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摘要

基于钙钛矿太阳能电池材料独特的光电特性, 特别是光电转换效率在初期短时间内的快速提升, 使其成为当前光伏领域中最富吸引力的光吸收材料之一. 然而, 近年来转换效率的增长步入缓慢阶段, 同时材料的长期稳定性也成为商业化应用的关键挑战, 这些问题背后的物理机制与材料缺陷密切相关. 为进一步提高电池效率和结构稳定性, 必须深刻理解和精准地掌握这些缺陷的特性. 本文全面回顾了钙钛矿材料中各类缺陷对光伏性能和稳定性的影响, 包括传统刚性模型缺陷、非常规性缺陷、复合型缺陷、离子迁移和缺陷对载流子寿命的影响, 论述了缺陷与材料结构稳定性之间的紧密关联性, 并对未来关于缺陷的研究方向进行了展望.

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Abstract

Perovskite solar cell material becomes one of the most attractive light absorbing materials in the photovolatic field due toits unique photoelectric characteristics, especially the rapid improvement of photoelectric conversion efficiency in the initial short period of time. However, in recent years, the growth of conversion efficiency has entered a slow stage, posing a challenge for subsequent development. In addition, the long-time stability of material has become a key barrier to widespread commerical applications. The emergence of these problems is closely related to the inevitable defects in the material in preparation process, because defect is usually regarded as one of the key factors hindering the improvement of photovolatic performance and materical stability. Therefore, a comprehensive understanding of the inherent defects of material is essential to improve cell efficiency and maintain long-time structural stability. In this paper, the effects of defects in perovskite material on photovolatic performance and stability are discussed in many aspects, including the traditional rigid defects, unconventional defects, complex defects, and ion migration. Second, this work also delves into how defects affect carrier lifetime and highlights their role in determining the overall cell performance. Such insights are very important in designing effective strategies to mitigate the adverse effects of defects on material performance and stability. Finally, we discuss the complex relationship between defects and structural stability, and recognize that the defects are a key factor affecting the long-term robustness of perovskite solar cells. The understanding of the mechanism behind the focus problems will help researchers achieve new ideas to improve the efficiency and duraibility of perovskite solar cell technology. Overall, this review not only provides the current state of knowledge on defects in perovskite materials, but also illustrates further research directions. By revealing the complex interplay between defects, photovoltaic performance and structural stability, researchers can find a way to break through the current limitations and realize the potential value of perovskite solar cell technology in the commercial applications. Thiswork aims to spark an in-depth discussion of this issue and further explore and innovate in this promising field.

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作者及机构信息

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通信作者:段香梅,duanxiangmei@nbu.edu.cn; 尹万健,wjyin@suda.edu.cn

基金项目:国家自然科学基金(批准号: 12204256, 12147121)和宁波市甬江人才工程资助的课题.

Authors and contacts

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Corresponding author:Duan Xiang-Mei,duanxiangmei@nbu.edu.cn; Yin Wan-Jian,wjyin@suda.edu.cn

Funds:Project supported by the National Natural Science Foundation of China (Grant Nos. 12204256, 12147121) and the Ningbo Yongjiang Talent Programme, China.

文章全文: translate this paragraph

参考文献

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施引文献

下载: 全尺寸图片幻灯片

Defect complex	Decomposition	Binding energy/eV
$ {\rm{P}\rm{b}}_{\rm{I}}^{0} $	$ {{\mathrm{V}}}_{{\mathrm{P}}{\mathrm{b}}}^{0} $+$ {{\mathrm{I}}}_{{\mathrm{i}}}^{0} $	–0.850
$ {\rm{P}\rm{b}}_{\rm{I}}^{0} $	$ {{\mathrm{V}}}_{{\mathrm{P}}{\mathrm{b}}}^{-1} $+$ {{\mathrm{I}}}_{{\mathrm{i}}}^{+1} $	–0.170
$ {\rm{P}\rm{b}}_{\rm{I}}^{-2} $	$ {{\mathrm{V}}}_{{\mathrm{P}}{\mathrm{b}}}^{-1} $+$ {{\mathrm{I}}}_{{\mathrm{i}}}^{-1} $	0.850
$ {\rm{P}\rm{b}}_{\rm{I}}^{-2} $	$ {{\mathrm{V}}}_{{\mathrm{P}}{\mathrm{b}}}^{-2} $+$ {{\mathrm{I}}}_{{\mathrm{i}}}^{0} $	0.930
$ {\rm{P}\rm{b}}_{\rm{I}}^{-3} $	$ {{\mathrm{V}}}_{{\mathrm{P}}{\mathrm{b}}}^{-2} $+$ {{\mathrm{I}}}_{{\mathrm{i}}}^{-1} $	2.390
$ {\rm{I}}_{\rm{P}\rm{b}}^{0} $	$ {{\mathrm{V}}}_{{\mathrm{I}}}^{0} $+$ {{\mathrm{P}}{\mathrm{b}}}_{{\mathrm{i}}}^{0} $	–0.360
$ {\rm{I}}_{\rm{P}\rm{b}}^{+1} $	$ {{\mathrm{V}}}_{{\mathrm{I}}}^{+1} $+$ {{\mathrm{P}}{\mathrm{b}}}_{{\mathrm{i}}}^{0} $	0.190

下载: 导出CSV

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