https://www.sciencedaily.com/releases/2019/04/190412101312.htm

Perovskite-based solar cells are the fastest-advancing solar technology to date. Since they were first used in 2009, perovskite solar cells have achieved high efficiencies (over 22% under standard solar irradiation) at low production costs. Although most of the perovskite components are optimized, there's still room for improvement. Especially in reference to the Hole Transport Materials (HTMs) employed.

The collaboration, among researchers from ICIQ's Palomares and Vidal groups, the Physical Chemistry of Surfaces and Interfaces group at the Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and IMDEA Nanocienca, sheds light on the reasons behind the differences observed in perovskite solar cells' performance by comparing four different HTMs that present close chemical and physical properties.