硅/PEDOT:PSS核壳纳米线太阳能电池中势垒高度对光伏性能的影响及其物理机制研究

项目名称： 硅/PEDOT:PSS核壳纳米线太阳能电池中势垒高度对光伏性能的影响及其物理机制研究

项目编号： No.61204068

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 信息四处

项目作者： 吕文辉

作者单位： 湖州师范学院

项目金额： 28万元

中文摘要： 硅/导电聚合物(PEDOT:PSS)核壳纳米线太阳能电池原理上可实现低成本、高效率，成为当前光伏研究领域中的热点之一。本项目的前期工作结果表明:导致原理型器件效率偏低的主要原因是光生载流子复合。本项目拟通过增大硅/PEDOT:PS核壳纳米线肖特基结的势垒高度来降低光生载流子复合。具体实施, 采用掺杂等方式调整PEDOT: PSS功函数,实现对肖特基结势垒高度的调控，探究势垒高度对器件光伏性能影响的规律。通过内量子效率测试与分析，理解势垒高度对光生载流子复合的影响,揭示势垒高度调控光伏性能的潜在物理机制。在此基础上,制备低纯硅/PEDOT:PSS核壳纳米线太阳能电池,基于获得的规律与机制来调整PEDOT:PSS功函数,降低或消除硅原料纯度对器件光伏性能的影响。通过本研究，为解决硅/PEDOT:PSS核壳纳米线光伏电池中光生载流子复合问题及优化低纯硅器件的性能提供科学依据和技术支持。

中文关键词： 硅/PEDOT:PSS核壳纳米线；肖特基结；势垒高度；光伏性能；光生载流子复合

英文摘要： Recently, Si/conducting polymer（PEDOT:PSS） core/shell nanowire solar cells have brought much attention because of their low cost and high efficiency in principle. However, the nanostructured device exhibits low power conversion efficiency, which is primarily limited by the recombination of photogenerated charge carriers. In this project, we attempt to minimize the recombination of photogenerated charge carriers by increasing the barrier height of the Si/PEDOT:PSS core/shell nanowire Schottky junction. Specifically，the Schottky barrier height will be modified by adjusting the work function of PEDOT:PSS through doping and so on. The relations between the device perfoamance and the barrier height will be investigated. In addition, the effects of the barrier height on the recombination of photogenerated charge carriers will be understood by measuring the internal quantum efficiency， and the underlying physical mechanisms assocaited with the device performance midified by the barrier height will be clarified. Finally, low-purity Si/PEDOT:PSS core/shell nanowire solar cells will be prepared, and the obtained law and machanisms can guide us to tune the work function of PEDOT:PSS, thus decreasing or eliminating the effects of the purity of Si on the device photovoltaic performance. This project will provides a scientifi

英文关键词： Si/PEDOT:PSS core/shell nanowire；Schottky junction；Barrier height；Photovoltaic performance；Recombination of photogenerated charge carriers