Limiting efficiencies for photovoltaic energy conversion in multigap systems
Limiting efficiencies for photovoltaic energy conversion in multigap systems
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DOI：
10.1016/0927-0248(96)00015-3
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发表时间：
1996-09-01
影响因子：
6.9
通讯作者：
Araujo, GL
中科院分区：
文献类型：
--
作者：
Marti, A;Araujo, GL
与单间隙系统相比，多间隙系统能更好地匹配太阳光谱，因此作为光伏转换器效率更高。本文回顾了过去用于计算太阳能转化为功的极限效率的不同热力学方法。在这个热力学背景下，根据所做的假设，极限范围从85.4%到95.0%，详细平衡理论提供了一个更准确的光伏转换器模型。正如其他作者已经指出的那样，对于具有无限数量的细胞的系统，它导致86.8%的极限。然而，在这项工作中，我们使用角度和能量限制的概念来强调该极限与光浓度无关，也研究了具有有限数量电池的系统，发现其极限效率高于先前报道，包括AM1.5直接光谱的数据，以前从未计算过。
Multigap systems are better matched to the sun's spectrum than single gap systems and are, therefore, more efficient as photovoltaic converters. This paper reviews the different thermodynamic approaches used in the past for computing the limiting efficiency for the conversion of solar energy into work. Within this thermodynamic context, the limit ranges from 85.4% to 95.0% depending on the assumptions made, Detailed balance theory provides a more accurate model of the photovoltaic converter. It leads to a limit of 86.8% for a system with an infinite number of cells, as already pointed out by other authors. In this work, however, we use the concepts of angle and energy restriction to emphasize that this limit is independent of the light concentration, Systems with a finite number of cells are also studied and their limiting efficiency is found to be higher than previously reported, Data for AM1.5 Direct spectrum, never computed before, are included.