Scientists boost tandem solar cell efficiency to 32.76% using 2-mercaptobenzothiazole

Researchers added 2-mercaptobenzothiazole to the perovskite layer to slow crystallization during deposition.

Prototype two-terminal perovskite/tunnel-oxide-passivated-contact tandem cells achieved a stabilized efficiency of 32.76%.

The prototype retained 91% of its initial efficiency after 1,700 hours of continuous operation.

The molecule’s dual-mode binding with perovskite cations reduced defects and improved long-term performance.