论文标题
钙钛矿/硅串联太阳能电池：发光耦合和双面关系的影响
Perovskite/silicon tandem solar cells: Effect of luminescent coupling and bifaciality
论文作者
论文摘要
市场为硅光伏的功率转换效率接近其理论限制。双面太阳能操作随着收获额外的光撞击模块背部和钙钛矿/硅串联装置架构是进一步提高有限区域的能量产量的最有希望的方法之一。在这里，我们在两个子细胞之间首次计算了单种体和双面操作中钙钛矿/硅串联太阳能电池的能量输出。对于能量产量计算，我们研究了在两者下的理想化太阳能电池，标准测试以及现实的天气条件，以及针对周期太阳能电池板阵列的详细照明模型。考虑到典型的实验光致发光量子屈服值，我们发现硅藻底部细胞可以通过发光偶联来利用钙钛矿顶部细胞中超过50％的过量电子孔对。结果，发光耦合在整体串联设备中强烈放松了顶部单细胞带隙的约束。结合双面操作，最佳的钙钛矿带隙从1.71 eV转移到已经存在高质量的钙钛矿材料的范围为1.60-1.65 eV范围。因此，结果可以改变为串联太阳能电池开发最佳的钙钛矿材料的范式。
The power conversion efficiency of the market-dominating silicon photovoltaics approaches its theoretical limit. Bifacial solar operation with harvesting additional light impinging on the module back and the perovskite/silicon tandem device architecture are among the most promising approaches for further increasing the energy yield from a limited area. Here, we calculate the energy output of perovskite/silicon tandem solar cells in monofacial and bifacial operation considering, for the first time, luminescent coupling between two sub-cells. For energy yield calculations we study idealized solar cells at both, standard testing as well as realistic weather conditions in combination with a detailed illumination model for periodic solar panel arrays. Considering typical, experimental photoluminescent quantum yield values we find that more than 50% of excess electron-hole pairs in the perovskite top cell can be utilized by the silicon bottom cell by means of luminescent coupling. As a result, luminescent coupling strongly relaxes the constraints on the top-cell bandgap in monolithic tandem devices. In combination with bifacial operation, the optimum perovskite bandgap shifts from 1.71 eV to the range 1.60-1.65 eV where already high-quality perovskite materials exist. The results can hence change a paradigm in developing the optimum perovskite material for tandem solar cells.
