Abstract
AbstractMixed Sn–Pb perovskites with narrow bandgaps and high optical absorption coefficients are promising photovoltaic materials. However, the easy oxidation of Sn2+ and fast crystallization of mixed Sn–Pb perovskites still limit the efficiency of mixed Sn–Pb perovskite solar cells (PSCs). Here, an imidazole derivative 2‐(Aminomethyl)imidazole dihydrochloride (2‐AD) to suppress the oxidation of Sn2+ and improve the perovskite film quality through coordination with Sn2+/Pb2+ ions is introduced. The optimized devices show a high power conversion efficiency of 22.31% with outstanding long‐term illumination stability. This work provides an effective strategy to achieve efficient and stable mixed Sn–Pb PSCs.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
