https://scholars.lib.ntu.edu.tw/handle/123456789/378218
標題: | 2-alkyl-5-thienyl-substituted benzo[1,2- b:4,5- b ′]dithiophene-based donor molecules for solution-processed organic solar cells | 作者: | Patra, D. Huang, T.-Y. Chiang, C.-C. Maturana, R.O.V. Pao, C.-W. Ho, K.-C. Wei, K.-H. Chu, C.-W. KUO-CHUAN HO |
關鍵字: | benzo[1,2- b:4,5- b ′]dithiophenes; donor-acceptor; external quantum efficiency; organic solar cells; power conversion efficiency; solution-processed small-molecule | 公開日期: | 2013 | 卷: | 5 | 期: | 19 | 起(迄)頁: | 9494-9500 | 來源出版物: | ACS Applied Materials and Interfaces | 摘要: | In this study, we have strategically designed and convergently synthesized two novel, symmetrical, and linear A-D-A-type π-conjugated donor molecules (TBDTCNR, TBDTCN), each containing a planar electron-rich 2-octylthiene-5-yl- substituted benzodithiophene (TBDT) unit as the core, flanked by octylthiophene units and end-capped with electron-deficient cyanoacetate (CNR) or dicyanovinyl (CN) units. We thoroughly characterized both of these materials and investigated the effects of the end groups (CNR, CN) on their optical, electrochemical, morphological, and photovoltaic properties. We then fabricated solution-processed bulk heterojunction organic solar cells incorporating TBDTCNR and TBDTCN. Among our tested devices, the one containing TBDTCNR and [6,6]-phenyl-C61-butyric acid methyl ester in a 1:0.40 ratio (w/w) exhibited the highest power conversion efficiency (5.42%) with a short-circuit current density (Jsc) of 9.08 mA cm-2, an open circuit voltage (Voc) of 0.90 V, and an impressive fill factor (FF) of 0.66 under AM 1.5G irradiation (100 mW cm-2). The FFs of these solution-processed small-molecule organic solar cells (SMOSCs) are outstanding when compared with those recently reported for benzodithiophene (BDT)-based SMOSCs, because of the high crystallinity and excellent stacking properties of the TBDT-based compounds. © 2013 American Chemical Society. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84885455086&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/378218 |
DOI: | 10.1021/am4021928 | SDG/關鍵字: | Butyric acid; Conversion efficiency; Crystallinity; Efficiency; Heterojunctions; Molecules; Open circuit voltage; Organic polymers; Photovoltaic effects; Synthesis (chemical); Bulk heterojunction organic solar cells; Donor acceptors; External quantum efficiency; Photovoltaic property; Power conversion efficiencies; Small molecules; Small-molecule organic solar cells; [6 ,6]-phenyl-C61-butyric acid methyl esters; Organic solar cells |
顯示於: | 化學工程學系 |
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