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Trap-Induced Losses in Hybrid Photovoltaics
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-2582-1740
University of Cambridge, England.
University of Cambridge, England.
University of Cambridge, England.
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2014 (English)In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 8, no 4, 3213-3221 p.Article in journal (Refereed) Published
Abstract [en]

We investigate the loss mechanisms in hybrid photovoltaics based on blends of poly(3-hexylthiophene) with CdSe nanocrystals of various sizes. By combining the spectroscopic and electrical measurements on working devices as well as films, we identify that high trap-mediated recombination is responsible for the loss of photogenerated charge carriers in devices with small nanocrystals. In addition, we demonstrate that the reduced open-circuit voltage for devices with small nanocrystals is also caused by the traps.

Place, publisher, year, edition, pages
American Chemical Society , 2014. Vol. 8, no 4, 3213-3221 p.
Keyword [en]
hybrid solar cells; trap; charge transport and recombination; transient absorption; transient photocurrent; CdSe nanocrystals
National Category
Biochemistry and Molecular Biology
Identifiers
URN: urn:nbn:se:liu:diva-115685DOI: 10.1021/nn501185hISI: 000334990600011PubMedID: 24606110OAI: oai:DiVA.org:liu-115685DiVA: diva2:796114
Note

Funding Agencies|Cambridge Overseas Trust; China Scholarship Council; Engineering and Physical Sciences Research Council, U.K [EP/G060738/1]

Available from: 2015-03-18 Created: 2015-03-18 Last updated: 2017-12-04

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Gao, Feng

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