物理化学学报 >> 2024, Vol. 40 >> Issue (11): 2311011.doi: 10.3866/PKU.WHXB202311011

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卤化物钙钛矿的单双向离子迁移

李睿1,2,†, 刘欢1,2,†, 焦忆楠2,†, 秦胜建2, 孟婕1,2, 宋佳钰1,2, 闫融融1,2, 苏航1,2, 陈恒彬1,2, 尚子璇1, 赵晋津1,*()   

  1. 1 河北省能量转换材料与器件技术创新中心, 河北省无机纳米材料重点实验室, 薄膜太阳能电池材料与器件河北省工程研究中心, 河北师范大学化学与材料科学学院, 石家庄 050024
    2 石家庄铁道大学材料科学与工程学院, 石家庄 050043
  • 收稿日期:2023-11-08 修回日期:2023-12-17 录用日期:2024-01-08 发布日期:2024-01-12
  • 通讯作者: Email: jinjinzhao2012@163.com; jinjinzhao2023@hebtu.edu.cn (赵晋津)
  • 作者简介:

    †These authors contribute equally to this work.

  • 基金资助:
    国家自然科学基金(U2130128); 河北省自然科学基金-燕赵青年科学家专项(B2023205040); 京津冀基础研究合作专项(H2022205047); 京津冀基础研究合作专项(22JCZXJC00060); 京津冀基础研究合作专项(E3B33911DF); 中央引导地方科技发展资金(216Z4302G); 河北省市场监管局科技计划(2023ZC03); 河北省创新能力提升计划(22567604H); 河北师范大学博士科研启动基金(L2023B18)

Emerging Irreversible and Reversible Ion Migrations in Perovskites

Rui Li1,2, Huan Liu1,2, Yinan Jiao2, Shengjian Qin2, Jie Meng1,2, Jiayu Song1,2, Rongrong Yan1,2, Hang Su1,2, Hengbin Chen1,2, Zixuan Shang1, Jinjin Zhao1,*()   

  1. 1 Hebei Technology Innovation Center for Energy Conversion Materials and Devices, Hebei Key Laboratory of Inorganic Nanomaterials, Engineering Research Center of Thin Film Solar Cell Materials and Devices, Hebei Province, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, China
    2 School of Materials Science and Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
  • Received:2023-11-08 Revised:2023-12-17 Accepted:2024-01-08 Published:2024-01-12
  • Contact: Email: jinjinzhao2012@163.com; jinjinzhao2023@hebtu.edu.cn (Jinjin Zhao)
  • Supported by:
    the National Natural Science Foundation of China(U2130128); Yanzhao Young Scientist Project from Natural Science Foundation of Hebei Province(B2023205040); Basic Research Cooperation Special Foundation of Beijing-Tianjin-Hebei Region(H2022205047); Basic Research Cooperation Special Foundation of Beijing-Tianjin-Hebei Region(22JCZXJC00060); Basic Research Cooperation Special Foundation of Beijing-Tianjin-Hebei Region(E3B33911DF); Central Government Guiding Local Science and Technology Development Project(216Z4302G); Hebei Administration for Market Supervision Science and Technology Project List(2023ZC03); Innovation Capability Improvement Plan Project of Hebei Province(22567604H); Ph.D Scientific Research Start-up Fund of Hebei Normal University(L2023B18)

摘要:

卤化物钙钛矿材料以其卓越的可见光吸收、光电转换特性、可调的能级结构以及低能耗等特点,在薄膜太阳能电池、发光显示和生物医药领域具有广泛应用的潜力。然而,钙钛矿中复杂的离子迁移过程是导致器件能量转换效率低和稳定性差的关键因素,从而限制了其商业化进程。近年来,科学家们对钙钛矿中离子迁移条件和抑制离子迁移的方法进行了大量研究。本文从能量势垒角度创新性地探讨离子迁移问题,全面综述了钙钛矿材料中不可逆的单向离子迁移和可逆的双向离子迁移的基本概念和形成机制。随后,分析了不可逆的单向离子迁移导致钙钛矿降解的机理。进一步解析了在外加力、电场、光场和热场等外场作用下的双向可逆离子迁移现象,并探讨了调控离子迁移的策略。最后,从能级的角度揭示了钙钛矿中离子迁移作用,通过有效调控离子迁移提升钙钛矿器件的光电转换性能,为促进钙钛矿光电器件的商业化应用提供参考。促进其商业化应用。

关键词: 卤化物钙钛矿, 太阳能电池, 离子迁移, 单向不可逆离子迁移, 双向可逆离子迁移

Abstract:

Metal halide perovskite (MHP) materials show great prospects in applications such as solar cells, luminescent displays, and biomedicines, owing to their outstanding visible light absorption, photoelectric conversion, adjustable energy level structure, and low energy consumption. Their exceptional properties, such as high visible light absorption, efficient photoelectric conversion, adjustable energy level structure, and low energy consumption, have attracted significant attention. However, the presence of ion migration in MHPs has been identified as a critical challenge, leading to reduced energy conversion efficiency and device instability. Overcoming this obstacle is crucial for the commercialization of perovskite-based technologies. In recent years, extensive research has been conducted to understand the conditions and mechanisms of ion migration in perovskite materials, as well as develop strategies to mitigate its adverse effects. This paper adopts a dialectical perspective on ion migration, with a specific focus on energy barriers. A comprehensive review is provided, covering the fundamental concepts and formation mechanisms of both irreversible unidirectional and reversible bidirectional ion migrations. This paper begins by presenting a detailed summary of the degradation processes caused by irreversible unidirectional ion migrations phenomena induced by external fields, including illumination, stress/strain, thermal and electrical fields. Understanding the underlying mechanisms of such degradation is essential to address the stability concerns associated with perovskite devices. Moreover, the overview of bidirectional reversible ion migration phenomena in perovskite is presented. The cyclic formation and restoration of Schottky barriers at the interface can significantly influence the photoelectrical properties and impact the overall performance of perovskite devices. Various strategies for regulating ion migrations under external fields are discussed, aiming to enhance device stability and performance. By understanding the energy landscape and migration pathways, researchers can develop effective strategies to control and optimize ion migrations, ultimately improving the photoelectric conversion performance of perovskite devices. This paper provides comprehensive analysis of ion migration in perovskite materials, addressing fundamental concepts, ion migration mechanisms, and strategies for regulating ion migrations. By providing a clear understanding of the challenges associated with ion migration, this work contributes to the advancement of perovskite-based technologies and facilitates their commercialization. Ultimately, the optimization of ion migration control will lead to improved performance and stability of perovskite devices, enabling their widespread adoption in various applications.

Key words: Halide perovskite, Solar cells, Ion migration, Irreversible unidirectional ion migration, Reversible bidirectional ion migration