模拟太阳光与高空自然光条件下航天用三结砷化镓太阳电池光电性能测量对比

Comparison of Photoelectric Performance Measurements for GaInP/InGaAs/Ge Triple-Junction Space Solar Cells Based on Solar Simulator and High Altitude Natural Sunlight

针对航天用三结砷化镓太阳电池的光电性能测量,介绍了太阳模拟器法和高空气球法两种方法。阐述了太阳模拟器法的测量原理和关键量值的溯源路径,基于双光源稳态太阳模拟器和光谱失配分析技术,对航天用三结砷化镓太阳电池的光电性能进行了测量,获得了短路电流、开路电压和最大发电功率等关键参数及相应的温度系数。介绍了高空气球法测量技术,高空氦气球将三结砷化镓太阳电池搭载至海拔35 km以上的高空中,在高空自然太阳光下进行光电性能测量,采集了伏安特性数据及实时温度数据。对高空自然太阳光条件下测得的数据执行温度修正后,与地面太阳模拟器法所得的数据进行对比。结果显示,两种测量方法在短路电流、开路电压和最大发电功率上的最大相对偏差分别为2.61%、2.13%和1.63%,结果具有较好的一致性。

Aiming at the photoelectric performance measurement for GaInP/InGaAs/Ge triple-junction solar cells used in aerospace, we introduce the solar simulator method and the high altitude balloon method. The measurement principle of the solar simulator method and the traceability chain of key values are described. Based on the dual light source steady state solar simulator and the spectral mismatch analysis, the photoelectric performances of the GaInP/InGaAs/Ge triple-junction solar cells are measured, and the key parameters such as short circuit current, open circuit voltage, maximum power and their corresponding temperature coefficients are obtained. In addition, we introduce the high altitude balloon calibration method. The GaInP/InGaAs/Ge triple-junction space solar cells are carried by the Helium balloon to arrive at the altitude higher than 35 km and their photoelectric performances under high altitude natural sunlight are measured. Simultaneously, their current-voltage characteristic data and the real-time temperature data are collected. After temperature correction, the data collected under high altitude natural sunlight is compared with that by the solar simulator method. The results show that the maximum relative deviations in the short circuit current, open circuit voltage and maximum power are 2.61%, 2.13% and 1.63%, respectively. It means that there is a good consistency between these results of the two measurement methods.