Improved modeling of photoluminescent and electroluminescent coupling in multijunction solar cells
Improved modeling of photoluminescent and electroluminescent coupling in multijunction solar cells
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DOI：
10.1016/j.solmat.2015.06.036
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发表时间：
2015-12-01
影响因子：
6.9
通讯作者：
Green, Martin A.
中科院分区：
文献类型：
--
作者：
Lan, Dongchen;Geisz, John E.;Green, Martin A.
III-V族多结太阳能电池串联电池堆的性能持续快速提高，这既是通过提高电池堆中单个电池的性能，又是通过增加堆叠电池的数量。随着这些单个电池的辐射效率的提高，堆叠电池之间的辐射耦合不仅在电池设计中变得越来越重要，而且在准确的效率测量以及在现场变化的光谱条件下确定电池和系统的性能方面也变得越来越重要。过去的建模主要集中在电池之间的电致发光耦合，尽管光致发光耦合对于在其最大功率点电压附近或低于最大功率点电压或在结缺陷重组很明显时运行的电池很重要。建议对早期模型进行扩展，以允许包含发光耦合的这一不可忽略的分量。通过测量单结电池和双结电池密切相关的外部发射来验证改进的模型。 (c) 2015 Elsevier B.V. 保留所有权利。
The performance of tandem stacks of Group III-V multijunction solar cells continues to improve rapidly, both through improved performance of the individual cells in the stack and through increase in the number of stacked cells. As the radiative efficiency of these individual cells increases, radiative coupling between the stacked cells becomes an increasingly important factor not only in cell design, but also in accurate efficiency measurement and in determining performance of cells and systems under varying spectral conditions in the field. Past modeling has concentrated on electroluminescent coupling between the cells, although photoluminescent coupling is shown to be important for cells operating near their maximum power point voltage or below or when junction defect recombination is significant. Extension of earlier models is proposed to allow this non-negligible component of luminescent coupling to be included. The refined model is validated by measurement of the closely related external emission from both single and double junction cells. (c) 2015 Elsevier B.V. All rights reserved.