Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lan, Shang-Che | en_US |
dc.contributor.author | Yang, Po-An | en_US |
dc.contributor.author | Zhu, Meng-Jie | en_US |
dc.contributor.author | Yu, Chia-Min | en_US |
dc.contributor.author | Jiang, Jian-Ming | en_US |
dc.contributor.author | Wei, Kung-Hwa | en_US |
dc.date.accessioned | 2014-12-08T15:29:14Z | - |
dc.date.available | 2014-12-08T15:29:14Z | - |
dc.date.issued | 2013 | en_US |
dc.identifier.issn | 1759-9954 | en_US |
dc.identifier.uri | http://hdl.handle.net/11536/21080 | - |
dc.identifier.uri | http://dx.doi.org/10.1039/c2py20819a | en_US |
dc.description.abstract | In this study we synthesized the donor-acceptor conjugated copolymers PBTT4BT and PBTT4BO featuring benzotrithiophene (BTT) units as donors and benzothiadiazole (BT) and benzoxadiazole (BO) units, respectively, as acceptors, linked through 4-dodecylthiophene spacers. The presence of the spacer units enhanced not only the solubility of the synthesized polymers but also their molecular packing in the solid state; both of these polymers exhibited good crystallinity, as evidenced by a d-spacing of 23.8 angstrom in the (100) plane in their X-ray diffraction curves. When we used these synthesized polymers in bulk heterojunction photovoltaic device applications, the optimal device incorporating PBTT4BO/PC61BM as the active layer exhibited a low efficiency of 3.2%, due to the poor solubility of PBTT4BO, whereas the optimal device incorporating the more-soluble PBTT4BT and PC71BM displayed an efficiency of 4.4%, which is substantially 1.5% higher than that for the PBTTBT/PC71BM device, where PBTTBT was formed by copolymerizing BTT and BT units without any spacer. After thermal annealing, the efficiency of the PBTT4BT/PC71BM device improved further to 5.6%, with a V-OC value of 0.72 V, a J(SC) value of 11.58 mA cm(-2) and a fill factor of 67%. The annealed PBTT4BT/PC71BM active layer possessed a nanoscaled network-like morphology with rod-like PBTT4BT domains that were beneficial for charge separation and transport; accordingly, the power conversion efficiency of the annealed PBTT4BT/PC71BM photovoltaic device was enhanced greatly over that of the as-cast PBTT4BT/PC71BM device. | en_US |
dc.language.iso | en_US | en_US |
dc.title | Thiophene spacers impart crystallinity and enhance the efficiency of benzotrithiophene-based conjugated polymers for bulk heterojunction photovoltaics | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1039/c2py20819a | en_US |
dc.identifier.journal | POLYMER CHEMISTRY | en_US |
dc.citation.volume | 4 | en_US |
dc.citation.issue | 4 | en_US |
dc.citation.spage | 1132 | en_US |
dc.citation.epage | 1140 | en_US |
dc.contributor.department | 材料科學與工程學系 | zh_TW |
dc.contributor.department | Department of Materials Science and Engineering | en_US |
dc.identifier.wosnumber | WOS:000313807200034 | - |
dc.citation.woscount | 17 | - |
Appears in Collections: | Articles |
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