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Benzodifuran-Based pi-Conjugated Copolymers for Bulk Heterojunction Solar Cells

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Publication date 2010
Author Li H., Jiang P., Yi C. Y., Li C., Liu S. X., Tan S. T., Zhao B., Braun J., Meier W., Wandlowski T., Decurtins S.,
Project Nanostructured Polymers
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Original article (peer-reviewed)

Journal Macromolecules
Volume (Issue) 43(19)
Page(s) 8058 - 8062
Title of proceedings Macromolecules
DOI 10.1021/Ma101693d

Open Access

Abstract

Novel,pi-conjugated copolymers based on a soluble electroactive benzo[1,2-b:4,5-b']difuran (BDF) chromophore have been synthesized by the introduction of thiophene/benzo[e][1,2,5]thiadiazole/9-phenylcarbazole comonomer units. These copolymers cover broad absorption ranges from 250 to 700 rim with narrow optical band gaps of 1.71-2.01 eV. Moreover, their band Lug-is as well as their molecular electronic energy levels are readily tuned by copolymerizing. the BDF core with different pi-conjugated electron-donating or withdrawing units in different ratios. Bulk heterojunction solar cell devices arc fabricated using the copolymers as the electron donor and PCBM ([6,6]-phenyl-C(61)-butyric acid methyl ester) as the electron acceptor. Preliminary research has revealed power conversion efficiencies of 0.17-0.59% under AM 1.5 illumination (100 mW/cm(2)).
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