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Solar spectral variations and their influence on concentrator solar cell performance

机译:太阳光谱变化及其对聚光太阳能电池性能的影响

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A comparative study is performed to quantify the difference in efficiency and spectral sensitivity between a tandem junction and its spectrum splitting parallel junction counterpart. Direct normal solar spectra in a representative sunny site, Tucson, Arizona are calculated using the SPCTRAL2 model at 15-minute intervals throughout a year with real-time meteorological data input. The corresponding efficiencies of the two junctions under 500X concentration at cell temperatures deduced from thermal modeling with real-time ambient temperatures are computed. Both junction structures comprise the same materials, InGaP, GaAs and Ge, and are each optimized to the AM1.5D standard spectrum and cell temperature of 25℃, under which the parallel junction achieves a 1.0% absolute (and 2.5% relative) higher efficiency than the tandem junction. The two junctions are compared for their hourly, daily, and yearly average efficiencies. It is found that the yearly average efficiency of the parallel junction is 2.65% absolute (and 7.31% relative) higher than that of the tandem junction.
机译:进行了一项比较研究,以量化串联结及其频谱分裂平行结对应物之间的效率和光谱灵敏度差异。使用SPCTRAL2模型,以每年15分钟的间隔,并使用实时气象数据输入,来计算亚利桑那州图森市一个典型的晴天站点中的直接正常太阳光谱。计算了在使用实时环境温度的热模型推导得出的电池温度下,在500X浓度下两个结的相应效率。两种结结构均由相同的材料InGaP,GaAs和Ge组成,并分别针对AM1.5D标准光谱和25℃的电池温度进行了优化,在此条件下,并联结的绝对效率提高了1.0%(相对值提高了2.5%)比串联连接。比较这两个路口的每小时,每日和每年的平均效率。发现并联结的年平均效率比串联结的年平均效率高2.65%(相对而言为7.31%)。

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