Light-Induced Surface Recombination Suppression, Carrier Lifetime Improvement, and Deep Defect Formation in Lead Halide Perovskites

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10508666" target="_blank" >RIV/00216208:11320/25:10508666 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Mbmto-U01l" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Mbmto-U01l</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/lpor.202401904" target="_blank" >10.1002/lpor.202401904</a>

Result language
angličtina
Original language name
Light-Induced Surface Recombination Suppression, Carrier Lifetime Improvement, and Deep Defect Formation in Lead Halide Perovskites
Original language description
Lead halide perovskites are promising materials in a wide range of optoelectronic devices. The internal instabilities of perovskites under illumination, however, hinder their application. Here, light-induced changes in CH(3)NH(3)PbBr(3) single crystals are studied, focusing on charge carrier transport properties and deep defect evolution. Using laser-induced transient current technique measurements under steady-state illumination enables the distinction of electron and hole conductivity. An improvement in charge carrier collection is observed stemming from reduced surface recombination and increased hole lifetime. Surprisingly, despite the overall optimization of carrier transport, the simultaneous formation of deep defects under illumination is recorded via photo-thermal deflection spectroscopy. Empirical models are proposed to rationalize all light-induced changes. The explanations are based on strong electron trapping, ion migration, and passivation of strong recombination centers by light-induced deep defects.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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