镍与金背电极的CdTe太阳电池的性能对比

Comparison in Performances of CdTe Solar Cellsbetween Ni and Au as Metal Back Electrodes

通过对比实验,研究了用Au和Ni作为背电极对CdTe太阳电池性能的影响和机理,用Ni替代Au作为背电极后的CdTe太阳电池短路电流密度有所增加,最大增幅达到40.31%,导致电池的转换效率增加,最大增幅达到30.57%.分析认为,用Ni替代Au作为背电极后能提高短路电流密度的主要原因在于光生电流密度大大增加.用Ni替代Au作为CdTe太阳电池的背电极,可以将电池的转换效率提高至少一个百分点.

The effects of Ni and Au back electrode on the performances of CdTe solar cells and thein mechanim have been studied experimently. After Ni substituted for Au, the conversion efficiency increases, and the biggest extent is 30.57%. The increase is due to the short circuit current density of CdTe solar cells with Ni back electrode being higher than that with Au (the biggest extent is 40.31%). Analysis shows that the main cause of short circuit current density increase is due to the increase of the light-generated current density (JL). Therefore, by Ni matal bock electrod, it is not only probable to increase the conversion efficiencies of cells by at least 1%, but also rather promising to reduce cost in cosmical production.