https://scholars.lib.ntu.edu.tw/handle/123456789/415805
標題: | Synthesis and characterization of new asymmetric thieno[3,4-b]pyrazine-based D−π−A−A type small molecular donors with near-infrared absorption and their photovoltaic applications | 作者: | Chou, S.-H. Chen, H.-C. Wang, C.-K. Chung, C.-L. Hung, C.-M. Hsu, J.-C. Wong, K.-T. |
公開日期: | 2019 | 卷: | 68 | 起(迄)頁: | 159-167 | 來源出版物: | Organic Electronics: physics, materials, applications | 摘要: | Two new asymmetric D−π−A1−A2 configured small molecules named PTP and TTP bearing thieno[3,4-b]pyrazine (TP) unit as the A1 group have been designed and synthesized for solution-processed bulk-heterojunction organic solar cells (OSCs). These new dipolar molecular donors not only exhibit strong near-IR absorption but pack into antiparallel dimers, in which PTP shows a coexistence of coplanar and cofacial antiparallel dimers configuration, while TTP reveals a coplanar centrosymmetric dimer structure. Solution-processed OSCs for PTP blended with pristine C70 achieves a promising power conversion efficiency (PCE) of 3.40% along with an open-circuit voltage (VOC) of 0.64 V, a short-circuit current density (JSC) of 9.83 mA cm−2 and a fill factor (FF) of 54.0%, which is the highest efficiency to date among the TP-based materials. Conversely, the optimized TTP:C70 solar cell delivers a VOC of 0.48 V, a JSC of 6.02 mA cm−2 and a FF of 43.3%, corresponding to a moderate PCE of 1.25%. © 2019 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062146267&doi=10.1016%2fj.orgel.2019.02.013&partnerID=40&md5=adaa749cd4b7a0de48c56ed338573974 https://scholars.lib.ntu.edu.tw/handle/123456789/415805 |
DOI: | 10.1016/j.orgel.2019.02.013 | SDG/關鍵字: | Dimers; Efficiency; Heterojunctions; Infrared absorption; Infrared devices; Light absorption; Open circuit voltage; Organic solar cells; Synthesis (chemical); Bulk heterojunction organic solar cells; Centrosymmetric dimers; Near-infrared absorption; Near-IR absorption; Photovoltaic applications; Power conversion efficiencies; Solution-processed; Synthesis and characterizations; Solar cells |
顯示於: | 化學系 |
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