Evidence for space-charge-limited conduction in organic photovoltaic cells at open-circuit conditions

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Fältnamn	Indikatorer	Metadata
000		03161naa a2200337 4500
001		oai:DiVA.org:liu-141435
003		SwePub
008		170929s2013 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1414352 URI
024	7	a https://doi.org/10.1103/PhysRevB.87.0852072 DOI
040		a (SwePub)liu
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Di Nuzzo, Danieleu Technical University of Eindhoven, Netherlands4 aut
245	1 0	a Evidence for space-charge-limited conduction in organic photovoltaic cells at open-circuit conditions
264	1	b American Physical Society,c 2013
338		a print2 rdacarrier
500		a Funding Agencies\|Dutch Polymer Institute (DPI) [631]
520		a The ac admittance of solar cells under illumination is investigated under open-circuit conditions. Open-circuit conditions are imposed by inserting a probe capacitor into the circuit. The capacitance and conductance of the cells are investigated as function of frequency and continuous illumination intensity. Results are compared with numerical and analytical modeling of charge recombination and transport. In bulk heterojunction solar cells with [6,6]-Phenyl-C-61(C-71)-butyric acid methyl ester as acceptor and poly(3-hexylthiophene) or poly[2-methoxy-5-(2-ethylhexyloxy)-p-phenylene vinylene] as electron donor, the high-frequency capacitance C and conductance G follow a power-law dependence on intensity of white light I, with G(I) proportional to I-3/4 and C(I) proportional to I-1/4. The modeling shows that these dependencies can be explained in terms of space-charge-limited current in combination with Langevin type recombination of carriers. For poly[2,1,3-benzothiadiazole-4,7-diyl[4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b:3,4-b]dithiophene-2,6-diyl]] the capacitance shows a weaker dependence on intensity, indicating fast recombination of photogenerated carriers. Results indicate that the fill factor of relatively well performing polymer solar cells can still be limited by space charge effects and can be improved by enhancing the charge carrier mobility or by reducing the bimolecular Langevin recombination. DOI: 10.1103/PhysRevB.87.085207
650	7	a NATURVETENSKAPx Fysikx Annan fysik0 (SwePub)103992 hsv//swe
650	7	a NATURAL SCIENCESx Physical Sciencesx Other Physics Topics0 (SwePub)103992 hsv//eng
700	1	a van Reenen, Stephanu Technical University of Eindhoven, Netherlands4 aut
700	1	a Janssen, Rene A. J.u Technical University of Eindhoven, Netherlands4 aut
700	1	a Kemerink, Martijnu Technical University of Eindhoven, Netherlands4 aut0 (Swepub:liu)marke89
700	1	a Meskers, Stefan C. J.u Technical University of Eindhoven, Netherlands4 aut
710	2	a Technical University of Eindhoven, Netherlands4 org
773	0	t Physical Review B. Condensed Matter and Materials Physicsd : American Physical Societyg 87:8q 87:8x 1098-0121x 1550-235X
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-141435
856	4 8	u https://doi.org/10.1103/PhysRevB.87.085207

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Av författaren/redakt...: Di Nuzzo, Daniel ...; van Reenen, Step ...; Janssen, Rene A. ...; Kemerink, Martij ...; Meskers, Stefan ...

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