Charge Carrier Transport and Photogeneration in P3HT:PCBM Photovoltaic Blends

Handle URI:
http://hdl.handle.net/10754/553016
Title:
Charge Carrier Transport and Photogeneration in P3HT:PCBM Photovoltaic Blends
Authors:
Laquai, Frederic ( 0000-0002-5887-6158 ) ; Andrienko, Denis; Mauer, Ralf; Blom, Paul W. M.
Abstract:
This article reviews the charge transport and photogeneration in bulk-heterojunction solar cells made from blend films of regioregular poly(3-hexylthiophene) (RR-P3HT) and methano­fullerene (PCBM). The charge transport, specifically the hole mobility in the RR-P3HT phase of the polymer:fullerene photovoltaic blend, is dramatically affected by thermal annealing. The hole mobility increases more than three orders of magnitude and reaches a value of up to 2 × 10−4 cm2 V−1 s−1 after the thermal annealing process as a result of an improved semi-crystallinity of the film. This significant increase of the hole mobility balances the electron and hole mobilities in a photovoltaic blend in turn reducing space-charge formation, and this is the most important factor for the strong enhancement of the photovoltaic efficiency compared to an as cast, that is, non-annealed device. In fact, the balanced charge carrier mobility in RR-P3HT:PCBM blends in combination with a field- and temperature-independent charge carrier generation and greatly reduced non-geminate recombination explains the large quantum efficiencies mea­sured in P3HT:PCBM photovoltaic devices.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Solar and Photovoltaic Engineering Research Center
Citation:
Charge Carrier Transport and Photogeneration in P3HT:PCBM Photovoltaic Blends 2015:n/a Macromolecular Rapid Communications
Journal:
Macromolecular Rapid Communications
Issue Date:
3-May-2015
DOI:
10.1002/marc.201500047
Type:
Article
ISSN:
10221336
Additional Links:
http://doi.wiley.com/10.1002/marc.201500047
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorLaquai, Fredericen
dc.contributor.authorAndrienko, Denisen
dc.contributor.authorMauer, Ralfen
dc.contributor.authorBlom, Paul W. M.en
dc.date.accessioned2015-05-17T20:37:23Zen
dc.date.available2015-05-17T20:37:23Zen
dc.date.issued2015-05-03en
dc.identifier.citationCharge Carrier Transport and Photogeneration in P3HT:PCBM Photovoltaic Blends 2015:n/a Macromolecular Rapid Communicationsen
dc.identifier.issn10221336en
dc.identifier.doi10.1002/marc.201500047en
dc.identifier.urihttp://hdl.handle.net/10754/553016en
dc.description.abstractThis article reviews the charge transport and photogeneration in bulk-heterojunction solar cells made from blend films of regioregular poly(3-hexylthiophene) (RR-P3HT) and methano­fullerene (PCBM). The charge transport, specifically the hole mobility in the RR-P3HT phase of the polymer:fullerene photovoltaic blend, is dramatically affected by thermal annealing. The hole mobility increases more than three orders of magnitude and reaches a value of up to 2 × 10−4 cm2 V−1 s−1 after the thermal annealing process as a result of an improved semi-crystallinity of the film. This significant increase of the hole mobility balances the electron and hole mobilities in a photovoltaic blend in turn reducing space-charge formation, and this is the most important factor for the strong enhancement of the photovoltaic efficiency compared to an as cast, that is, non-annealed device. In fact, the balanced charge carrier mobility in RR-P3HT:PCBM blends in combination with a field- and temperature-independent charge carrier generation and greatly reduced non-geminate recombination explains the large quantum efficiencies mea­sured in P3HT:PCBM photovoltaic devices.en
dc.relation.urlhttp://doi.wiley.com/10.1002/marc.201500047en
dc.rightsThis is the peer reviewed version of the following article: Laquai, F., Andrienko, D., Mauer, R. and Blom, P. W. M. (2015), Charge Carrier Transport and Photogeneration in P3HT:PCBM Photovoltaic Blends. Macromol. Rapid Commun.. doi: 10.1002/marc.201500047, which has been published in final form at http://doi.wiley.com/10.1002/marc.201500047. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.en
dc.subjectpoly(3-hexylthiophene)en
dc.subjectcharge recombinationen
dc.subjectcharge transporten
dc.subjectDFT calculationsen
dc.subjectorganic solar cellsen
dc.titleCharge Carrier Transport and Photogeneration in P3HT:PCBM Photovoltaic Blendsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Centeren
dc.identifier.journalMacromolecular Rapid Communicationsen
dc.eprint.versionPost-printen
dc.contributor.institutionMax Planck Institute for Polymer Research; Ackermannweg 10 D-55122 Mainz Germanyen
dc.contributor.institutionMax Planck Institute for Polymer Research; Ackermannweg 10 D-55122 Mainz Germanyen
dc.contributor.institutionMax Planck Institute for Polymer Research; Ackermannweg 10 D-55122 Mainz Germanyen
dc.contributor.institutionMax Planck Institute for Polymer Research; Ackermannweg 10 D-55122 Mainz Germanyen
dc.contributor.institutionInnovationLab GmbH, Speyerer Straße 4, 69115 Heidelberg, Germanyen
kaust.authorLaquai, Fredericen
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