORCID, SAI
Vlk, Aleš (FZU-D) ORCID
Schönfeldová, Tereza (FZU-D)
Holovský, Jakub (FZU-D) RID, ORCID
Aydin, E. (SA)
Dang, H.X. (SA)
Hájková, Zdeňka (FZU-D) RID, ORCID
Landová, Lucie (FZU-D) ORCID
Valenta, J. (CZ)
Fejfar, Antonín (FZU-D) RID, ORCID, SAI
De Wolf, S. (SA)Number of authors 11 Source Title Journal of Physical Chemistry C. - : American Chemical Society - ISSN 1932-7447
Roč. 124, č. 50 (2020), s. 27333-27339Number of pages 7 s. Language eng - English Country US - United States Keywords optical-absorption edge ; temperature-dependence ; efficiency ; silicon ; lengths ; luminescence Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects LM2018110 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GJ17-26041Y GA ČR - Czech Science Foundation (CSF) EF16_019/0000760 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000608876900008 EID SCOPUS 85097802922 DOI 10.1021/acs.jpcc.0c08193 Annotation Metal-halide perovskites feature very low deep-defect densities, thereby enabling high operating voltages at the solar cell level. Here, by precise extraction of their absorption spectra, we find that the low deep-defect density is unaffected when cations such as Cs+ and Rb+ are added during the perovskite synthesis. By comparing single crystals and polycrystalline thin films of methylammonium lead iodide/bromide, we find these defects to be predominantly localized at surfaces and grain boundaries. Furthermore, generally, for the most important photovoltaic materials, we demonstrate a strong correlation between their Urbach energy and open-circuit voltage deficiency at the solar cell level. Through external quantum yield photoluminescence efficiency measurements, we explain these results as a consequence of nonradiative open-circuit voltage losses in the solar cell. Finally, we define practical power conversion efficiency limits of solar cells by taking into account the Urbach energy. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2022 Electronic address https://doi.org/10.1021/acs.jpcc.0c08193
Number of the records: 1