https://scholars.lib.ntu.edu.tw/handle/123456789/377465
Title: | Fluorinated thienyl-quinoxaline-based D-π-A-type copolymer toward efficient polymer solar cells: Synthesis, characterization, and photovoltaic properties | Authors: | Chen, H.-C. Chen, Y.-H. Liu, C.-H. Hsu, Y.-H. Chien, Y.-C. Chuang, W.-T. Cheng, C.-Y. Liu, C.-L. Chou, S.-W. Tung, S.-H. Chou, P.-T. SHIH-HUANG TUNG PI-TAI CHOU |
Issue Date: | 2013 | Journal Volume: | 4 | Journal Issue: | 11 | Start page/Pages: | 3411-3418 | Source: | Polymer Chemistry | Abstract: | A tailor-made donor-π-acceptor copolymer comprising of a medium electron-donating alkylthienyl-benzodithiophene (BDTT) moiety and a strong electron-accepting fluorinated thienyl-quinoxaline (TTFQ) segment with thiophene π-bridge units has been synthesized by Stille coupling polymerization and thoroughly characterized for use as a p-type semiconducting polymer. The semicrystalline copolymer PBDTT-TTFQ shows a broad visible-near-infrared absorption band with an optical bandgap of 1.67 eV and possesses a relatively low-lying HOMO level at -5.34 eV. In addition, the PBDTT-TTFQ neat film reveals a highly dense fibrillar nanostructure with a certain degree of long-range order, suggesting the nanoscale self-assembly of PBDTT and TTFQ segments. A bulk-heterojunction polymer solar cell based on the blend of 1 : 1 PBDTT-TTFQ:PC71BM shows an open circuit voltage of 0.75 V, a short circuit current density of 14.6 mA cm-2, and a fill factor of 56.1%, achieving a power conversion efficiency of 6.1% under the illumination of AM 1.5G, 100 mW cm-2. The results unambiguously indicate that the PBDTT-TTFQ is an auspicious candidate for next-generation solar cell materials. © 2013 The Royal Society of Chemistry. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84877695482&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/377465 |
DOI: | 10.1039/c3py00235g | SDG/Keyword: | Copolymers; Heterojunctions; Light absorption; Open circuit voltage; Solar cells; Thiophene; Bulk heterojunction; Electron-accepting; Electron-donating; Low-lying HOMO levels; Photovoltaic property; Polymer Solar Cells; Power conversion efficiencies; Solar cell materials; Polymers |
Appears in Collections: | 高分子科學與工程學研究所 |
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