A Novel Carboxyethyltin Functionalized Sandwich-type Germanotungstate: Synthesis, Crystal Structure, Photosensitivity, and Application in Dye-Sensitized Solar Cells

作者：Sang, Xiaojing; Li, Jiansheng; Zhang, Lancui^*; Wang, Zanjiao; Chen, Weilin; Zhu, Zaiming; Su, Zhongmin; Wang, Enbo

来源：ACS Applied Materials & Interfaces, 2014, 6(10): 7876-7884.

DOI：10.1021/am501192f

• polyoxometalate
• carboxyethyltin
• photosensitivity
• TiO2
• dye-sensitized solar cell

A novel sandwich-type germanotungstate [C-(NH2)(3)](10)[Mn-2{Sn(CH2)(2)COOH}(2)(B-alpha-GeW9O34)(2)]center dot 8H(2)O (1) represents the first single crystalline polyoxometalate (POM) functionalized by open chain carboxyethyltin, which was designed and synthesized in aqueous solution and applied to a dye-sensitized solar cell (DSSC) for the first time. Its photosensitivity was explored through a fluorescence spectrum (FL), surface photovoltage spectrum (SPV), electrochemical method, and solid diffuse spectrum. 1 displays the primary features of sensitizers in DSSCs, and the efficiency of the solar cell is 0.22%. Delightedly, when 1 was employed to assemble a cosensitized solar cell configuration by preparing a 1-doped TiO2 electrode and additionally adsorbing N719 dyes, a considerably improved efficiency was achieved through increasing spectral absorption and accelerating electron transport, which is 19.4% higher than that of single N719 sensitization. This result opens up a new way to position different dyes on a single TiO2 film for cosensitization

• 出版日期2014-5-28
• 单位东北师范大学; 辽宁师范大学