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In Situ Formation of MoO3 in PEDOT:PSS Matrix: A Facile Way to Produce a Smooth and Less Hygroscopic Hole Transport Layer for Highly Stable Polymer Bulk Heterojunction Solar Cells
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
Chinese Academic Science, Peoples R China .
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, The Institute of Technology.
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2013 (English)In: ADVANCED ENERGY MATERIALS, ISSN 1614-6832, Vol. 3, no 3, 349-355 p.Article in journal (Refereed) Published
Abstract [en]

A solution-processed neutral hole transport layer is developed by in situ formation of MoO3 in aqueous PEDOT:PSS dispersion (MoO3-PEDOT:PSS). This MoO3-PEDOT:PSS composite film takes advantage of both the highly conductive PEDOT:PSS and the ambient conditions stability of MoO3; consequently it possesses a smooth surface and considerably reduced hygroscopicity. The resulting bulk heterojunction polymer solar cells (BHJ PSC) based on poly[2,3-bis-(3-octyloxyphenyl)quinoxaline-5,8-diyl-alt-thiophene-2,5-diyl] (TQ1):[6,6]-phenyl-C71-butyric acid methyl ester (PC70BM) blends using MoO3-PEDOT:PSS composite film as hole transport layer (HTL) show considerable improvement in power conversion efficiency (PCE), from 5.5% to 6.4%, compared with the reference pristine PEDOT:PSS-based device. More importantly, the device with MoO3-PEDOT:PSS HTL shows considerably improved stability, with the PCE remaining at 80% of its original value when stored in ambient air in the dark for 10 days. In comparison, the reference solar cell with PEDOT:PSS layer shows complete failure within 10 days. This MoO3-PEDOT:PSS implies the potential for low-cost roll-to-roll fabrication of high-efficiency polymer solar cells with long-term stability at ambient conditions.

Place, publisher, year, edition, pages
Wiley-VCH Verlag Berlin , 2013. Vol. 3, no 3, 349-355 p.
Keyword [en]
polymer solar cells, bulk heterojunction, hole transport layer, hygroscopicity, ambient stability
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-91017DOI: 10.1002/aenm.201200609ISI: 000316117800013OAI: oai:DiVA.org:liu-91017DiVA: diva2:615661
Note

Funding Agencies|Swedish Energy Agency (Energimyndigheten)||Swedish Research Council (VR)||VINNOVA through program VINNMER||

Available from: 2013-04-11 Created: 2013-04-11 Last updated: 2013-04-11

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Bergqvist, JonasShi, ShengweiZhang, Fengling

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