Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.074
Publication date: 16th December 2024
Metal halide perovskite semiconductors have shown significant potential for use in photovoltaic (PV) devices. While fabrication of perovskite thin-films can be achieved through a variety of different techniques, thermal vapour deposition is particularly promising, allowing for high-throughput fabrication and large-scale production[1]. However, the ability to control the nucleation and growth of these materials, particularly at the charge-transport layer/perovskite interface, is critical to unlocking the full potential of vapour-deposited perovskite PV[2].
In this study, we explore the use of a templating layer to control the growth of co-evaporated perovskite films, and find that such templating reproducibly leads to highly oriented films with identical morphology, crystal structure, and optoelectronic properties, independent of the specific substrate on which the perovskite was deposited[3]. When incorporated into solar cells, devices based on this approach showed reproducible improvements, yielding vapour-deposited FA0.9Cs0.1PbI3-xClx solar cells with steady-state solar-to-electrical power conversion efficiencies over 19.8%. Our findings provide a straightforward and reproducible method of controlling the charge-transport layer/perovskite interface in vapour-deposited perovskite solar cells, further clearing the path toward large-scale fabrication of efficient perovskite optoelectronic devices.
The authors would like to thank the Engineering and Physical Sciences Research Council (UK) (EPSRC) for financial support. L.M.H. acknowledges support through a Hans Fischer Senior Fellowship from the Technical University of Munich’s Institute for Advanced Study, funded by the German Excellence Initiative. S.Y., J.B.P., and M.B.J. would like to thank Nicholas Callaghan for his help designing and manufacturing parts for the custom thermal evaporator used in this work. K.A.E. and Q.Y. acknowledge the support of Rank Prize through a Return to Research grant.
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