Physically and Chemically Stable Molybdenum‐Based Composite Electrodes for p–i–n Perovskite Solar Cells

材料科学 电极 钙钛矿(结构) 纳米技术 化学工程 卤化物 金属 光电子学 无机化学 冶金 工程类 物理化学 化学
作者
Rundong Fan,Wei Sun,Congmeng Li,Yihua Chen,Haipeng Xie,Yongli Gao,Yue Ma,Zongyang Peng,Zijian Huang,Ruiyang Yin,Fengtao Pei,Wentao Zhou,Yuetong Wu,Huifen Liu,Kailin Li,Tinglu Song,Dechun Zou,Huachao Zai,Hui Li,Qi Chen,Sheng Wang,Huanping Zhou
出处
期刊:Advanced Materials [Wiley]
卷期号:36 (18) 被引量:4
标识
DOI:10.1002/adma.202309844
摘要

Abstract Metal halide perovskite solar cells (PSCs) have garnered much attention in recent years. Despite the remarkable advancements in PSCs utilizing traditional metal electrodes, challenges such as stability concerns and elevated costs have necessitated the exploration of innovative electrode designs to facilitate industrial commercialization. Herein, a physically and chemically stable molybdenum (Mo) electrode is developed to fundamentally tackle the instability factors introduced by electrodes. The combined spatially resolved element analyses and theoretical study demonstrate the high diffusion barrier of Mo ions within the device. Structural and morphology characterization also reveals the negligible plastic deformation and halide‐metal reaction during aging when Mo is in contact with perovskite (PVSK). The electrode/underlayer junction is further stabilized by a thin seed layer of titanium (Ti) to improve Mo film's uniformity and adhesion. Based on a corresponding p–i–n PSCs (ITO/PTAA/PVSK/C 60 /SnO 2 /ITO/Ti/Mo), the champion sample could deliver an efficiency of 22.25%, which is among the highest value for PSCs based on Mo electrodes. Meanwhile, the device shows negligible performance decay after 2000 h operation, and retains 91% of the initial value after 1300 h at 50–60 °C. In summary, the multilayer Mo electrode opens an effective avenue to all‐round stable electrode design in high‐performance PSCs.
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