Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 김경곤 | * |
dc.date.accessioned | 2020-12-14T16:30:04Z | - |
dc.date.available | 2020-12-14T16:30:04Z | - |
dc.date.issued | 2020 | * |
dc.identifier.issn | 2073-4360 | * |
dc.identifier.other | OAK-28317 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/255697 | - |
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.publisher | MDPI | * |
dc.subject | organic solar cell | * |
dc.subject | small molecule organic solar cell | * |
dc.subject | stability | * |
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.relation.issue | 11 | * |
dc.relation.volume | 12 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.journaltitle | POLYMERS | * |
dc.identifier.doi | 10.3390/polym12112598 | * |
dc.identifier.wosid | WOS:000593789500001 | * |
dc.identifier.scopusid | 2-s2.0-85095835278 | * |
dc.author.google | Kim, Jihee | * |
dc.author.google | Koh, Chang Woo | * |
dc.author.google | Uddin, Mohammad Afsar | * |
dc.author.google | Ryu, Ka Yeon | * |
dc.author.google | Jang, Song-Rim | * |
dc.author.google | Woo, Han Young | * |
dc.author.google | Lim, Bogyu | * |
dc.author.google | Kim, Kyungkon | * |
dc.contributor.scopusid | 김경곤(7409321823) | * |
dc.date.modifydate | 20240220113038 | * |