Optical simulations of nanotextured perovskite/silicon tandem solar cell

Perovskite/silicon tandem solar cells (PSTSC) are amongst the most promising routes to increase the power conversion efficiency (PCE) of silicon-based solar cells. Many of the highly efficiency PSTSC use planar perovskite top cell layer stacks because of the compatibility with solution processing, which is the preferred fabrication process for perovskite solar cells. However, light management can further improve the optical performance of PSTSC. For example, smooth nanotextures can help to reduce reflective losses and increase the absorption of light in the absorber layers without compromising the compatibility with perovskite solution processing.
This database contains the results of optical simulations for different nanotexturing schemes for PSTSC. We studied three configurations: a planar perovskite top cell, a perovskite top cell with a textured rear side, and a fully textured perovskite top cell. As textures we used sinusoidal nanotextures, which were already successfully implemented in perovskite single-junction solar cells and also have already been successfully transferred into the front side of silicon bottom cells enabling carrier lifetimes above 10 milliseconds. Further, numerical studies already demonstrated the high theoretical potential of sinusoidal nanotextures.
The simulations were performed with the finite element method (FEM) for the wavelength range between We studied sinusoidal nanotextures with periods ranging from 500 nm to 1000 nm and with aspect ratios between 20% and 60%. The results presented in this database are the results of a global optimization using a Bayesian optimization algorithm.
The data is provided as a ZIP archive containing the absorption spectra and current densities stored as csv files. An overview of all the simulations is given in the files simulation_list.csv and simulation_overview.csv.

钙钛矿/硅叠层太阳能电池（Perovskite/silicon tandem solar cells, PSTSC）是提升硅基太阳能电池功率转换效率（power conversion efficiency, PCE）的最具潜力的技术路径之一。诸多高性能PSTSC采用平面钙钛矿顶电池层叠结构，这得益于其与钙钛矿太阳能电池优选的溶液加工工艺具备良好兼容性。然而，光管理技术可进一步优化PSTSC的光学性能。例如，平滑纳米纹理能够在不影响钙钛矿溶液加工工艺兼容性的前提下，降低反射损耗并提升吸收层对光的捕获效率。
本数据集收录了针对PSTSC不同纳米纹理方案的光学模拟结果。本次研究共设置三种构型：平面钙钛矿顶电池、带有纹理背侧的钙钛矿顶电池，以及全纹理钙钛矿顶电池。本次研究采用的纹理结构为正弦型纳米纹理，该结构已成功应用于钙钛矿单结太阳能电池，且已被成功移植至硅底电池的正面，可使载流子寿命突破10毫秒。此外，已有数值研究证实了正弦型纳米纹理的极高理论光学潜力。
本次模拟采用有限元法（finite element method, FEM）开展，所研究的正弦型纳米纹理周期范围为500 nm至1000 nm，宽高比介于20%至60%之间。本数据集收录的所有结果均通过贝叶斯优化算法完成全局优化所得。
本数据集以ZIP压缩包形式提供，内含以CSV格式存储的吸收光谱与电流密度数据。所有模拟的概览信息可参见simulation_list.csv与simulation_overview.csv文件。