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[PbX6]4− modulation and organic spacer construction for stable perovskite solar cells
Energy & Environmental Science ( IF 32.5 ) Pub Date : 2022-09-07 , DOI: 10.1039/d2ee02218d
Lian Wang , Bohong Chang , Hui Li , Lu Pan , yutong Wu , Zhen Liu , Long-Wei Yin

The unique lattice structure and chemical bonding nature of perovskites endow them with illustrious photovoltaic properties, which have enabled perovskite solar cells (PSCs) to achieve a power conversion efficiency (PCE) of 25.7%, approaching that of commercial silicon-based devices. However, the instability originating from the soft ionic lattice characteristics of perovskites makes the device lifespan much shorter than the industry demand of 20 years. Herein, the influence of the lattice structure on the stability of perovskites is thoroughly profiled from the perspectives of [PbX6]4− octahedra and organic spacers, which serve as a supporting skeleton and structural stabilizer, respectively. The crystal structure, corresponding photophysical properties and stability performance are first dissected, followed by a discussion on the essential roles of octahedra and organic spacers in the environmental degradation, ion migration, phase segregation behavior, lattice strain and phase transition. Furthermore, the typical strategies to enhance the intrinsic and extrinsic stability of perovskites are summarized with regard to octahedral modulation and organic spacer construction, including component engineering for octahedral reinforcement, management of lattice defects and stress, and dimensional design to stabilize the perovskite lattice. Based on this, several key scientific issues and promising future directions are presented to enhance the stability of PSCs and promote their commercialization.

中文翻译:

[PbX6]4− 调制和有机间隔结构用于稳定的钙钛矿太阳能电池

钙钛矿独特的晶格结构和化学键合特性赋予其卓越的光伏特性,使钙钛矿太阳能电池(PSC)的功率转换效率(PCE)达到 25.7%,接近商用硅基器件。然而,钙钛矿的软离子晶格特性导致的不稳定性使得器件的寿命远低于行业要求的 20 年。在此,从[PbX 6 ] 4−的角度全面分析了晶格结构对钙钛矿稳定性的影响八面体和有机间隔物,分别用作支撑骨架和结构稳定剂。首先剖析了晶体结构、相应的光物理性质和稳定性能,然后讨论了八面体和有机间隔物在环境退化、离子迁移、相偏析行为、晶格应变和相变中的重要作用。此外,总结了增强钙钛矿内在和外在稳定性的典型策略,包括八面体调制和有机间隔结构,包括八面体增强的组件工程、晶格缺陷和应力的管理,以及稳定钙钛矿晶格的尺寸设计。基于此,
更新日期:2022-09-07
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