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|Title:||Donor-acceptor interface modification by zwitterionic conjugated polyelectrolytes in polymer photovoltaics||Authors:||Kumar, A.
|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. https://doi.org/10.1039/c3ee00060e||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||URI:||http://scholarbank.nus.edu.sg/handle/10635/96262||ISSN:||17545692||DOI:||10.1039/c3ee00060e|
|Appears in Collections:||Staff Publications|
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