https://scholars.lib.ntu.edu.tw/handle/123456789/504192
DC 欄位 | 值 | 語言 |
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dc.contributor.author | Wang, S.-H. | en_US |
dc.contributor.author | Raja, R. | en_US |
dc.contributor.author | Yu, S.-W. | en_US |
dc.contributor.author | Jeng, R.-J. | en_US |
dc.contributor.author | Chen, J.-C. | en_US |
dc.contributor.author | Rwei, S.-P. | en_US |
dc.contributor.author | LEE-YIH WANG | en_US |
dc.creator | Wang, L.;Rwei, S.-P.;Chen, J.-C.;Jeng, R.-J.;Yu, S.-W.;Raja, R.;Wang, S.-H. | - |
dc.date.accessioned | 2020-06-23T09:44:06Z | - |
dc.date.available | 2020-06-23T09:44:06Z | - |
dc.date.issued | 2020 | - |
dc.identifier.issn | 00143057 | - |
dc.identifier.uri | https://www.scopus.com/record/display.uri?eid=2-s2.0-85085570759&origin=resultslist&sort=plf-f&cite=2-s2.0-85085570759&src=s&imp=t&sid=a7e58d2b6e88fbd823469365c4888561&sot=cite&sdt=a&sl=0 | - |
dc.description.abstract | We designed and synthesized a novel series of two-dimensional (2D) conjugated polymers (P1-2T, P2-2T2F and P3-4T2F) containing 2,2′-bithiophene (2T) and 3,3′-difluoro-2,2′-bithiophene (2T2F) as donor units, and 4,7-benzo[c][1,2,5]thiadiazole (BT) and 4,7-di(thiophen-2-yl)benzo[c][1,2,5]thiadiazole (DTBT) as acceptor units appended with conjugated vinyl-terthiophene (VTT) side chain. We comprehensively investigated the effect of fluorination and thiophene (T) π-spacer on the optoelectronic properties and photovoltaic performance of the resulting copolymers. In comparison with non-fluorinated polymer P1-2T, the fluorinated polymer P2-2T2F and P3-4T2F had down shifted highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels with an enhanced absorption band. Moreover, 2D grazing incidence wide-angle X-ray scattering and space charge limited current measurement showed that the presence of thiophene π-spacer in P3-4T2F promoted dominant face-on orientation, high crystallinity and enhanced hole mobility, compared with P2-2T2F. As a result, the inverted polymer solar cell based on the P3-4T2F:PC61BM blend exhibited a high power conversion efficiency (PCE) of 6.66% with a Jsc of 12.99 ± 0.30 mA/cm−2. In contrast, the P1-2T:PC61BM and P2-2T2F:PC61BM devices without π-spacer showed a PCE of 2.22% and 0.95%, respectively. The PCE of the P3-4T2F:PC61BM device was further improved to 6.89% by using a polyethylenimine ethoxylated (PEIE) interlayer between ITO and ZnO. This study reinvigorates the key modulation of a 2D conjugated polymer with improved photovoltaic performance. © 2020 Elsevier Ltd | - |
dc.publisher | Elsevier Ltd | - |
dc.relation.ispartof | European Polymer Journal | - |
dc.subject.classification | [SDGs]SDG7 | - |
dc.subject.other | Conjugated polymers; Crystallinity; Electron energy levels; Fluorine containing polymers; Hole mobility; II-VI semiconductors; Molecular orbitals; Photovoltaic effects; Shims; Thiophene; X ray scattering; Zinc oxide; High performance Polymer solar cells; Highest occupied molecular orbital; Inverted polymer solar cells; Lowest unoccupied molecular orbital; Optoelectronic properties; Photovoltaic performance; Polyethylenimine ethoxylated; Space charge limited currents; Polymer solar cells | - |
dc.title | Highly crystalline two-dimensional copolymer with dominant face-on orientation for high performance polymer solar cells | en_US |
dc.type | journal article | en |
dc.identifier.doi | 10.1016/j.eurpolymj.2020.109799 | - |
dc.identifier.scopus | 2-s2.0-85085570759 | - |
dc.relation.pages | 109799 | - |
dc.relation.journalvolume | 134 | - |
item.openairetype | journal article | - |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_6501 | - |
item.fulltext | no fulltext | - |
item.grantfulltext | none | - |
crisitem.author.dept | Polymer Science and Engineering | - |
crisitem.author.dept | Polymer Science and Engineering | - |
crisitem.author.dept | Center for Condensed Matter Sciences | - |
crisitem.author.orcid | 0000-0002-0913-4975 | - |
crisitem.author.parentorg | College of Engineering | - |
crisitem.author.parentorg | College of Engineering | - |
crisitem.author.parentorg | Others: University-Level Research Centers | - |
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