Black polymers in bulk-heterojunction solar cells
Journal article, 2010

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 irradn. 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 approx. 850 nm, and the polymers were used as donors and [6,6]-phenyl-C61-butyric acid Me 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. [on SciFinder(R)]

Atomic force microscopy (AFM)

charge-carrier mobility


photovoltaic cell materials

solar energy


Y. Zhou

University of Siegen

Desta Antenehe Gedefaw

Chalmers, Chemical and Biological Engineering, Polymer Technology

Stefan Hellström

Chalmers, Chemical and Biological Engineering, Polymer Technology

Ilse Kraetschmer

Linköping University

Fengling Zhang

Linköping University

Wendimagegn Mammo

Addis Ababa University


Olle Inganaes

Linköping University

Mats Andersson

Chalmers, Chemical and Biological Engineering, Polymer Technology

IEEE Journal on Selected Topics in Quantum Electronics

1077-260X (ISSN)

Vol. 16 6 1565-1572 5491033

Subject Categories

Polymer Chemistry

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)


Materials Science



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