The rapid advancement of organo-metal halide perovskite solar cells has led to a certified power conversion efficiency (PCE) of >25%. However, their ability to be implemented and commercialized on a large scale is currently limited due to the presence of toxic elements and the costly hole transport material (HTM) in the highly efficient cells. In the present work, a theoretical study on lead-free, environmental-friendly CsGeI₃ based solar cell (SC) is demonstrated. Factors influencing the device parameters, such as thickness, doping, and defect concentration, have been thoroughly investigated to better understand material properties. With optimal material properties, the simulation results demonstrated 10.8% optimized PCE, J_sc of 22.08 mAcm⁻², V_oc of 0.667 V, and FF of 73.49%. These findings open up a new path for CsGeI₃ as light-absorbing material to achieve clean, renewable energy.

有机金属卤化物钙钛矿太阳能电池的快速发展已导致认证的功率转换效率 (PCE) > 25%。然而，由于在高效电池中存在有毒元素和昂贵的空穴传输材料（HTM），它们的大规模实施和商业化的能力目前受到限制。在目前的工作中，展示了基于无铅、环保的 CsGeI ₃太阳能电池 (SC)的理论研究。已经彻底研究了影响器件参数的因素，例如厚度、掺杂和缺陷浓度，以更好地了解材料特性。具有最佳材料特性的仿真结果表明，优化的 PCE 为 10.8%，J _sc为 22.08 mAcm ^-2 , V_oc为 0.667 V，FF 为 73.49%。这些发现为 CsGeI ₃作为吸光材料实现清洁、可再生能源开辟了一条新途径。