Stable organic dyes based on the benzo[1,2-b:4,5-b′]dithiophene donor for efficient dye-sensitized solar cells

Abstract

A stable sensitizer incorporating the benzo[1,2-<italic>b</italic>:4,5-<italic>b</italic>′]dithiophene donor was used in dye-sensitized solar cells, showing the highest efficiency reported for amine-free organic dyes.