Optical Designing of Perovskite Solar Cells
Optical Designing of Perovskite Solar Cells
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钙钛矿太阳能电池的光学设计
DOI：
10.1109/jphotov.2022.3141344
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发表时间：
2022
影响因子：
3
通讯作者：
D. Ghosh
中科院分区：
文献类型：
--
作者：
S. Rani;Arun Kumar;D. Ghosh
本文以一种以碘化铅甲基铵为活性层、以TiO_2/Ag/TiO_2（达特）为透明电极的平面结构太阳能电池为例，详细介绍了钙钛矿太阳能电池的光学设计。在所提出的电极中，外涂层TiO 2层不仅降低了银层的固有反射，而且还充当了电子传输层。进行TE的光谱之间的比较研究，并且已经观察到，用于89.8%的最高透射率的底涂层和外涂层TiO 2层的最佳厚度组合不对应于最佳器件性能。我们发现，这是由于较低的光场密度内的有源层，特别是对于较长的波长制度。除此之外，我们还借助三维散点图，同时优化了电子传输层、活性层和空穴传输层的厚度，以获得最大的电流密度。我们发现，对于基于TAT的器件，75、600和30 nm分别是外涂层TiO 2、钙钛矿层和螺-OMeO 2的最佳厚度，以获得23.28 mAcm−2的最大电流密度，这与基于ITO（氧化铟锡）的器件24.14 mAcm − 2相似。这篇文章给出了深入了解达特电极的潜力，它可以用作替代传统使用的ITO作为TE。此外，光学建模表明，通过优化堆叠中关键层的厚度，可以获得高性能的PvSC。
We report a detailed optical designing of perovskite solar cells (PvSCs) taking an example of a planar architecture cell having methylammonium lead iodide as active layer and incorporating a transparent electrode (TE) consisting of TiO2/Ag/TiO2 (TAT). In the proposed electrode, the overcoat TiO2 layer not only reduces the inherent reflection of the silver layer but also acted as the electron transport layer. A comparative study between the optical spectra of the TE is performed and it has been observed that the best thickness combination of the undercoat and overcoat TiO2 layer for the highest transmittance of 89.8% does not correspond to the best device performance. We found that this is due to the lower optical field density within the active layer especially for the longer wavelength regime. Besides this, with the help of 3-D scatter plots, we have optimized the thickness of the electron transporting, active, and hole transporting layer simultaneously for getting a maximum current density. We found that for the TAT-based device 75, 600, and 30 nm are the optimized thicknesses of overcoat TiO2, perovskite layer, and spiro-OMeTAD, respectively, for getting a maximum current density of 23.28 mAcm−2 which is similar to ITO (indium tin oxide) based device of 24.14 mAcm−2. This article gives insight into the potential of TAT electrode which can be used as an alternative to conventionally used ITO as TE. Additionally, optical modeling demonstrates that by optimizing the thickness of the critical layers in the stack, it is possible to get high-performance PvSCs.