Efficient and Highly Stable Lateral Perovskite Single‐Crystal Solar Cells through Crystal Engineering and Weak Ion Migration

• DOI: 10.1002/adfm.202313693
• Publication Date: 2024-05-13T14:30:48Z
• Authors: Dalin Li; Ning Li; Can Zou; Yu Zhong; Yaqian Qu; Shuang Yang; Lei Wang; Yimu Chen; Xiao Cheng; Xutang Tao; Osman M. Bakr; Zhaolai Chen
• Keywords: Formamidinium; Crystal (programming language)

Abstract The lateral device structure for perovskite solar cells (PSCs) has garnered significant attention, primarily due to its elimination of the need expensive transparent electrodes. However, performance devices, which are more sensitive crystal quality and charge carrier transport bottlenecks, lagged far behind predominant vertical PSCs. Herein, by modulating nucleation growth processes thin FA 0.75 MA 0.25 PbI 3 (FA = formamidinium; methylammonium) single crystals, improved, resulting in a power conversion efficiency (PCE) 12.64%, record Investigation device's stability reveals that iodide ion migration is suppressed reduction vacancy concentration combined with weak interface migration. It shown latter effect result perpendicular direction electric field Consequently, these single‐crystal PSCs display remarkable operational stability, retaining 100% their initial PCE after 1200 h steady‐state output at maximum point voltage (Vmpp) under 1 sun illumination. This work highlights advantages devices potential address key issues