https://scholars.lib.ntu.edu.tw/handle/123456789/415829
Title: | Fluorination effects of A-D-A-type small molecules on physical property and the performance of organic solar cell | Authors: | Chen, K.-W. Lin, L.-Y. Li, Y.-H. Li, Y.-Z. Nguyen, T.P. Biring, S. Liu, S.-W. Wong, K.-T. |
Keywords: | 2,1,3-Benzothiaidiazole; A-D-A donor; Fluorination effect; Organic photovoltaics; Small-molecule organic solar cell | Issue Date: | 2018 | Journal Volume: | 52 | Start page/Pages: | 342-349 | Source: | Organic Electronics: physics, materials, applications | Abstract: | Four new molecules with acceptor-donor-acceptor (A-D-A) configuration where cyclopenta[2,1-b:3,4-b′]dithiophene (CPDT) as the electron-donating core connecting to cyano(CN)-substituted 2,1,3-benzothiaidiazole (BT) as electron-withdrawing end groups are reported. With the same acceptor CN-BT, we found that CPDT can serve as a better donor as compared to that of dithieno[3, 2-b: 2′, 3′-d]silole (DTS) to give stronger intramolecular charge transfer (ICT) character and therefore better light harvesting ability. The number and orientation of F-substitution on the BT ring, giving a clear structure-property relationship, can subtly manipulate the physical characteristics. These A-D-A type molecules were employed as electron donor in conjunction with C70 as the electron acceptor in vacuum-deposited bulk heterojunction (BHJ) small-molecule organic solar cells (SMOSCs). Among them, the device based on CBCIF containing BT ring with one F group directing toward the CPDT core gave the best device performance with a power conversion efficiency of 4.94% with Jsc of 10.16 mAcm−2, Voc of 0.98 V, fill factor (FF) of 0.50. The superior device characteristics were attributed to the suitable morphology of the donor/C70 film. © 2017 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85034845559&doi=10.1016%2fj.orgel.2017.11.021&partnerID=40&md5=4c4f3e9b73fbeb656569f9ed28ffa209 https://scholars.lib.ntu.edu.tw/handle/123456789/415829 |
DOI: | 10.1016/j.orgel.2017.11.021 | SDG/Keyword: | Charge transfer; Electrons; Fluorination; Halogenation; Heterojunctions; Molecules; Photovoltaic effects; Solar cells; Solar power generation; 2,1,3-Benzothiaidiazole; A-D-A donor; Fluorination effect; Organic photovoltaics; Small-molecule organic solar cells; Organic solar cells |
Appears in Collections: | 化學系 |
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