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dc.contributor.authorLuo, Jie
dc.contributor.authorXu, Mingfei
dc.contributor.authorLi, Renzhi
dc.contributor.authorHuang, Kuo-Wei
dc.contributor.authorJiang, Changyun
dc.contributor.authorQi, Qingbiao
dc.contributor.authorZeng, Wangdong
dc.contributor.authorZhang, Jie
dc.contributor.authorChi, Chunyan
dc.contributor.authorWang, Peng
dc.contributor.authorWu, Jishan
dc.date.accessioned2015-08-03T11:45:58Z
dc.date.available2015-08-03T11:45:58Z
dc.date.issued2014-01-08
dc.identifier.issn00027863
dc.identifier.doi10.1021/ja409291g
dc.identifier.urihttp://hdl.handle.net/10754/563332
dc.description.abstractPorphyrin-based dyes recently have become good candidates for dye-sensitized solar cells (DSCs). However, the bottleneck is how to further improve their light-harvesting ability. In this work, N-annulated perylene (NP) was used to functionalize the Zn-porphyrin, and four "push-pull"-type NP-substituted and fused porphyrin dyes with intense absorption in the visible and even in the near-infrared (NIR) region were synthesized. Co(II/III)-based DSC device characterizations revealed that dyes WW-5 and WW-6, in which an ethynylene spacer is incorporated between the NP and porphyrin core, showed pantochromatic photon-to-current conversion efficiency action spectra in the visible and NIR region, with a further red-shift of about 90 and 60 nm, respectively, compared to the benchmark molecule YD2-o-C8. As a result, the short-circuit current density was largely increased, and the devices displayed power conversion efficiencies as high as 10.3% and 10.5%, respectively, which is comparable to that of the YD2-o-C8 cell (η = 10.5%) under the same conditions. On the other hand, the dye WW-3 in which the NP unit is directly attached to the porphyrin core showed a moderate power conversion efficiency (η = 5.6%) due to the inefficient π-conjugation, and the NP-fused dye WW-4 exhibited even poorer performance due to its low-lying LUMO energy level and nondisjointed HOMO/LUMO profile. Our detailed physical measurements (optical and electrochemical), density functional theory calculations, and photovoltaic characterizations disclosed that the energy level alignment, the molecular orbital profile, and dye aggregation all played very important roles on the interface electron transfer and charge recombination kinetics. © 2013 American Chemical Society.
dc.description.sponsorshipJ.W. acknowledges financial support from the IMRE Core Funding (IMRE/13-1C0205) and MOE Tier 2 grant (MOE2011-T2-2-130). P.W. thanks the National 973 Program (No. 2011CBA00702) and the National Science Foundation of China (No. 51203150). K.-W.H. acknowledges financial support from KAUST.
dc.publisherAmerican Chemical Society (ACS)
dc.titleN -annulated perylene as an efficient electron donor for porphyrin-based dyes: Enhanced light-harvesting ability and high-efficiency Co(II/III)-based dye-sensitized solar cells
dc.typeArticle
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentChemical Science Program
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.contributor.departmentHCL
dc.identifier.journalJournal of the American Chemical Society
dc.contributor.institutionInstitute of Materials Research and Engineering, ASTAR, 3 Research Link, Singapore, 117602, Singapore
dc.contributor.institutionState Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
dc.contributor.institutionDepartment of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
kaust.personHuang, Kuo-Wei


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