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Silicotungustic acid incorporated gel polymer electrolyte as efficient redox mediator for dye sensitized solar cells

机译：掺有硅铜甲酸的凝胶聚合物电解质作为染料敏化太阳能电池的有效氧化还原介体

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摘要

Silicotungustic acid (STA) modified gel polymer electrolytes (GPEs) with various wt% (0-5%) were prepared using Poly(ethylene oxide) as polymer and LiI/I-2 as redox couple. The conformational changes, by the addition of STA were studied using Fourier transform infrared spectroscopy, differential scanning calorimetry and scanning electron microscopy. Electrochemical properties like ionic conductivity (sigma) and tri-iodide diffusion co-efficient (D-I3(-)) were studied using electrochemical impendence spectroscopy and linear sweep voltammetry experiments respectively. Photovoltaic properties of fabricated dye sensitized solar cells (DSSC) using such electrolytes were studied under 85 mW cm(-2) illumination and the results were supported by Nyquist and bode phase plots from electrochemical impendence spectroscopy. A photovoltaic conversion efficiency of 6.26% was achieved for the GPE containing 3 wt% STA. Finally, the effect of Lil blocking layer for the DSSCs containing STA free and STA modified gel electrolytes was studied. (C) 2016 Elsevier B.V. All rights reserved.
机译：使用聚环氧乙烷作为聚合物，LiI / I-2作为氧化还原对，制备了具有各种重量百分比（0-5％）的硅铜甲酸（STA）改性的凝胶聚合物电解质（GPE）。通过使用傅立叶变换红外光谱，差示扫描量热法和扫描电子显微镜研究了添加的STA的构象变化。分别使用电化学阻抗谱和线性扫描伏安法研究了诸如电导率（sigma）和三碘化物扩散系数（D-I3（-））的电化学性质。在85 mW cm（-2）的光照下研究了使用这种电解质制成的染料敏化太阳能电池（DSSC）的光伏性能，该结果得到了电化学势能谱的奈奎斯特和波德相图的支持。对于含有3重量％的STA的GPE，光伏转换效率达到6.26％。最后，研究了Lil阻隔层对含有不含STA和经STA改性的凝胶电解质的DSSC的影响。 （C）2016 Elsevier B.V.保留所有权利。

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