Malachite Green Derivatives for Dye-Sensitized Solar Cells: Optoelectronic Characterizations and Persistence on TiO2
Malachite Green Derivatives for Dye-Sensitized Solar Cells: Optoelectronic Characterizations and Persistence on TiO2
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DOI：
10.1246/bcsj.20170289
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发表时间：
2018-01
影响因子：
4
通讯作者：
J. Harle;Shuhei Arata;Shinya Mine;T. Kamegawa;V. Nguyen;Takeshi Maeda;H. Nakazumi;H. Fujiwara
中科院分区：
文献类型：
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作者：
J. Harle;Shuhei Arata;Shinya Mine;T. Kamegawa;V. Nguyen;Takeshi Maeda;H. Nakazumi;H. Fujiwara
孔雀石绿的衍生物，一种著名的三苯基甲基染料，已被用于第三代光伏应用，作为染料敏化太阳能电池(DSSC)。以不同的三氟乙酸酯(TFA−)、三氟酸盐(TFO)、溴化物(BR−)和四氟硼酸盐(BF4−)为染料增敏剂，以介孔锐钛矿型二氧化钛为电子收集剂，制备了Br3TiO2光催化液体电解液，并对其光电性能进行了表征。通过Zeta(ζ)电位测量，研究了染料在纳米二氧化钛表面的吸附模式，并与染料在固体电解质中的脱附速率进行了比较。研究发现，氧化物表面和体相离子对的不同亲和力对羧酸锚定发色团自组装单分子膜的稳定性和与之相关的光转化效率至关重要。
Derivatives of malachite green, a well-known triphenylmethine dye, have been adapted for third-generation photovoltaic applications as dye-sensitized solar cells (DSSC). The solar cells were developed based on a concentrated Br3−/Br− liquid electrolyte coupled to different trifluoroacetate (TFA−), triflate (TfO−), bromide (Br−) and tetrafluoroborate (BF4−) malachite green salts as dye sensitizers and mesoporous TiO2 anatase as electron collector, and their optoelectronic properties were characterized. The adsorption patterns of such salts at the TiO2 nanoparticle surface were studied by zeta (ζ) potential measurements on colloidal suspensions under neat conditions, and compared to the desorption rates of the dyes when exposed to the DSSC electrolyte. The different affinities of the ionic pairs for the oxide surface and the bulk were found crucial for the stability of the self-assembled monolayer of carboxylic acid-anchored chromophores at the surface, and for the photoconversion efficiency associated ther...