晶界和孔洞对CdTe太阳能电池电流传导和性能影响的研究

项目名称： 晶界和孔洞对CdTe太阳能电池电流传导和性能影响的研究

项目编号： No.51472239

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 李辉

作者单位： 中国科学院电工研究所

项目金额： 82万元

中文摘要： 提高低成本多晶薄膜太阳能电池在社会整体能源所占比重需提高其转化效率，研究晶界和孔洞性质对电流传导和器件性能的影响有助于提高多晶薄膜太阳能电池的转化效率。本项目将开展关键材料晶界和孔洞性质对低温磁控溅射CdTe多晶电池器件电流传导和器件性能影响的研究工作。提出将晶界和孔洞性能与电流传导和器件性能相结合的新思路，研究磁控溅射CdTe电池器件转化效率和性能提高的关键材料因素，得到提高CdTe电池器件关键材料的晶界和孔洞性质；构筑电池器件，发展原位技术，集多种表征和测量技术为一体，研究CdTe多晶薄膜晶界和孔洞微观结构、物理、化学性能与电流传输及其物理机制、少子寿命、和电池器件之间的关系；利用不同生长条件、掺杂、Cl处理条件、背接触材料调控CdTe多晶薄膜晶界和孔洞性质，阐明不同晶界和孔洞性质下电流传导、少子寿命、电池器件的规律，并通过调控晶界和孔洞性质制备高转化效率的CdTe电池器件。

中文关键词： 晶界；孔洞；CdTe太阳电池；电流传输；器件性能

英文摘要： It is important to improve the conversion efficiency of the low cost polycrystalline thin film solar cells in order to enhance the energy proportion in the whole social energy. Study the effect of grain boundaries and voids properties on the current conduction and device performances is helpful to improve the conversion efficiency of polycrystalline thin film solar cells. This project aims to study the effect of grain boundaries and voids properties of key materials on current conduction and device performances of polycrystalline CdTe solar cells deposited by low temperature magnetron sputtering. We propose the new idea of building the relationship between the current conduction,performances of CdTe solar cells and grain boundaries,voids properties of key materials in the CdTe solar cells grown by low temperature magnetron sputtering.This project is expected to study the key material factors for improving the conversion efficiency and performances of CdTe solar cells grown by magnetron sputtering.This project is expected to get the grain boundaries and voids properties of key materials for improving the conversion efficiency of CdTe solar cells.By building solar cell devices, developing in situ technique, and combining variety of characterization and measurement technologies, the relationship between grain boundaries, voids properties including microstructure, physical, chemical properties and current transport, physical mechanism, minority carrier lifetime, and device performances will be studied.The properties of grain boundaries and voids will be modified via different growth conditions, doping, Cl treatment conditions, and the back contact materials. The current conduction, minority carrier lifetime, and solar cell devices properties under different grain boundaries and voids properties is expected to obtained. High efficiency CdTe solar cells is expected to obtained by regulating the grain boundaries and voids properties.

英文关键词： grain boundaries;voids;CdTe solar cells;current transport;device properties