Photocurrent response wavelength up to 1.1μm from photovoltaic cells based on narrow-band-gap conjugated polymer and fullerene derivative

• DOI: 10.1063/1.2338017
• Publication Date: 2006-08-22T22:10:30Z
• Authors: Yangjun Xia; Li Wang; Xianyu Deng; Dongyun Li; Xuhui Zhu; Yong Cao
• Keywords: Photocurrent; Stille reaction; Open-circuit voltage

An extremely narrow-band-gap conjugated polymer poly(5,7-bis(4-decanyl-2-thienyl)thieno[3,4-b]diathiazole-thiophene-2,5) (PDDTT) (Eg≈1.01eV) was synthesized by Stille coupling reaction, which absorbs the light from 330–1220nm in solid thin film and shows good solution processibility. The polymeric photovoltaic cells based on PDDTT/[6,6]-phenyl-C61-butyric acid methyl ester blend show short circuit density of 0.83mA∕cm2, open current voltage 0.35V, photocurrent spectra response 330to1100nm under AM 1.5 simulator (100mW∕cm2).