Publication date: 15th December 2025
Flexible perovskite solar cells promise lightweight and conformable photovoltaics, but their scalability is limited by low thermal budgets, strained interfaces and stability challenges. In this talk, I will present our recent work on Flash Infrared Annealing (FIRA) as an ultrafast, low-temperature route to fabricate efficient and stable flexible perovskite devices. Sub-second FIRA processing enables rapid solidification of FAPbI₃-based films on polymer substrates, yielding dense microstructures and controlled crystallographic texture. By tailoring the FIRA pulse profile, we induce a strain-stabilized tetragonal FAPbI₃ phase without relying on heavy compositional alloying, and relate this to charge transport and non-radiative recombination at the perovskite/transport-layer interfaces.
I will also briefly discuss our recent FIRA-enabled high-temperature sintering of TiO₂ photoanodes on ultra-thin ITO/polyimide foils for ultralight dye-sensitized solar cells, demonstrating the generality of FIRA for compatible hybrid photovoltaics.
The FIRA process is integrated with flexible-compatible charge-transport layers, passivation schemes and encapsulation, and we assess both operational and mechanical stability under illumination, bias, and temperature. These results position FIRA as a promising platform for scalable manufacturing of flexible perovskite solar cells.[1],[2]
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