Self-assembled all-conjugated block copolymer as an effective hole conductor for solid-state dye-sensitized solar cells

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題名:	Self-assembled all-conjugated block copolymer as an effective hole conductor for solid-state dye-sensitized solar cells
作者:	吳春桂;Chen, Wei-Chih;Lee, Yi-Huan;Chen, Chia-Yuan;Kau, Kuo-Chang;Lin, Lu-Yin;Dai, Chi-An;Wu, Chun-Guey;Ho, Kuo-Chuan;Wang, Juen-Kai;Wang, Leeyih
貢獻者:	理學院化學學系
關鍵詞:	Block copolymers;Conduction band;Copolymers;Devices;Dyes;Nanostructure;Photovoltaic cells;Solar cells;Titanium dioxide
日期:	2014-02-25
上傳時間:	2026-04-21 14:24:23 (UTC+8)
出版者:	American Chemical Society;United States: American Chemical Society
摘要:	摘要： An all-conjugated diblock copolymer, poly(2,5-dihexyloxy-p-phenylene)-b-poly(3-hexylthiophene) (PPP-b-P3HT), was synthesized and applied as a hole transport material (HTM) for the fabrication of solid-state dye-sensitized solar cells (ss-DSCs). This copolymer is characterized by an enhanced crystallinity, enabling its P3HT component to self-organize into interpenetrated and long-range-ordered crystalline fibrils upon spin-drying and ultimately endowing itself to have a faster hole mobility than that of the parent P3HT homopolymer. Transient photovoltage measurements indicate that the photovoltaic cell based on PPP-b-P3HT as the HTM has a longer electron lifetime than that of the reference device based on P3HT homopolymer. Moreover, comparing the two ss-DSCs in terms of the electrochemical impedance spectra reveals that the electron density in the TiO2 conduction band is substantially higher in the PPP-b-P3HT device than in the P3HT cell. Above observations suggest that the PPP block facilitates an intimate contact between the copolymer and dye molecules absorbed on the nanoporous TiO2 layer, which significantly enhances the performance of the resulting device. Consequently, the PPP-b-P3HT ss-DSC exhibits a promising power conversion efficiency of 4.65%. This study demonstrates that conjugated block copolymers can function as superior HTMs of highly efficient ss-DSCs. 其他題名： ACS Nano 出版者： United States: American Chemical Society 出版日期： 2014-02-25 出處： ACS nano, 2014-02, Vol.8 (2), p.1254-1262 資源來源： American Chemical Society Journals 版權： Copyright © 2014 American Chemical Society 識別號： ISSN: 1936-0851 識別號： ISSN: 1936-086X 識別號： EISSN: 1936-086X 識別號： DOI: 10.1021/nn404346v 識別號： PMID: 24455966
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