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Black polymers in bulk - heterojunction solar cells

Zhou, Yi and Gedefaw, Desta and Hellstrom, Stefan and Kratschmer, Ilse and Zhang, Fengling and Mammo, Wendimagegn and Inganas, Olle and Andersson, Mats R. (2010) Black polymers in bulk - heterojunction solar cells. IEEE Journal of Selected Topics in Quantum Electronics, 16 (6). pp. 1565-1572. ISSN 1558-4542

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Abstract

The active materials in polymer solar cells have a decisive role on the performance of the cells. Polymers with extended absorption, i.e., black polymers with absorption covering the whole visible region are desired in order to capture the important parts of the solar irradiation. Different ways of achieving black active materials are discussed and two new alternating polyfluorene (APFO) copolymers with broad absorption, APFO-Black 1 and APFO-Black 2, using two different design strategies are described. The UV-Vis absorption spectra of the polymers extend to approximately 850 nm, and the polymers were used as donors and [6,6]- phenyl-C6 1 -butyric acid methyl ester (PCBM)[60] or PCBM[70] as acceptors in solar cell devices in various mixing ratios. The best combinations yielded an overall power conversion efficiency of 1.2% for APFO-Black 1 and 1.5% for APFO-Black 2.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science, Technology and Environment (FSTE) > School of Biological and Chemical Sciences
Depositing User: Generic Email
Date Deposited: 12 Jul 2018 11:42
Last Modified: 12 Jul 2018 11:42
URI: http://repository.usp.ac.fj/id/eprint/10908
UNSPECIFIED

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