In-situ Grazing-Incidence X-ray Scattering and Photoluminescence Study of Perovskite Co-deposition
V. Held a, N. Mrkyvkova a b, P. Nádaždy a, K. Vegso a b, A. Vlk c, M. Ledinský c, M. Jergel a b, A. Chumakov d, S.V. Roth d, F. Schreiber e, P. Siffalovic a b
a Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11 Bratislava, Slovakia
b Center for Advanced Materials Application, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11 Bratislava, Slovakia
c Laboratory of Thin Films, Institute of Physics, ASCR, Cukrovarnická 10, 162 00 Prague, Czech Republic
d Photon Science, Deutsches Elektronen-Synchrotron (DESY), Hamburg 22607, Germany
e Institute of Applied Physics, University of Tübingen, 72076 Tübingen, Germany
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV23)
London, United Kingdom, 2023 June 12th - 14th
Organizers: Tracey Clarke, James Durrant and Trystan Watson
Poster, V. Held, 279
Publication date: 30th March 2023

In recent years, metal halide perovskites (PVSKs) have attracted significant attention due to their outstanding opto-electronic properties, low cost, and simple processing. However, the performance of perovskite opto-electronic devices is limited by defects causing the undesirable recombination of charge carriers within the PVSK layers. Therefore, it is necessary to understand the process of perovskite nucleation and formation to challenge the boundaries of their high efficiency. Here, we present a study of both opto-electronic properties and the structure of PVSK thin films during vacuum co-deposition of methylammonium lead iodide (MAPbI3). For this work, we employ a simultaneous measurement of in situ grazing-incidence wide and small-angle X-ray scattering (GIWAXS and GISAXS) and photoluminescence (PL). The non-monotonous character of the PL evolution throughout growth with initial PL emission increase and subsequent decay reveals the formation of defective states correlated to crystalline structure and morphology changes along with the grain formation observed by GIWAXS and GISAXS. This combined real-time study might be a valuable tool for the selection of additives and materials in targeted defect passivation.

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