Abstract Currently, an important concern in CPV is inhomogeneity of the light distribution on the cell introduced by the applied optical systems, which may affect system performance. In BICPV applications, the inhomogeneities can be much more severe because of design constraints introduced by the building incorporation. Additionally, one of the predominant loss mechanisms in CPV solar cells is perimeter recombination. In this study, the electrical parameters of CPV cells are investigated under inhomogeneous illumination intensity profiles. Partial shading is used as a model for extremely inhomogeneous illumination, while several shadow patterns are used to study the effect of perimeter recombination on the cell performance. As the latter occurs most strongly in GaAs subcells, shallow and deep junction GaAs CPV cells have been developed and subjected to these experiments, as well as commercial triple junction CPV cells. Deep junction GaAs cells are shown to perform significantly better under concentrated light than their shallow junction counterparts. A large degree of shading exceeding 70% has been found to cause only minor losses in the cell performance of 4%. Also, the cell performance is found to be independent of the location of illumination, in spite of perimeter recombination effects, because the current density spreads out. Clearly, increased illumination inhomogeneities caused by elaborate BICPV optical systems, do not inhibit the electrical performance strongly. As a consequence, a large degree of design freedom exists for the optical systems, which offers good opportunities to develop BICPV that meet all the design challenges of the built environment.

中文翻译：

---

部分遮蔽的 III-V 族聚光器太阳能电池性能

摘要 目前，CPV 中的一个重要问题是应用光学系统在电池上引入的光分布不均匀性，这可能会影响系统性能。在 BICPV 应用中，由于建筑结合引入的设计限制，不均匀性可能更加严重。此外，CPV 太阳能电池的主要损失机制之一是周长复合。在这项研究中，在不均匀的光照强度分布下研究了 CPV 电池的电参数。部分阴影用作极不均匀照明的模型，而几种阴影图案用于研究周边重组对电池性能的影响。由于后者在 GaAs 子电池中最为强烈，浅结和深结 GaAs CPV 电池以及商用三结 CPV 电池已经开发并进行了这些实验。深结 GaAs 电池在集中光下的性能明显优于浅结对应电池。已经发现超过 70% 的大量阴影仅导致 4% 的电池性能的轻微损失。此外，尽管存在周边复合效应，但发现电池性能与照明位置无关，因为电流密度会散开。显然，由精心设计的 BICPV 光学系统引起的照明不均匀性增加不会强烈抑制电气性能。因此，光学系统存在很大的设计自由度，