螺旋二芴的化学掺杂及高效柔性固态太阳能电池的制备研究

项目名称： 螺旋二芴的化学掺杂及高效柔性固态太阳能电池的制备研究

项目编号： No.21203159

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理化学

项目作者： 李鑫

作者单位： 厦门大学

项目金额： 25万元

中文摘要： 柔性染料敏化太阳能电池具有低成本、便携、柔性等特点，被誉为下一代太阳能电池。目前柔性染料敏化太阳能电池实用化的最大问题是液态电解质挥发引起的长期稳定性下降。固态电解质的应用有望解决液态电解质的挥发引起的长期稳定性下降问题，但其较低的载流子迁移率以及其与氧化钛所形成的界面上载流子复合的增加导致了电池光电转换效率的急剧下降。本项目将采用螺旋二芴基空穴传输材料作为柔性固态DSC的电解质，通过化学掺杂的方式研究化合物的掺杂对该材料载流子迁移率的影响，采用电化学交流阻抗和强度调制光谱研究化学掺杂对螺旋二芴电解质/氧化钛界面上光生电子复合的影响，同时还通过调整与优化氧化钛薄膜内部结构以提高固态电解质在薄膜中的渗透并提高光生电子的收集效率，最终获得高效率、长期稳定的柔性固态太阳能电池。项目的研究成果对柔性固态太阳能电池的研究和产业化有着十分重要的科学价值和指导意义。

中文关键词： 螺旋二芴；化学掺杂；纳米线；柔性；固态太阳能电池

英文摘要： Flexible dye-sensitized solar cells (DSCs), regarded as the next general solar cells, have attracted great attention recently due to their low cost, flexibility, and short pay-back time. Up to date, the leakage caused by liquid electrolytes of DSCs is still unsolved, which greatly hinders the application of flexible DSCs. Solid-state electrolytes for flexible DSCs have also been intensively studied to replace the liquid electrolytes to improve the long term stability of DSCs. However, the low mobility of holes in those solid-state electrolytes leads to an increased recombination at the interface between TiO2 and electrolyte, and greatly impairs the photovoltaic performance of flexible DSCs. In this proposal, spiro-fluorene hole conductor materials will be chemically doped to be used in flexible solid-state DSCs (SSDSCs). The effects of doping on the mobility of fluorene materials will be studied. Electrochemical impedance spectroscopy and intensity modulated spectroscopy will be adopted to scrutinize the effect of doping on the carrier recombination in the flexible SSDSCs. To further improve the efficiency of flexible SSDSCs, the nanostructured photoanode will be also optimized. The proposal is quite important for the application of flexible DSCs.

英文关键词： Spiro-oMeTAD；chemical doping；nanorod；flexible；solid-state solar cell