中国物理B ›› 2024, Vol. 33 ›› Issue (3): 38501-038501.doi: 10.1088/1674-1056/ad1480
Zhaoyao Pan(潘赵耀), Jinpeng Yang(杨金彭), and Xiaoshuang Shen(沈小双)†
Zhaoyao Pan(潘赵耀), Jinpeng Yang(杨金彭), and Xiaoshuang Shen(沈小双)†
摘要: Peng et al. [Science 379 683 (2023)] reported an effective method to improve the performance of perovskite solar cells by using thicker porous insulator contact (PIC)-alumina nanoplates. This method overcomes the trade-off between the open-circuit voltage and the fill factor through two mechanisms: reduced surface recombination velocity and increased bulk recombination lifetime due to better perovskite crystallinity. From arguments of drift-diffusion simulations, we find that an increase in mobility and carrier recombination lifetime in bulk are the key factors for minimizing the resistance-effect from thicker PICs and achieving a maximum power conversion efficiency (PCE) at approximately 25% reduced contact area. Furthermore, the partially replacement of perovskite films with thicker PICs would result in a reduction in short-current density, but the relative low refractive index of the PICs imbedded into the high refractive index perovskite creates light trapping structures that compensate for this loss.
中图分类号: (Semiconductor-device characterization, design, and modeling)