Beyond current limits: a simulation study of 31.02% efficient tandem photovoltaics with novel oriented CsPbI3 and Ag2BeSnSe4

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science Pub Date : 2025-09-10 DOI:10.1007/s10853-025-11469-2

Mohamed Ait oufakir, Younes Chrafih, Habib Rozale, Khalid Rahmani, Omar Bajjou

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Abstract

The importance of crystal orientation in CsPbI₃ perovskites, recognized for their outstanding optoelectronic properties, including high absorption coefficients and tunable bandgaps, is investigated within a tandem perovskite solar cell structure featuring an ITO/ZnSe/CsPbI₃ top cell and an ITO/ZnSe/Ag₂BeSnSe₄ bottom cell. Among the studied orientations, through numerical simulations, we demonstrate that the orthogonal (010) configuration achieves the highest power conversion efficiency (PCE) of 21.88%. In contrast, the cubic (100) orientation exhibits the lowest PCE of 20.40%, highlighting the significance of structural anisotropy in photovoltaic performance. The tandem architecture, designed to exceed the Shockley–Queisser limit, demonstrates a remarkable PCE of 31.02%, with an open-circuit voltage (V_oc) of 2.006 V, a short-circuit current density (J_sc) of 17.5 mA/cm², and a fill factor (FF) of 88.3%. Analysis of the individual sub-cells reveals PCEs of 16% for the top CsPbI3 cell and 23.32% for the bottom Ag₂BeSnSe₄ cell, elucidating their contributions to the overall tandem efficiency. Furthermore, the study examines temperature-dependent performance, observing efficiency declines with rising temperatures and underscoring the importance of thermal management for device stability.

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超越电流限制：采用新型定向CsPbI3和Ag2BeSnSe4的31.02%效率串联光伏的模拟研究

CsPbI3钙钛矿具有优异的光电性能，包括高吸收系数和可调谐的带隙，研究了晶体取向在CsPbI3钙钛矿中的重要性，研究了ITO/ZnSe/CsPbI3顶电池和ITO/ZnSe/Ag2BeSnSe4底电池的钙钛矿太阳能电池结构。在研究的取向中，通过数值模拟，我们证明正交（010）配置的功率转换效率（PCE）最高，达到21.88%。相比之下，立方（100）取向的PCE最低，为20.40%，突出了结构各向异性对光伏性能的重要性。该串联结构设计超过了Shockley-Queisser极限，PCE达到了31.02%，开路电压（Voc）为2.006 V，短路电流密度（Jsc）为17.5 mA/cm2，填充系数（FF）为88.3%。单个亚电池的分析显示，顶部CsPbI3电池的pce为16%，底部Ag2BeSnSe4电池的pce为23.32%，阐明了它们对整体串联效率的贡献。此外，该研究还考察了与温度相关的性能，观察到效率随着温度的升高而下降，并强调了热管理对设备稳定性的重要性。

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.