摘要
通过实验对比的方法对单晶硅太阳电池电致发光(EL)缺陷及不同工艺的影响进行了分析,测试了电池片的开路电压、短路电流、填充因子、光电转换效率等性能参数,并统计了太阳电池片的EL缺陷比例。实验发现浆料组分配比、烧结工艺稳定性及硅片质量是引起太阳电池EL缺陷的主要原因,浆料质量、丝网印刷工艺参数、烧结温度稳定性及镀膜工艺的减反射及钝化效果也对太阳电池的光电转换效率存在一定的影响。在此基础上,通过分析建议改善烧结工艺稳定性,采用性能更好的浆料和硅片,优化丝网印刷参数及氨气和硅烷流量比,来改善太阳电池EL缺陷,提高太阳电池的光电转换效率和合格率。
Electroluminescence （EL） defects and different process influencing factors of mono-crystalline silicon solar cells are analyzed by experimental comparison method. The open circuit voltage, short circuit current, fill factor and photoelectric conversion efficiency of the solar cells were tested, and the EL defect proportion of the solar cells is collected. It is found that the paste, sintering process, and the silicon wafer are the main causes of the EL defects. The quality of paste, the parameters of screen-printing, the stability of sintering process and the anti- reflection and passivation effect of coating process have some effects on the photoelectric conversion efficiency of solar cells. It is suggested that improving the sintering process stability, using better performance of paste and silicon wafer and optimizing the parameters of screen-printing and the flow ratios of ammonia and silane can improve the EL defect and promote the photoelectric conversion efficiency and qualified rate of solar cells.
出处
《激光与光电子学进展》
CSCD
北大核心
2013年第3期136-142,共7页
Laser & Optoelectronics Progress
基金
国家自然科学基金(61106043)
高等学校博士学科点专项科研基金(20096118120009)资助课题
关键词
太阳电池
电致发光
转换效率
浆料
烧结工艺
硅片
solar cell
electroluminescence
conversion efficiency
paste
sintering process
silicon wafer
