Biuret was introduced to regulate the crystallization process and passivate the defects of perovskite films, leading to MAPbI ₃ solar cells with efficiency over 21% and enhanced thermal stability.

We demonstrate self-assembled naphthalimide derivatives as an efficient electron extraction contact for n-i-p structured perovskite solar cells.

A new facile fused tetraphenylethylene–triphenylamine hole transporting material has been developed, which shows obviously higher performance than the non-fused counterpart in perovskite solar cells.