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Title: Donor-acceptor interface modification by zwitterionic conjugated polyelectrolytes in polymer photovoltaics
Authors: Kumar, A.
Pace, G.
Bakulin, A.A.
Fang, J.
Ho, P.K.H. 
Huck, W.T.S.
Friend, R.H.
Greenham, N.C.
Issue Date: Jun-2013
Citation: Kumar, A., Pace, G., Bakulin, A.A., Fang, J., Ho, P.K.H., Huck, W.T.S., Friend, R.H., Greenham, N.C. (2013-06). Donor-acceptor interface modification by zwitterionic conjugated polyelectrolytes in polymer photovoltaics. Energy and Environmental Science 6 (6) : 1589-1596. ScholarBank@NUS Repository.
Abstract: We report that we can enhance the performance of polymer photovoltaics by introducing materials with dipoles at the donor-acceptor interface of the polymer solar cells. We use a zwitterionic conjugated polyelectrolyte (ZCPE) as an interfacial layer in a model bi-layer system consisting of donor and acceptor polymers. We find an increase in short-circuit current and fill factor when a 2 nm thin layer of ZCPE is introduced between donor and acceptor polymers. Absorption of light in the ZCPE interlayer contributes to the photocurrent, and, as revealed by time-resolved pump-push optical spectroscopy, the interlayer reduces the probability of electron-hole recombination at the donor-acceptor interface. © 2013 The Royal Society of Chemistry.
Source Title: Energy and Environmental Science
ISSN: 17545692
DOI: 10.1039/c3ee00060e
Appears in Collections:Staff Publications

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