Enhanced photocurrent spectral response in low-bandgap polyfluorene and C70-derivative-based solar cells
Journal article, 2005

Plastic solar cells have been fabricated using a low-bandgap alternating copolymer of fluorene and a donor-acceptor-donor moiety (APFO-Green1), blended with 3'-(3,5-bis-trifluoromethylphenyl)-1'-(4-nitrophenyl)pyrazolino fullerene (BTPF70) as electron acceptor. The polymer shows optical absorption in two wavelength ranges, l < 500 nm and 600 < l < 1000 nm. The BTPF70 absorbs light at l < 700 nm. A broad photocurrent spectral response in the wavelength range 300 < l < 1000 nm is obtained in solar cells. A photocurrent d. of 3.4 mA cm-2, open-circuit voltage of 0.58 V, and power-conversion efficiency of 0.7% are achieved under illumination of AM1.5 (1000 W m-2) from a solar simulator. Synthesis of BTPF70 is presented. Photoluminescence quenching and electrochem. studies are used to discuss photoinduced charge transfer. [on SciFinder (R)]


Xiangjun Wang

Erik Per Perzon

Chalmers, Chemical and Biological Engineering, Polymer Technology

Frederic Oswald

Fernando Langa

Shimelis Admassie

Mats Andersson

Chalmers, Chemical and Biological Engineering, Polymer Technology

Olle Inganaes

Advanced Functional Materials

Vol. 15 10 1665-1670

Subject Categories

Polymer Chemistry

Condensed Matter Physics

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