Show simple item record

Files in this item

Thumbnail
Thumbnail

Item metadata

dc.contributor.authorEbenhoch, Bernd
dc.contributor.authorThomson, Stuart Alexander James
dc.contributor.authorGenevicius, Kristijonas
dc.contributor.authorJuska, Gytis
dc.contributor.authorSamuel, Ifor David William
dc.date.accessioned2015-03-31T14:01:03Z
dc.date.available2015-03-31T14:01:03Z
dc.date.issued2015-07
dc.identifier.citationEbenhoch , B , Thomson , S A J , Genevicius , K , Juska , G & Samuel , I D W 2015 , ' Charge carrier mobility of the organic photovoltaic materials PTB7 and PC 71 BM and its influence on device performance ' , Organic Electronics , vol. 22 , pp. 62-68 . https://doi.org/10.1016/j.orgel.2015.03.013en
dc.identifier.issn1566-1199
dc.identifier.otherPURE: 177158747
dc.identifier.otherPURE UUID: a486b09d-8841-4570-8107-192961cbcbc4
dc.identifier.otherScopus: 84961291212
dc.identifier.otherWOS: 000353334800011
dc.identifier.urihttps://hdl.handle.net/10023/6406
dc.description.abstractThe mobility is an important parameter for organic solar cell materials as it influences the charge extraction and recombination dynamics. In this study, the time of flight technique is used to investigate the charge mobility of the important organic photovoltaic materials PC71BM, PTB7 and their blend. The electron mobility of PC71BM is in the region of 1 × 10−3 cm2/Vs for the neat fullerene film, and has a positive electric field dependence. The hole mobility of PTB7 is 1 × 10−3 cm2/Vs for the neat film and 2 × 10−4 cm2/Vs for their blend. The hole mobility of the blend reduces by a factor of a thousand when the sample is cooled from room temperature to 77 K. This finding is compared with the device performance of efficient PTB7:PC71BM solar cells for varying temperature. At 77 K the solar cell efficiency halved, due to losses in fill factor and short circuit current. Bimolecular and trap-assisted recombination increase at low mobility (low temperature) conditions, whereas at high mobility conditions the open circuit voltage reduces. The power conversion efficiency as a function of temperature has a maximum between 260 K and 295 K, revealing an optimized mobility at room temperature.
dc.format.extent7
dc.language.isoeng
dc.relation.ispartofOrganic Electronicsen
dc.rightsCopyright 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).en
dc.subjectTime of flighten
dc.subjectTemperatureen
dc.subjectEfficiencyen
dc.subjectBimolecular recombinationen
dc.subjectTrap-assisted recombinationen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subjectNDASen
dc.subjectSDG 7 - Affordable and Clean Energyen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleCharge carrier mobility of the organic photovoltaic materials PTB7 and PC71BM and its influence on device performanceen
dc.typeJournal articleen
dc.contributor.sponsorEPSRCen
dc.description.versionPostprinten
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.identifier.doihttps://doi.org/10.1016/j.orgel.2015.03.013
dc.description.statusPeer revieweden
dc.identifier.grantnumberEP/I00243X/1en


This item appears in the following Collection(s)

Show simple item record