摘要
本文系统研究了Cu（In,Ga）Se2（CIGS）薄膜太阳电池在入射光强为10-100 mW/cm^2范围内的性能参数。结果表明,随光强的减弱,CIGS电池的转换效率、填充因子、短路电流密度和开路电压等性能参数逐步衰减;电池参数与光强的依赖关系可明显划分为两个阶段：光强高于75 mW/cm^2时,电池性能变化不大;当光强低于70 mW/cm^2时,电池性能衰减明显。这是由于随着光强的降低,RS（串联电阻）值和RSH（并联电阻）值都在升高。其中,RSH值的增大使得CIGS电池的弱光特性变好,但较小的RSH值并不能弥补RS所导致电池性能的衰退。最后,发现高Ga含量的CIGS薄膜电池（8.7%）比低Ga含量（6.9%）的电池弱光特性好。
The parameters of Cu （In, Ga） Se： （CIGS） thin-film solar cells under different irradianee conditions （from 10 mW/cm^2 to 100 mW/cm^2 ） were reported in this paper. By lowering the irradiance from standard test conditions towards 10 mW/cm^2, the performance of the cells is gradually reduced. This decline isn＇t notable when the irradiance is above 75 mW/cm^2, and becomes obvious when the irradiance is below 70 mW/cm^2. Moreover, comparing to low Ga-content （6.9%） cell, the high Ga-content （8.7%） has the better performance under low irradiance. Further investigation shows that the series resistance （RS ） and parallel resistance （RSH） are all increasewith decreasing of irradiance. The latter behavior is benefit for the cell, but the value of RSH is too low to make up for the performance decline of the CIGS cells.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2009年第3期576-580,共5页
Journal of Synthetic Crystals
基金
国家高技术发展计划(863)项目资助(No.2001AA513020)
关键词
CIGS薄膜
太阳电池
光强特性
弱光特性
Cu （ In, Ga） Se2 thin film
solar cell
irradiance characters
low irradance performance
