Trap-Induced Losses in Hybrid Photovoltaics
2014 (English)In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 8, no 4, 3213-3221 p.Article in journal (Refereed) Published
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.
hybrid solar cells; trap; charge transport and recombination; transient absorption; transient photocurrent; CdSe nanocrystals
Biochemistry and Molecular Biology
IdentifiersURN: urn:nbn:se:liu:diva-115685DOI: 10.1021/nn501185hISI: 000334990600011PubMedID: 24606110OAI: oai:DiVA.org:liu-115685DiVA: diva2:796114
Funding Agencies|Cambridge Overseas Trust; China Scholarship Council; Engineering and Physical Sciences Research Council, U.K [EP/G060738/1]2015-03-182015-03-182015-03-31