Show simple item record

dc.contributor.authorFirdaus, Yuliar
dc.contributor.authorMaffei, Luna Pratali
dc.contributor.authorCruciani, Federico
dc.contributor.authorMüller, Michael A.
dc.contributor.authorLiu, Shengjian
dc.contributor.authorLopatin, Sergei
dc.contributor.authorWehbe, Nimer
dc.contributor.authorNgongang Ndjawa, Guy Olivier
dc.contributor.authorAmassian, Aram
dc.contributor.authorLaquai, Frédéric
dc.contributor.authorBeaujuge, Pierre
dc.date.accessioned2017-10-03T12:49:34Z
dc.date.available2017-10-03T12:49:34Z
dc.date.issued2017-07-21
dc.identifier.citationFirdaus Y, Maffei LP, Cruciani F, Müller MA, Liu S, et al. (2017) Polymer Main-Chain Substitution Effects on the Efficiency of Nonfullerene BHJ Solar Cells. Advanced Energy Materials 7: 1700834. Available: http://dx.doi.org/10.1002/aenm.201700834.
dc.identifier.issn1614-6832
dc.identifier.doi10.1002/aenm.201700834
dc.identifier.urihttp://hdl.handle.net/10754/625699
dc.description.abstract“Nonfullerene” acceptors are proving effective in bulk heterojunction (BHJ) solar cells when paired with selected polymer donors. However, the principles that guide the selection of adequate polymer donors for high-efficiency BHJ solar cells with nonfullerene acceptors remain a matter of some debate and, while polymer main-chain substitutions may have a direct influence on the donor–acceptor interplay, those effects should be examined and correlated with BHJ device performance patterns. This report examines a set of wide-bandgap polymer donor analogues composed of benzo[1,2-b:4,5-b′]dithiophene (BDT), and thienyl ([2H]T) or 3,4-difluorothiophene ([2F]T) motifs, and their BHJ device performance pattern with the nonfullerene acceptor “ITIC”. Studies show that the fluorine- and ring-substituted derivative PBDT(T)[2F]T largely outperforms its other two polymer donor counterparts, reaching power conversion efficiencies as high as 9.8%. Combining several characterization techniques, the gradual device performance improvements observed on swapping PBDT[2H]T for PBDT[2F]T, and then for PBDT(T)[2F]T, are found to result from (i) notably improved charge generation and collection efficiencies (estimated as ≈60%, 80%, and 90%, respectively), and (ii) reduced geminate recombination (being suppressed from ≈30%, 25% to 10%) and bimolecular recombination (inferred from recombination rate constant comparisons). These examinations will have broader implications for further studies on the optimization of BHJ solar cell efficiencies with polymer donors and a wider range of nonfullerene acceptors.
dc.description.sponsorshipY.F. and L.P.M. contributed equally to this work. This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. CRG_R2_13_BEAU_KAUST_1. The authors acknowledge concurrent support under Baseline Research Funding from KAUST. The authors thank KAUST ACL for technical support in the mass spectrometry, GPC, and elemental analyses. The authors thank Z. Kan and M. Babics for the discussions in device characterizations.
dc.publisherWiley-Blackwell
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1002/aenm.201700834/full
dc.rightsThis is the peer reviewed version of the following article: Polymer Main-Chain Substitution Effects on the Efficiency of Nonfullerene BHJ Solar Cells, which has been published in final form at http://doi.org/10.1002/aenm.201700834. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
dc.subject3,4-difluorothiophene
dc.subjectBenzo[1,2-b:4,5-b']dithiophene (BDT)
dc.subjectITIC
dc.subjectNonfullerene acceptor
dc.subjectOrganic photovoltaics
dc.subjectPolymer solar cells
dc.titlePolymer Main-Chain Substitution Effects on the Efficiency of Nonfullerene BHJ Solar Cells
dc.typeArticle
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.contributor.departmentChemical Science Program
dc.contributor.departmentMaterials Science and Engineering Program
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentImaging and Characterization Core Lab
dc.identifier.journalAdvanced Energy Materials
dc.eprint.versionPost-print
kaust.personFirdaus, Yuliar
kaust.personMaffei, Luna Pratali
kaust.personCruciani, Federico
kaust.personMüller, Michael A.
kaust.personLiu, Shengjian
kaust.personLopatin, Sergei
kaust.personWehbe, Nimer
kaust.personNgongang Ndjawa, Guy Olivier
kaust.personAmassian, Aram
kaust.personLaquai, Frédéric
kaust.personBeaujuge, Pierre


Files in this item

Thumbnail
Name:
MS - 03-27-17.pdf
Size:
777.3Kb
Format:
PDF
Description:
Accepted Manuscript
Thumbnail
Name:
SI - 03-27-17.pdf
Size:
1.837Mb
Format:
PDF
Description:
Supplemental files

This item appears in the following Collection(s)

Show simple item record