以多酸作为电致变色材料构筑光电致变色器件的研究

项目名称： 以多酸作为电致变色材料构筑光电致变色器件的研究

项目编号： No.21501084

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 王诗铭

作者单位： 辽宁大学

项目金额： 20万元

中文摘要： 光电致变色器件（PECD）是将染料敏化太阳能电池（DSSC）与电致变色器件巧妙结合到一起的双功能器件，其在利用太阳能和节能减排方面有巨大的应用前景。PECD中的电致变色材料是其关键部分之一。目前，应用于PECD的电致变色材料有过渡金属氧化物、有机高分子聚合物。过渡金属氧化物有制作工艺复杂、响应时间长等缺点；有机聚合物的耐久性差等缺点限制了其在PECD上的应用，因此寻找新的可应用于PECD的电致变色材料是亟待解决的问题。多酸是一类具有丰富结构的，良好的溶解性、稳定性和电致变色活性的无机材料。在前期的研究中发现，选择适当的条件利用电沉积方法制备的多酸薄膜电致变色性能优异，并且某些多酸在DSSC中可起到提高光电转化效率的作用。本课题拟采用多酸作为电致变色材料，选择合适的电沉积条件制备薄膜进而制作PECD，不仅可以促进多酸与能源材料领域的融合，还为解决开发新能源、节能降耗等重大问题提供了新的思路。

中文关键词： 多金属氧酸盐；电致变色；染料敏化太阳能电池；光伏器件

英文摘要： Photoelectrochromic device (PECD), a kind of promising bifunctional device which is the combination of the Dye-sensitized solar cell (DSSC) and electrochromic device, can be applied in the utilizing of solar energy and energy saving area. The quality of the electrochromic materials is one of the crucial parts of PECD. Nowadays, the transition metal oxide (TMO) and the organic polymer take the major parts of the electrochromic materials. But the disadvantages of the TMO-based films (e.g. complicated process to make a film, long response time, ect) and polymers-based films (e.g. inferior durability when exposed to UV light) limited their application in PECD. Therefore, search for new electrochromic materials which can be applied in PECD is an urgent and crucial work. Polyoxometalates (POMs) are a kind of inorganic material with diverse structure, high solubility, and stability. What’s more, some POMs molecules feature high electrochromic activity. In the previous studies, it turns out good ability of electrochromism when using electrodeposition method to make a POMs-based EC film. The performance of the DSSC can be enhanced after some POMs introduced to the photoanode, electrolyte or counter electrode. In this project, we plan to use the POMs as the electrochromic materials, and choose proper electrodeposition conditions to make an electrochromic film and then fabricate the PECDs. It not only promotes the POMs merging with the energy source area, but also provides a way to settle the serious problems of exploiting new energy and energy-saving.

英文关键词： polyoxometalates;electrochromism;dye-sensitized solar cell;photoelectrochromic device