多碘阴离子掺杂光学散射型固态电解质在染料敏化太阳能电池的应用研究

项目名称： 多碘阴离子掺杂光学散射型固态电解质在染料敏化太阳能电池的应用研究

项目编号： No.21504061

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： 赵杰

作者单位： 苏州大学

项目金额： 21万元

中文摘要： 染料敏化太阳能电池是一种高效率、低成本的新型太阳能电池，有望取代传统的硅电池。电解质是其重要的组成之一，起着传输离子、再生染料的作用。常用的含有机溶剂的液态和凝胶电解质普遍存在着易挥发、易燃、易泄露等问题，限制了染料敏化太阳能电池的安全稳定性能。而发展光电性能优异的固态电解质有望从根本上解决以上问题。本项目拟设计系列光学散射型离子聚合物，利用离子液体的结构优势，并采用“多碘阴离子掺杂”的策略，制备不含有任何有机溶剂的、优异光散射性能和离子传导性能的固态电解质；该固态电解质不仅具有较高的光学散射性能，能增强光阳极对太阳光的二次吸收能力，从而增强电池性能；还通过“多碘阴离子掺杂”的策略，利用高价态金属离子与聚合物的羟基、醚键、离子结构、冠醚等相互作用，将多个碘阴离子释放进行快速迁移，从而大大增强了固态电解质的离子传导性能，促进染料的有效再生和还原，应用于高效稳定的固态染料敏化太阳能电池。

中文关键词： 离子聚合物；多碘阴离子；光散射；固态电解质；染料敏化太阳能电池

英文摘要： Owing to their high power conversion efficiency and low manufacturing cost, dye-sensitized solar cells (DSSCs) are a promising alternative to conventional Si-based solar cells. Electrolytes are one of the most important components, acting as transporting I- /I3- and regenerating dyes. However, evaporation and leakage of commonly volatile components in liquid and gel electrolytes greatly restrain the long-term stability of DSSCs. In this regard, solid-state electrolytes could be employed to fundamentally overcome those scientific and technological drawbacks. In this proposal, in virtue of special ionic groups and proposed “multi-iodide doping” strategy, a series of light-scattering ionic polymers have been designed, and further used as “organic solvent free” solid-state electrolytes containing excellent light-scattering property and ionic conductivity. These solid-state electrolytes could improve device performance, due to their high light-scattering property for enhanced light-harvesting capability of TiO2 photoanodes. In addition, “multi-iodide doping” strategy is proposed to combine –OH, -O-, ionic groups and crown with highly charged metal ions to release I- ions for enhanced ionic conductivity of solid-state electrolyte, which is very favorable of effective dye regeneration for stable and high performance solid-state dye-sensitized solar cells.

英文关键词： ionic polymer;multi-iodide; light-scattering ;solid-state electrolytes;dye-sensitized solar cells