利用开路电压测量太阳电池外量子效率

USING OPEN-CIRCUIT VOLTAGE TO DETERMINE EXTERNAL QUANTUM EFFICIENCY OF SOLAR CELLS

首先利用太阳电池光照下的J-V特性,推导短路电流密度Jsc、开路电压Voc与光照面积和总面积的比值AΦ/AT之间的关系,分析利用短路电流密度测量外量子效率EQE(λ)SC的误差来源。并利用J-V特性将开路电压Voc表示的外量子效率EQE(λ)OC与常规利用短路电流密度Jsc表示的外量子效率EQE(λ)SC利用fEQE因子相关联。最后,测量不同面积晶体硅太阳电池的EQE(λ)OC、EQE(λ)SC并与PC1D模拟的EQE(λ)SCPC1D曲线进行对比,得到相应结论。该测试方法对提高太阳电池量子效率测试的准确性具有一定指导意义。

The errors of EQE（ λ ） sc was deduced for the areas of test sample being larger than areas of illumination. However, the errors can be minimized using open-circuit voltage to measure EQE （λ）oc of solar cells. And the expressions of EQE （λ）oc were explored using J-V characteristics and open-circuit voltage of solar cells. The EQE（ λ ） sc can be expressed by EQE（ λ ） oc and EQE At last, curves of EQE（ λ ） oc and EQE（ λ ） sc of different crystalline silicon solar cells were measured, and then they were compared with EQE（ λ）SCPC1D simulated by PC1D. The method can minimize the errors of the EQE（λ ） measurements of solar cells.