Perovskite being a wide bandgap material has shown profound impact as an active material for the use of top cell in the tandem solar cell. However, finding a suitable low-bandgap material for the bottom cell of the perovskite associated tandem solar cell has always been a concern for researchers. Over the last decade, several materials for designing of the bottom cell have been reported as a combination to perovskite for superior efficiency. In this paper, a novel perovskite/Mg 2 Si based monolithic tandem solar cell is reported through numerical simulations using AFROS-HET v2.5. The reported device shows 25% efficiency prior to optimization. However, the structure of the device has been optimized to obtain better results in terms of efficiency by varying active layer thickness and using different electron/hole transport materials. About 8% improvement in efficiency has been noticed by the selection of optimum design parameters. Further, to account for the temperature reliability of the proposed design, the device is simulated for a temperature range of 300 K–450 K. This study highlights a drop-in open-circuit voltage ( V OC ) by a factor of about 0.1 V with an increase in temperature by about 50 K. Results clearly establish that structural and temperature variations significantly affect overall device performance. Results have been suitably analyzed so as to set a roadmap for further research work in this direction and explore the best of the characteristics of this unique tandem solar cell structure.

中文翻译：

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结构和温度变化对钙钛矿/Mg2Si基单片串联太阳能电池结构的影响

钙钛矿是一种宽带隙材料，作为在串联太阳能电池中使用顶部电池的活性材料已显示出深远的影响。然而，为钙钛矿相关串联太阳能电池的底部电池寻找合适的低带隙材料一直是研究人员关心的问题。在过去的十年中，已经报道了几种用于设计底部电池的材料与钙钛矿的组合以获得更高的效率。在本文中，通过使用 AFROS-HET v2.5 的数值模拟，报道了一种新型钙钛矿/Mg 2 Si 基单片串联太阳能电池。报告的设备在优化之前显示 25% 的效率。然而，通过改变有源层厚度和使用不同的电子/空穴传输材料，器件的结构得到了优化，以在效率方面获得更好的结果。通过选择最佳设计参数，效率提高了约 8%。此外，为了考虑所提出设计的温度可靠性，该器件在 300 K–450 K 的温度范围内进行了仿真。本研究强调了开路电压 (V OC ) 下降约 0.1 V随着温度升高约 50 K。结果清楚地表明结构和温度变化显着影响整体器件性能。对结果进行了适当的分析，以便为该方向的进一步研究工作制定路线图，并探索这种独特的串联太阳能电池结构的最佳特性。该器件在 300 K–450 K 的温度范围内进行仿真。本研究强调了开路电压 (V OC ) 下降约 0.1 V，温度升高约 50 K。结果清楚地表明结构和温度变化显着影响整体器件性能。对结果进行了适当的分析，以便为该方向的进一步研究工作制定路线图，并探索这种独特的串联太阳能电池结构的最佳特性。该器件在 300 K–450 K 的温度范围内进行仿真。本研究强调了开路电压 (V OC ) 下降约 0.1 V，温度升高约 50 K。结果清楚地表明结构和温度变化显着影响整体器件性能。对结果进行了适当的分析，以便为该方向的进一步研究工作制定路线图，并探索这种独特的串联太阳能电池结构的最佳特性。