Final Technical Report Monolithic Encapsulation of Perovskite Solar Cells with Transparent Conductive Composites for Long-Term Stability

Summary

This project, supported by a $375,030 budget from DOE and the University of Hawaii, focused on extending the lifespan of perovskite solar cells (PSCs) which typically degrade quickly in humid environments. Researchers developed a novel transparent conductive composite (TCC) encapsulated with an indium zinc oxide (IZO) thin film to protect PSCs. A champion encapsulated PSC maintained over 90% of its initial 21.65% power conversion efficiency for 1,430 hours, a significant improvement over the approximately 288 hours observed for unencapsulated controls. This 5-fold increase in operational stability, achieved through a single IZO/TCC dyad, marks the highest performance for thin-film encapsulated PSCs under accelerated aging conditions (50˚C, 40-60% R.H., 1-sun). The project, which ran from September 2022 to March 2024, lays the groundwork for advanced encapsulation strategies towards the industry target of <1x10^-3 g/m²/day WVTR for 20-25 year lifetimes.

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