聚光多结太阳电池电极优化设计

THEOPTIMALDESIGN OF GRID LINE FOR THE HIGH-CONCENTRATION MULTIJUNCTION SOLAR CELL

通过分析太阳电池串联电阻r_s的组成,研究受光面平行栅状电极线宽W_L、间距W_s对电池填充因子FF及短路电流I_(sc)的影响。结果表明:相同电极线宽及厚度下,减小电极间距可提高填充因子,但同时会降低短路电流,因此需设计合理的电极间距,使填充因子与短路电流乘积最大;在相同电极厚度及电极遮光面积的前提下,减小电极线宽,可大幅缩小电极间距,从而在保证相同电极遮光面积(即相同短路电流)的前提下大幅提高填充因子。实验研究的聚光型GaInP/GaInAs/Ge多结电池在1000倍聚光条件下,电池填充因子为88.1%,光电转换效率为39.58%。

This paper focus on the influence of the width and distance of the grid lines for the fill factor （FF）and the short current （Isc） of the high-concentration multijunction solar cell, and the composition of the series resistance of the solar cell was studied. The results indicated. That, the fill factor（FF） increases with decreasing the distance of the grid lines, however in the same time, decreasing the Short-circuit Current Isc. so we should make a choice of the distance of the grid lines to maximize the product of I.o and FF, and the FF increases with decreasing the width of the grid lines, the efficiency of the triple junction （GaInP/GaAs/Ge）solar cell upto 39.58%, and the FF upto 88.1% under 1000 suns.