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Optical, electrical and electrochemical evaluation of sputtered platinum counter electrodes for dye sensitized solar cells

机译:染料敏化太阳能电池溅射铂对电极的光学,电和电化学评估

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Since Gratzel and O'Regan started in 1991, dye-sensitized solar cells (DSSC) have been extensively studied around the world. In addition to increasing efficiency, their characteristics such as low cost materials and inexpensive manufacturing processes are attractive for organic solar cells. Several parts of DSSC devices are being researched such as semiconductor engineering, low cost counter electrodes, electrolytes, and dyes. In this work, platinum (Pt) thin films were deposited by sputtering technique to produce counter electrodes for DSSC. The films were characterized by profilometry, elipsometry, four-point probe sheet resistance, spectrophotometry, and electrochemical impedance spectroscopy. The electrode response was also compared to that built from a commercial platinum solution. The results allow us to determine the minimum Pt film thickness necessary to achieve a relevant reduction of the sheet resistance and charge transfer resistance, which preserve a significant electrode transparency. The 22 nm and 24.8 nm thick films combined low charge transfer resistance and good transparency. The 122 nm Pt film presented the lowest charge transfer resistance. (C) 2015 Elsevier B.V. All rights reserved.
机译:自1991年Gratzel和O'Regan创立以来,染料敏化太阳能电池(DSSC)在世界范围内得到了广泛的研究。除了提高效率之外,它们的特性(例如低成本的材料和廉价的制造工艺)对于有机太阳能电池也很有吸引力。正在研究DSSC器件的多个部分,例如半导体工程,低成本对电极,电解质和染料。在这项工作中,通过溅射技术沉积了铂(Pt)薄膜,以生产DSSC的对电极。膜的特征在于轮廓测定法,椭偏测定法,四点探针薄层电阻,分光光度法和电化学阻抗谱。还将电极响应与由商业铂溶液构建的电极响应进行了比较。结果使我们能够确定实现显着降低薄层电阻和电荷转移电阻所需的最小Pt膜厚度,从而保持显着的电极透明性。 22 nm和24.8 nm厚的薄膜兼具低电荷转移电阻和良好的透明度。 122 nm Pt膜呈现最低的电荷转移电阻。 (C)2015 Elsevier B.V.保留所有权利。

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