Embedding an electron donor or acceptor into naphtho[2,1-b:3,4-b′]dithiophene based organic sensitizers for dye-sensitized solar cells

An electron donor and acceptor, respectively, is embedded into naphtho[2,1-b:3,4-b']dithiophene based organic sensitizers to tune their optoelectronic properties. The DSSC based on FNE52 containing an auxiliary electron acceptor displays a maximum power conversion efficiency of 8.2% and good long-term stability.