Improving the Photostability of Small-Molecule-Based Organic Photovoltaics by Providing a Charge Percolation Pathway of Crystalline Conjugated Polymer
DC Field | Value | Language |
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dc.contributor.author | Kim, Jihee | - |
dc.contributor.author | Koh, Chang Woo | - |
dc.contributor.author | Uddin, Mohammad Afsar | - |
dc.contributor.author | Ryu, Ka Yeon | - |
dc.contributor.author | Jang, Song-Rim | - |
dc.contributor.author | Woo, Han Young | - |
dc.contributor.author | Lim, Bogyu | - |
dc.contributor.author | Kim, Kyungkon | - |
dc.date.accessioned | 2021-08-30T09:41:40Z | - |
dc.date.available | 2021-08-30T09:41:40Z | - |
dc.date.created | 2021-06-18 | - |
dc.date.issued | 2020-11 | - |
dc.identifier.issn | 2073-4360 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/51972 | - |
dc.description.abstract | Photostability of small-molecule (SM)-based organic photovoltaics (SM-OPVs) is greatly improved by utilizing a ternary photo-active layer incorporating a small amount of a conjugated polymer (CP). Semi-crystalline poly[(2,5-bis(2-hexyldecyloxy)phenylene)-alt-(5,6-difluoro-4,7-di(thiophen-2-yl)benzo[c][1,2,5]thiadiazole)] (PPDT2FBT) and amorphous poly[(2,5-bis(2-decyltetradecyloxy)phenylene)-alt-(5,6-dicyano-4,7-di(thiophen-2-yl)benzo[c][1,2,5]thiadiazole)] (PPDT2CNBT) with similar chemical structures were used for preparing SM:fullerene:CP ternary photo-active layers. The power conversion efficiency (PCE) of the ternary device with PPDT2FBT (Ternary-F) was higher than those of the ternary device with PPDT2CNBT (Ternary-CN) and a binary SM-OPV device (Binary) by 15% and 17%, respectively. The photostability of the SM-OPV was considerably improved by the addition of the crystalline CP, PPDT2FBT. Ternary-F retained 76% of its initial PCE after 1500 h of light soaking, whereas Ternary-CN and Binary retained only 38% and 17% of their initial PCEs, respectively. The electrical and morphological analyses of the SM-OPV devices revealed that the addition of the semi-crystalline CP led to the formation of percolation pathways for charge transport without disturbing the optimized bulk heterojunction morphology. The CP also suppressed trap-assisted recombination and enhanced the hole mobility in Ternary-F. The percolation pathways enabled the hole mobility of Ternary-F to remain constant during the light-soaking test. The photostability of Ternary-CN did not improve because the addition of the amorphous CP inhibited the formation of ordered SM domains. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | MDPI | - |
dc.subject | OPEN-CIRCUIT VOLTAGE | - |
dc.subject | HETEROJUNCTION SOLAR-CELLS | - |
dc.subject | FILL FACTOR | - |
dc.subject | BULK | - |
dc.subject | RECOMBINATION | - |
dc.subject | PERFORMANCE | - |
dc.subject | EFFICIENCY | - |
dc.subject | STABILITY | - |
dc.subject | DETERMINANT | - |
dc.title | Improving the Photostability of Small-Molecule-Based Organic Photovoltaics by Providing a Charge Percolation Pathway of Crystalline Conjugated Polymer | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Woo, Han Young | - |
dc.identifier.doi | 10.3390/polym12112598 | - |
dc.identifier.scopusid | 2-s2.0-85095835278 | - |
dc.identifier.wosid | 000593789500001 | - |
dc.identifier.bibliographicCitation | POLYMERS, v.12, no.11 | - |
dc.relation.isPartOf | POLYMERS | - |
dc.citation.title | POLYMERS | - |
dc.citation.volume | 12 | - |
dc.citation.number | 11 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Polymer Science | - |
dc.relation.journalWebOfScienceCategory | Polymer Science | - |
dc.subject.keywordPlus | OPEN-CIRCUIT VOLTAGE | - |
dc.subject.keywordPlus | HETEROJUNCTION SOLAR-CELLS | - |
dc.subject.keywordPlus | FILL FACTOR | - |
dc.subject.keywordPlus | BULK | - |
dc.subject.keywordPlus | RECOMBINATION | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | EFFICIENCY | - |
dc.subject.keywordPlus | STABILITY | - |
dc.subject.keywordPlus | DETERMINANT | - |
dc.subject.keywordAuthor | organic solar cell | - |
dc.subject.keywordAuthor | small molecule organic solar cell | - |
dc.subject.keywordAuthor | stability | - |
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