Low band-gap polymeric photovoltaic devices

摘要: We present results on photovoltaic devices based novel thiophene-isothianaphthene copolymers (PDTI) with π-π* band-gaps ranging from 1.2 eV to 1.8 eV. Single-layer were fabricated films of PDTI doped a soluble fullerene derivative [6,6]-phenyl-C 61 -butyric-acid-methyl-ester (PCBM) as the electron acceptor and blended into poly(methyl methacrylate) enhance film quality. These exhibit spectral response extending infrared are better matched solar spectrum compared standard PPV ones. Such low band-gap materials also make possible construction dye-sensitized that take advantage energy transfer high absorbing dyes host polymer.