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    杨希川

    • 研究员     博士生导师   硕士生导师
    • 性别:男
    • 毕业院校:大连理工大学
    • 学位:博士
    • 所在单位:化工学院
    • 电子邮箱:yangxc@dlut.edu.cn

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    Effect of different numbers of -CH2- units on the performance of isoquinolinium dyes.

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    论文类型:期刊论文

    发表时间:2014-03-26

    发表刊物:ACS applied materials & interfaces

    收录刊物:Scopus、EI、PubMed

    卷号:6

    期号:6

    页面范围:3907-3914

    ISSN号:1944-8252

    摘要:Three new dyes have been synthesized to investigate the influence of the distance between the electron acceptor and TiO2 surface on the performance of dye-sensitized solar cells (DSSCs). In these dyes, the isoquinolinium acceptor, with a -(CH2)nCOOH anchoring group, and a functionalized triphenylamine donor are separated by an oligothiophene bridge. The physical and electrochemical properties of the dyes were investigated systematically. The results prove that different numbers of -CH2- units between the isoquinolinium acceptor and the carboxyl anchoring group have a less pronounced effect on the physical and electrochemical properties of these dyes. However, when applied in DSSCs, a sharp decrease in the short-circuit current (Jsc) was observed with increasing numbers of -CH2- units. For example, the device containing the organic dye bearing three -CH2- units produced the lowest Jsc of 7.94 mA·cm(-2). In contrast, the device containing the dye bearing only one -CH2- unit exhibited the highest Jsc of 13.88 mA·cm(-2). The higher photocurrent obtained with the device incorporating the dye with one -CH2- unit resulted in a higher power conversion efficiency of 6.8%.