High-performance bulk-heterojunction (BHJ) polymer solar cells (PSCs) processed from non-halogenated solvents with power conversion efficiency values over 7% are demonstrated for the first time. The effects of these solvents on the morphology, charge mobility, and PSC device performance have been systematically studied. The general applicability of these non-halogenated solvents to diverse polymer/fullerene systems has also been demonstrated.

A facile and effective approach to enhance the performance and stability of perovskite solar cells is proposed by using a solution-processed cetyltrimethylammonium bromide (CTAB)-doped [6,6]-phenyl-C₆₁-butyric acid methyl ester (PC₆₁BM) film as a cathode interfacial layer.