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Band unpinning and photovoltaic model for P3HT:PCBM organic bulk heterojunctions under illumination
dc.contributor.author | Bisquert, Juan | |
dc.contributor.author | Garcia-Belmonte, Germà | |
dc.contributor.author | Munar, Antoni | |
dc.contributor.author | Sessolo, Michele | |
dc.contributor.author | Soriano, Alejandra | |
dc.contributor.author | Bolink, Henk J. | |
dc.date.accessioned | 2012-05-28T14:36:30Z | |
dc.date.available | 2012-05-28T14:36:30Z | |
dc.date.issued | 2008 | |
dc.identifier | http://dx.doi.org/10.1016/j.cplett.2008.09.035 | |
dc.identifier.citation | Chemical Physics Letters, 465, p. 57-62 | |
dc.identifier.issn | 92614 | |
dc.identifier.uri | http://hdl.handle.net/10234/38949 | |
dc.description.abstract | Capacitance analysis of P3HT:PCBM bulk heterojunction solar cells, in dark and under illumination, shows a linear Mott-Schottky characteristic at moderate reverse bias, indicating p-doping of the organic blend. The flatband potential under illumination is displaced negatively about 0.6 V with respect to dark conditions. A basic photovoltaic model is developed to explain this, in terms of electron transfer via surface states at the metal/organic interface. Surface states with a slow exchange kinetics, become charged under illumination, unpinning the band and decreasing the depletion layer at the electron extraction contact. This becomes a major factor limiting the performance of bulk heterojunction solar cells. © 2008 Elsevier B.V. All rights reserved. | |
dc.language.iso | eng | |
dc.publisher | Elsevier | |
dc.rights.uri | http://rightsstatements.org/vocab/CNE/1.0/ | * |
dc.title | Band unpinning and photovoltaic model for P3HT:PCBM organic bulk heterojunctions under illumination | |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | http://dx.doi.org/10.1016/j.cplett.2008.09.035 | |
dc.rights.accessRights | info:eu-repo/semantics/closedAccess | |
dc.type.version | info:eu-repo/semantics/publishedVersion |
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