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Photoconductivity as loss mechanism in organic solar cells
Linköpings universitet, Institutionen för fysik, kemi och biologi, Biomolekylär och Organisk Elektronik. Linköpings universitet, Tekniska högskolan.
Technical University of Dresden, Germany .
Technical University of Dresden, Germany .
2013 (engelsk)Inngår i: Physica Status Solidi. Rapid Research Letters, ISSN 1862-6254, E-ISSN 1862-6270, Vol. 7, nr 6, 401-405 s.Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We observe that the reverse current under illumination in solar cells containing C60 and ZnPc is dominated by a photoshunt. This shunt, not present in the dark, causes a linear current-voltage relation under illumination showing no saturation. Although observable in bulk heterojunctions, this effect is more pronounced in the presence of a pristine C60 layer. An internal quantum efficiency larger than unity under an applied negative voltage and in the spectral range where C60 absorbs identifies charges which are injected in addition to those photogenerated. The photoshunt is also present in the power-generating region and represents a loss mechanism limiting the fill factor in particular for flat heterojunction devices.

sted, utgiver, år, opplag, sider
Wiley-VCH Verlag , 2013. Vol. 7, nr 6, 401-405 s.
Emneord [en]
photoshunt; organic solar cells; internal quantum efficiency; photoconductivity
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-96482DOI: 10.1002/pssr.201307039ISI: 000320174900007OAI: oai:DiVA.org:liu-96482DiVA: diva2:642891
Tilgjengelig fra: 2013-08-23 Laget: 2013-08-20 Sist oppdatert: 2017-12-06

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