Print Email Facebook Twitter Electron trapping in higher adduct fullerene-based solar cells Title Electron trapping in higher adduct fullerene-based solar cells Author Lenes, M. Shelton, S.W. Sieval, A.B. Kronholm, D.F. Hummelen, J.C. Blom, P.W.M. TNO Industrie en Techniek Publication year 2009 Abstract Here, the performance of bulk-heterojunction solar cells based on a series of bisadduct analogues of commonly used derivatives of C60 and C 70, such PCBMs and theirthienyl versions, is investigated. Dueto their higher lowest unoccupied molecular orbital an increase in open-circuit voltage and thus performance is expected. It is shown that the occurrence of a multitude of different isomers results in a decrease in the electron transport for some of the materials. Surprisingly, the solar-cell characteristics are very similar for all materials. This apparent discrepancy is explained by a significant amount of shallow trapping occurring in the fullerene phase that does not hamper the solar cell performance due the filling of these shallow traps during illumination. Furthermore, the trisadduct analogue of [6O]PCBM has been investigated, which, despite an even further increase in open-circuit voltage, results in a significantly reduced device performance due to a strong deterioration of the electron mobility in the fullerene phase. © 2009 WILEY-VCH Verlag GmbH & Co. KCaA. Subject ElectronicsIndustrial InnovationBis-adductsBulk heterojunctionDevice performanceElectron transportElectron trappingLowest unoccupied molecular orbitalShallow trapsSolar cell performanceCell membranesElectron mobilityElectronsHeterojunctionsIsomersMolecular orbitalsOpen circuit voltagePhotovoltaic cellsSolar cellsFullerenes To reference this document use: http://resolver.tudelft.nl/uuid:33920b4e-53b8-4ea5-a9ac-5d8eeebee537 TNO identifier 461645 ISSN 1616-301X Source Advanced Functional Materials, 19 (18), 3002-3007 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.