https://scholars.lib.ntu.edu.tw/handle/123456789/461091
標題: | Prominent Short-Circuit Currents of Fluorinated Quinoxaline-Based Copolymer Solar Cells with a Power Conversion Efficiency of 8.0% | 作者: | Chen, Hsieh-Chih Chen, Ying-Hsiao Liu, Chi-Chang Chien, Yun-Chen Chou, Shang-Wei CHI-CHANG LIU PI-TAI CHOU |
公開日期: | 2012 | 卷: | 24 | 期: | 24 | 起(迄)頁: | 4766-4772 | 來源出版物: | Chemistry of Materials | 摘要: | A tailor-made medium-band gap fluorinated quinoxaline-based conjugated polymer of PBDT-TFQ was designed and synthesized as a donor material for bulk-heterojunction (BHJ) solar cells. This polymer is possessed of an intrachain donor-acceptor architecture and exhibits a broad and strong absorption spectrum across the entire UV-vis region. The introduction of F atoms with high electron affinity to the quinoxaline moiety is effective in further lowering both the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) energy levels of PBDT-TFQ to attain higher open-circuit voltage (Voc). With an optimized blend ratio of PBDT-TFQ:PC71BM (1:1, w/w), a high power conversion efficiency (PCE) of 8.0% was obtained, with a Voc of 0.76 V, a short-circuit current density (Jsc) of 18.2 mA cm-2, and a fill factor (FF) of 58.1% under AM 1.5G irradiation. The resulting copolymer reveals an outstanding Jsc value, arising from the higher hole mobility of PBDT-TFQ, together with the better continuous percolation pathways within the polymer blend for efficient exciton dissociation and charge transport. © 2012 American Chemical Society. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/461091 | ISSN: | 0897-4756 | DOI: | 10.1021/cm302861s | SDG/關鍵字: | Blend ratios; Bulk heterojunction; Donor-acceptors; Exciton dissociation; Fill factor; High power conversion; Highest occupied molecular orbital; Lowest unoccupied molecular orbital; Photovoltaic; Power conversion efficiencies; Quinoxalines; Absorption spectroscopy; Conversion efficiency; Copolymers; Electron energy levels; Heterojunctions; Open circuit voltage; Semiconductor materials; Solar cells; Solvents; Nanostructured materials |
顯示於: | 森林環境暨資源學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。