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DC Field | Value | Language |
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dc.citation.endPage | 808 | - |
dc.citation.number | 4 | - |
dc.citation.startPage | 796 | - |
dc.citation.title | JOURNAL OF MATERIALS CHEMISTRY C | - |
dc.citation.volume | 3 | - |
dc.contributor.author | Kranthiraja, Kakaraparthi | - |
dc.contributor.author | Gunasekar, Kumarasamy | - |
dc.contributor.author | Cho, Woosum | - |
dc.contributor.author | Park, Young Geun | - |
dc.contributor.author | Lee, Jin Yong | - |
dc.contributor.author | Shin, Yurim | - |
dc.contributor.author | Kang, In-Nam | - |
dc.contributor.author | Song, Myungkwan | - |
dc.contributor.author | Chae, Keun Hwa | - |
dc.contributor.author | Kim, BongSoo | - |
dc.contributor.author | Jin, Sung-Ho | - |
dc.date.accessioned | 2023-12-22T01:41:57Z | - |
dc.date.available | 2023-12-22T01:41:57Z | - |
dc.date.created | 2018-09-10 | - |
dc.date.issued | 2015-01 | - |
dc.description.abstract | pi-spacers and alkyl side chains play a key role in the optical, electrochemical, and photovoltaic properties of pi-conjugated polymers. To investigate the collective effects of pi-spacers, alkyl side chains, and various processing conditions on the photovoltaic properties, an array of four new low bandgap (LBG) pi-conjugated polymers (P1-P4) was designed and synthesized for their application as donor materials in bulk heterojunction polymer solar cells (BHJ PSCs). These pi-conjugated polymers contain a benzodithiophene (BDT) donor unit substituted with 2-ethylhexylselenyl or 2-hexyldecylselenyl as pi-conjugated side chains and a dialkoxybenzothiadiazole (dialkoxyBT) electron deficient unit connected with thiophene or selenophene as pi-spacers. Among the four polymers, the absorption spectra of P3 with the thiophene pi-spacer showed a well enhanced vibronic shoulder peak between 620 and 650 nm, indicating that P3 possesses a strong interchain aggregation tendency and attains a planar backbone structure due to the non-covalent interactions arising between the sulfur atom in thiophene and the oxygen atom in dialkoxyBT. Under suitable device processing conditions optimized pristine PSCs of P3 showed a maximum power conversion efficiency (PCE) of 4.09%. After employing 1,8-diiodooctane as an additive, one of the PSC devices based on P2 displayed a PCE of 5.34%. The active layers of P1-P4 showed a positive response towards methanol treatment, especially the P3-based devices delivered an improved PCE of 5.63%, which was further assessed by electrical impedance spectroscopy. These findings in the current article provide a good specimen for efficiently fine tuning the optical and photovoltaic properties of p-conjugated polymers via varying the size of alkyl chains, p-spacer groups and device processing conditions for the imminent growth of LBG p-conjugated polymers. | - |
dc.identifier.bibliographicCitation | JOURNAL OF MATERIALS CHEMISTRY C, v.3, no.4, pp.796 - 808 | - |
dc.identifier.doi | 10.1039/c4tc02092h | - |
dc.identifier.issn | 2050-7526 | - |
dc.identifier.scopusid | 2-s2.0-84930678949 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/24785 | - |
dc.identifier.url | http://pubs.rsc.org/en/Content/ArticleLanding/2015/TC/C4TC02092H#!divAbstract | - |
dc.identifier.wosid | 000347229200012 | - |
dc.language | 영어 | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.title | Influential effects of pi-spacers, alkyl side chains, and various processing conditions on the photovoltaic properties of alkylselenyl substituted benzodithiophene based polymers | - |
dc.type | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | HETEROJUNCTION SOLAR-CELLS | - |
dc.subject.keywordPlus | OPEN-CIRCUIT VOLTAGE | - |
dc.subject.keywordPlus | CONJUGATED POLYMER | - |
dc.subject.keywordPlus | HIGH-PERFORMANCE | - |
dc.subject.keywordPlus | ORGANIC PHOTOVOLTAICS | - |
dc.subject.keywordPlus | EFFICIENCY | - |
dc.subject.keywordPlus | TRANSISTORS | - |
dc.subject.keywordPlus | COPOLYMERS | - |
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