Novel A-π-D-A organic dyes for better photovoltaic performance

Novel A-π-D-A type indole-based metal-free organic dyes have been designed and synthesized for dye-sensitized solar cells (DSSCs). In-T-2C dye-based DSSC device exhibited the highest efficiency ( η ) of 4.12% compared to In-B-C dye ( η = 0.38%).