Perovskite photovoltaics that use self-assembled monolayers as hole-transport layers are unstable under reverse bias, but the underlying mechanism has not been well understood. This instability is now shown to arise from formamidinium deprotonation triggered by the discontinuities in the self-assembled monolayer on the indium tin oxide substrate.
- Sheng Fu
- Xiaodong Li
- Junfeng Fang