论文标题
厚量子井超级晶格实现了39.5％的陆地和34.2％空间效率的三连接太阳能电池
Triple-junction solar cells with 39.5% terrestrial and 34.2% space efficiency enabled by thick quantum well superlattices
论文作者
论文摘要
多期太阳能电池设计由理论最佳带隙组合以及使用这些带盖的材料的现实局限性指导。例如，尽管其近乎完美的材料质量，但三连接III-V多肺太阳能电池通常将GAAS用作中间单元，尽管其带隙高于全球光谱的最佳频率。在这里，我们使用具有出色的电压和吸收的厚Gainas/gaasp应变量子井（QW）太阳能电池来修改GAAS带隙。这些高性能QW被纳入由Gainp Top细胞，Gainas/gaasp QW中间细胞和不匹配的Gainas底部细胞组成的三个倒的变质多态多态多型设备中，每个单元均已高度优化。我们在全球和太空光谱下分别证明了三连接效应为39.5％和34.2％，它们高于先前创纪录的六级装置。
Multijunction solar cell design is guided by both the theoretical optimal bandgap combination as well as the realistic limitations to materials with these bandgaps. For instance, triple-junction III-V multijunction solar cells commonly use GaAs as a middle cell because of its near-perfect material quality, despite its bandgap being higher than optimal for the global spectrum. Here, we modify the GaAs bandgap using thick GaInAs/GaAsP strain-balanced quantum well (QW) solar cells with excellent voltage and absorption. These high-performance QWs are incorporated into a triple-junction inverted metamorphic multijunction device consisting of a GaInP top cell, GaInAs/GaAsP QW middle cell, and lattice-mismatched GaInAs bottom cell, each of which has been highly optimized. We demonstrate triple-junction efficiencies of 39.5% and 34.2% under the global and space spectra, respectively, which are higher than previous record six-junction devices.
