Here, we first visualize the achievable global efficiency for single-junction crystalline silicon cells and demonstrate how different regional markets have radically varied requirements for Si wafer thickness and injection level. Our findings showed that 219 g/kW of polysilicon can be conserved while producing slightly more electricity when c- Si cells are manufactured based on the global geographical market instead of standard test conditions. Then, we investigate the bifacial silicon cell and show that its optimal wafer thickness should be 1.67–2.89 times thicker than its monofacial counterpart, depending on the geographical region. Further, we study a double-junction two-terminal Si-based cell, reevaluate its theoretical limit as 42.8%, and illustrate that globally, tandem cells’ efficiency will only be slightly decreased when significantly reducing the bottom cell Si wafer thickness (−0.3%/mm). The outcomes of this study offer a blueprint to strategically design solar cells for target geographic markets, ensuring the conservation of substantial polysilicon volumes.

在这里，我们首先可视化单结晶体硅电池可实现的全球效率，并展示不同区域市场对硅片厚度和注入水平的要求如何截然不同。我们的研究结果表明，当根据全球地理市场而不是标准测试条件制造晶硅电池时，可以节省 219 g/kW 的多晶硅，同时产生略多的电力。然后，我们研究了双面硅电池，结果表明其最佳晶圆厚度应是单面硅电池的 1.67-2.89 倍，具体取决于地理区域。此外，我们研究了双结两端硅基电池，重新评估其理论极限为42.8%，并说明在全球范围内，当大幅减少底部电池硅片厚度（-0.3 ％/毫米）。这项研究的结果为针对目标地理市场战略性地设计太阳能电池提供了蓝图，确保节省大量多晶硅。