Effect of the TiO2 surface modification with 3-glycidyloxypropyltrimethoxysilane on the aggregation of cresyl violet: Application to a dye-sensitized solar cell
Effect of the TiO2 surface modification with 3-glycidyloxypropyltrimethoxysilane on the aggregation of cresyl violet: Application to a dye-sensitized solar cell
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3-缩水甘油氧基丙基三甲氧基硅烷对 TiO2 表面进行修饰对甲酚紫聚集的影响：在染料敏化太阳能电池中的应用
DOI：
10.1016/j.matchemphys.2022.126196
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发表时间：
2022
影响因子：
4.6
通讯作者：
Takeshita Tatsuya
中科院分区：
文献类型：
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作者：
Hakkaku Shigeo;Mitarai Kosuke;Fujii Keisuke;Takeshita Tatsuya
染料聚集是染料敏化太阳能电池中的一种典型现象，导致从光激发染料到二氧化钛(Ti02)的电子注入效率降低。由于这会导致光伏电池性能的下降，因此在对其进行研究时不能忽视这一点。报道了3-缩水甘油基氧丙基三甲氧基硅烷(GPTMS)与甲酚紫(CV)共价键合修饰的二氧化钛电极。本研究的目的是了解硅烷偶联剂(SCA)对染料聚集的影响。通过在二氧化钛表面进行GPTMS处理，防止了CV在二氧化钛表面的聚集。这一结果从总透过率光谱中观察到的二聚体吸收强度的降低得到了揭示。密度泛函理论计算和荧光衰减曲线测量表明，共价结合在GPTMS上的CV在DSSCs中起光敏染料的作用。结果是，通过阻止其在二氧化钛表面的聚集(增加7倍：0.0020%-0.014%)，含有CV的直接序列干细胞的光伏性能得到了提高。我们的结论是，经SCAS处理的二氧化钛表面可以帮助防止染料聚集，从而提高DSSCs的光伏性能。
Dye aggregation is a typical phenomenon occurring in dye-sensitized solar cells (DSSCs), which causes a decrease in the electron injection efficiency from the photoexcited dye to titanium dioxide (TiO2). As this results in a decrease in the photovoltaic performance, it cannot be ignored in the study of DSSCs. This paper reports a DSSC involving a TiO2electrode chemically modified by cresyl violet (CV) covalently attached to 3-glycidyloxypropyltrimethoxysilane (GPTMS). The aim of the study is to understand the influence of silane coupling agents (SCAs) on dye aggregation. Aggregation of CV occurring on the TiO2surface was prevented by GPTMS treatment on the TiO2surface. This result was revealed by the decreased absorption intensity of the dimeric band observed in the total transmittance spectra. Density functional theory calculations and fluorescence decay curve measurements indicated that the CV covalently attached to GPTMS acts as a photosensitizing dye in DSSCs. As a result, the photovoltaic performance of DSSCs containing CV was enhanced by preventing its aggregation upon GPTMS treatment onto the TiO2surface (7-fold increase: 0.0020%–0.014%). We concluded that TiO2surfaces treated with SCAs can help to prevent dye aggregation, and therefore, enhance the photovoltaic performance of DSSCs.