Unsymmetrical squaraines incorporating cabazole as a donor for dye-sensitized solar cells

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題名:	Unsymmetrical squaraines incorporating cabazole as a donor for dye-sensitized solar cells
作者:	吳春桂;Li, Jheng-Ying;Lin, Tsu-Han;Chen, Szu-Chien;Wu, Chun-Guey
貢獻者:	理學院化學學系
關鍵詞:	Carbazole;Dye-sensitized solar cell;Squaraines
日期:	2012-10-01
上傳時間:	2026-04-21 13:59:55 (UTC+8)
出版者:	Wiley-Blackwell;Weinheim: WILEY-VCH Verlag
摘要:	摘要： Three unsymmetrical squaraines, where the electron‐rich thiophene or bithiophene conjugated fragment was used to link unconventionally the squaraine core and carbazole (or methyl) group, were prepared. JYL‐SQ1 with thiophene as a donor and indoline‐carboxylic acid as an acceptor has λmax of 568 nm which is much longer than the general metal‐free organic dyes. Adding a carbazole unit in JYL‐SQ1 (forms JYL‐SQ2) can red‐shift the λmax to 603 nm. However, cabazole is not a strong donor (and indoline‐carboxylic acid is a weak acceptor) the LUMO of all three dyes are delocalized majorly on squaraine unit: the excited electrons of dye molecules injecting into TiO2 are not so efficiency, resulting in low short‐circuit current and conversion efficiency. The corresponding DSSC devices have the conversion efficiency of 0.71%, 2.59% and 2.22% for JYL‐SQ1, JYL‐SQ2 and THL‐SQ3, respectively. Three new unsymmetrical squaraine dyes are prepared and their physicochemical properties are studies. The photovoltaic performance of these dyes sensitized DSSCs reveals that the donor‐ squaraine‐acceptor is an optimal molecular architecture for high efficiency dye. Furthermore, TBP cannot be used with these squaraine dyes therefore other co‐adsorbent need to be searched in order to take the advantages of squaraine dyes for DSSCs. 其他題名： Jnl Chinese Chemical Soc 出版者： Weinheim: WILEY-VCH Verlag 出版日期： 2012-10 出處： Journal of the Chinese Chemical Society (Taipei), 2012-10, Vol.59 (10), p.1337-1344 版權： Copyright © 2012 The Chemical Society Located in Taipei & Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim, Germany 識別號： ISSN: 0009-4536 識別號： EISSN: 2192-6549 識別號： DOI: 10.1002/jccs.201200250
顯示於類別:	[化學學系] 期刊論文

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