基于银纳米线柔性透明导电薄膜的染料敏化太阳电池界面过程研究

项目名称： 基于银纳米线柔性透明导电薄膜的染料敏化太阳电池界面过程研究

项目编号： No.61306080

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 周聪华

作者单位： 中南大学

项目金额： 25万元

中文摘要： 染料敏化太阳电池（DSCs）因光电转换效率高、制备成本低而备受关注，柔性化有助于拓宽电池应用领域。FTO、ITO透明导电薄膜柔性差。银纳米线（AgNWs）透明导电薄膜柔性强、成本低，在极低的银负载量下（0.1克/平方米）透光度达90%、方阻达1.6 ohm/sq。本项目采用AgNWs柔性透明导电薄膜在低温下(<130 C)制备DSCs，以提高器件柔性，降低制备成本。在AgNWs与光阳极（电解质）界面增加阻挡层，以提高AgNWs抗氧化腐蚀性，抑制电荷界面复合。研究AgNWs表面覆盖率、联通度以及线间接触电阻对薄膜透光导电性能的影响规律；研究"AgNWs/阻挡层/光阳极（电解质）"界面微观结构与能级结构对界面电荷传输与复合过程的影响规律；明确底电极在DSCs光电转换过程中的重要作用。通过以上研究，使AgNWs透明导电薄膜的透光度达90%、方阻达5ohm/sq，器件效率达6.0%。

中文关键词： 银纳米线；透明导电薄膜；钙钛矿太阳电池；染料敏化太阳电池；

英文摘要： Dye sensitized solar cells (DSCs) have attracted broaden interest for the relatively high photo-to-energy conversion efficiency and low production cost. Improvement in flexibility of DSCs could make them more applicable. The commonly used transparent and conductive films like F-doped tin oxide (FTO) and Indium tin oxide (ITO) have been known to show poor flexibility, thus are not suitable for use in flexible DSCs. Silver is known to show excellent conductivity and ductility. Silver nanowires (AgNWs) derived transparent conductive film is easy to be fabricated. Based on theoretical calculation, the film could reach excellent performance (90% for transmittance, 1.6 ohm/sq for sheet resistance) at quite low silver loading or 0.1g per square meters on substrate. We here use AgNWs based transparent and conductive films to fabricate flexible DSCs at low temperature (<130 C), so as to upgrade the flexibility and lower fabrication cost of DSCs. In order to enhance the ability of AgNWs both in anti-oxidization and anti-corrosion, a blocking layer will be added to interface between AgNWs and photoanode(also electrolyte). We will firstly study the effect of coverage of AgNWs on films, connectivity and contact resistance between the nanowires on as-fabricated transparent and conductive films; and then explore the effect of

英文关键词： silver nanowire；transparent and conductive films；perovskite solar cells；dye sensitized solar cells；