Enhanced photocurrent spectral response in low-bandgap polyfluorene and C70-Derivative-Based Solar Cells
2005 (English)In: Advanced Functional Materials, ISSN 1616-301X, Vol. 15, no 10, 1665-1670 p.Article in journal (Refereed) Published
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)pyrazolinofullerene (BTPF70) as electron acceptor. The polymer shows optical absorption in two wavelength ranges, < 500 nm and 600 < < 1000 nm. The BTPF70 absorbs light at < 700 nm. A broad photocurrent spectral response in the wavelength range 300 < < 1000 nm is obtained in solar cells. A photocurrent density 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 electrochemical studies are used to discuss photoinduced charge transfer.
Place, publisher, year, edition, pages
2005. Vol. 15, no 10, 1665-1670 p.
Fullerenes, Polyfluorenes, Solar cells - organic
IdentifiersURN: urn:nbn:se:liu:diva-13889DOI: 10.1002/adfm.200500114OAI: oai:DiVA.org:liu-13889DiVA: diva2:22131