Version 2 2022-12-16, 21:14Version 2 2022-12-16, 21:14
Version 1 2022-12-16, 16:37Version 1 2022-12-16, 16:37
journal contribution
posted on 2022-12-16, 21:14authored byVladimir Held, Nada Mrkyvkova, Peter Nádaždy, Karol Vegso, Aleš Vlk, Martin Ledinský, Matej Jergel, Andrei Chumakov, Stephan V. Roth, Frank Schreiber, Peter Siffalovic
The efficiency of perovskite-based solar cells has increased
dramatically
over the past decade to as high as 25%, making them very attractive
for commercial use. Vapor deposition is a promising technique that
potentially enables fabrication of perovskite solar cells on large
areas. However, to implement a large-scale deposition method, understanding
and controlling the specific growth mechanisms are essential for the
reproducible fabrication of high-quality layers. Here, we study the
structural and optoelectronic kinetics of MAPbI3, employing in-situ photoluminescence (PL) spectroscopy and grazing-incidence
small/wide-angle X-ray scattering (GI-SAXS/WAXS) simultaneously during
perovskite vapor deposition. Such a unique combination of techniques
reveals MAPbI3 formation from the early stages and uncovers
the morphology, crystallographic structure, and defect density evolution.
Furthermore, we show that the nonmonotonous character of PL intensity
contrasts with the increasing volume of the perovskite phase during
the growth, although bringing valuable information about the presence
of defect states.