What is it about?

Metal halide perovskites have made tremendous development owing to their remarkable optoelectronic properties, low-cost solution processing, and exceptional power conversion efficiency. However, the toxicity of lead element in perovskite limits their commercialization. We have prepared an environmentally friendly and efficient tin-based perovskite solar cell by interfacial modification with fullerene derivatives.

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Why is it important?

We found the fullerene derivatives can strongly anchor on the perovskite surface via coordination interactions, which not only reinforces the passivation of the trap-state in perovskite film, but also regulates the interface energy level alignment to reduce non-radiative recombination. The resulting devices have achieved a champion efficiency of 14.14% with negligible hysteresis, and are maintained over 95% of their initial efficiency under continuous one-sun illumination for 1000 h.


The interface modification strategy improves the efficiency and stability of tin perovskite solar cells significantly, creating opportunities for the development of environmentally friendly perovskite photovoltaic technology.

Bo Li
City University of Hong Kong

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This page is a summary of: Efficient and Stable Tin Perovskite Solar Cells by Pyridine‐Functionalized Fullerene with Reduced Interfacial Energy Loss, Advanced Functional Materials, July 2022, Wiley, DOI: 10.1002/adfm.202205870.
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