Vacuum Deposited Perovskite Solar Cells, Benefits and Challenges.
Henk Bolink a
a Instituto de Ciencia Molecular, ICMol, Universidad de Valencia
Invited Speaker Session, Henk Bolink, presentation 104
Publication date: 6th February 2024

Of the potential vacuum techniques for perovskite synthesis, the most widely reported is thermal co-sublimation. This is done by subliming perovskite precursors synchronously, and controlling the stoichiometry by in-situ rate monitoring. Thermal evaporation is a scalable deposition method with demonstrations of high-efficiency on both small- and large- area devices as well as modules. A notable advantage of this technique is its additive nature in that there is no processing limit to film thickness, and thermal evaporation sources can be sequentially positioned in a process line to increase deposition speed and/or tune composition. We will report on the progress on vapor phase deposited perovskites, including novel low vacuum based deposition methods such as close space sublimation. Using substrate configuration we optimize the incoupling of sunlight which leads to current densities very close to the detailed balance limit. We have prepared semi-transparent with varying perovskite thickness allowing for their use in building integrated PV as well as for bi-facial solar cells.

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