The development of >28% efficient triple-junction space solar cells at Emcore Photovoltaics
The development of >28% efficient triple-junction space solar cells at Emcore Photovoltaics
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发表时间：
2003-05
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通讯作者：
M. Stan;D. Aiken;P. Sharps;J. Hills;B. Clevenger;N. Fatemi
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作者：
M. Stan;D. Aiken;P. Sharps;J. Hills;B. Clevenger;N. Fatemi
自1999年以来，Emcore Photopolics一直在批量生产用于航天器的高效多结太阳能电池。Emcore目前的传统产品是先进的三结（ATJ）n/p InGaP/InGaAs/Ge太阳能电池。ATJ电池在空气质量为零（AM 0）的照明条件下表现出27.5%的最小平均转换效率，使其成为迄今为止市场上效率最高的飞行电池。一个船舶批次中飞行单元的效率范围约为26.0%至29.5%。新版本的ATJ电池也在Emcore批量生产，采用单片集成p/n GaAs旁路二极管。这个细胞被称为ATJM。使用ATJM电池作为基线平台，正在开发一种优化的太阳能电池，其在机械上与传统的ATJM电池相同，但表现出约28.5%的最小平均效率。第二代ATJM的开发批次在照明AM 0条件下表现出典型的BOL性能参数：Voc为2，650 mV，Jsc为17.3 mA/cm/sup 2/，填充因子为84%。在本文中，ATJ和ATJM电池的制造方面，以及第二代ATJM太阳能电池的发展方面将被介绍。
Emcore Photovoltaics has been in volume production of high-efficiency multi-junction solar cells for spacecraft applications since 1999. Emcore's current heritage product is the advanced triple-junction (ATJ) n/p InGaP/InGaAs/Ge solar cell. The ATJ cell exhibits a beginning-of-life (BOL) minimum average conversion efficiency of 27.5%, under air-mass zero (AM0) illumination conditions, making it the highest efficiency flight cell available in the market to date. The efficiencies of flight cells in a ship lot range from approximately 26.0% to 29.5%. A new version of the ATJ cell that is also in volume production at Emcore, incorporates a monolithically integrated p/n GaAs bypass diode. This cell is called the ATJM. Using the ATJM cell as the baseline platform, an optimized solar cell is being developed that is mechanically identical to the heritage ATJM cell, but exhibiting a minimum average efficiency of about 28.5%. The development lots of this 2nd generation ATJM exhibit typical BOL performance parameters of Voc of 2,650 mV, Jsc of 17.3 mA/cm/sup 2/, and fill factor of 84%, under illuminated AM0 conditions. In this paper, the manufacturing aspects of the ATJ & ATJM cells, as well as, the development aspects of the 2nd generation ATJM solar cells will be presented.