Successively Regioselective Electrosynthesis and Electron Transport Property of Stable Multiply Functionalized [60]Fullerene Derivatives

(a) Schematic structure of the n-i-p PSC device with or without (w/o) fullerene derivative as the ETL. (b) − curves of the n-i-p PSC devices without ETL and with PCBM, 2a, and 2b as the ETL measured under illumination of an AM 1.5 solar simulator (100 mW cm^-2) in air. The scanning direction was from open-circuit voltage to short-circuit (reverse), and the scan speed was 100 mV s^-1.