物理化学学报 >> 2021, Vol. 37 >> Issue (4): 2008051.doi: 10.3866/PKU.WHXB202008051

所属专题: 金属卤化物钙钛矿光电材料和器件

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激光作用铅卤钙钛矿的机理与应用

王嘉鑫, 沈威力, 胡锦宁, 陈军(), 李晓明, 曾海波()   

  • 收稿日期:2020-08-19 录用日期:2020-09-11 发布日期:2020-09-16
  • 通讯作者: 陈军,曾海波 E-mail:chenjun@njust.edu.cn;zeng.haibo@njust.edu.cn
  • 作者简介:陈军,南京理工大学副教授,硕士生导师;长期研究激光与材料相互作用机理,激光材料直写技术,光电子器件等,主持国家自然科学基金青年基金、中国博士后基金、江苏省自然科学基金面上项目等
    曾海波,南京理工大学教授,博士生导师;长期从事量子点发光材料与光电显示技术研究,国家杰出青年基金获得者,国家“万人计划”领军人才,新型显示材料与器件工信部重点实验室创始人及主任
  • 基金资助:
    江苏省自然科学基金(BK20181296);国家自然科学基金(11502116);南京理工大学自主科研(30919011253)

Mechanisms and Applications of Laser Action on Lead Halide Perovskites

Jiaxin Wang, Weili Shen, Jinning Hu, Jun Chen(), Xiaoming Li, Haibo Zeng()   

  • Received:2020-08-19 Accepted:2020-09-11 Published:2020-09-16
  • Contact: Jun Chen,Haibo Zeng E-mail:chenjun@njust.edu.cn;zeng.haibo@njust.edu.cn
  • About author:Email:zeng.haibo@njust.edu.cn (H.Z.)
    Email: chenjun@njust.edu.cn (J.C.)
  • Supported by:
    the Natural Science Foundation of Jiangsu Province(BK20181296);the National Natural Science Foundation of China(11502116);the Fundamental Research Funds for the Central Universities(30919011253)

摘要:

近年来,铅卤钙钛矿纳米晶因其易制备,低成本,高性能等特性引起了人们极大的关注。钙钛矿纳米晶的光电性能优越应用潜力巨大,然而稳定性问题制约着它进一步发展,使其无法与已经商业化的应用相匹敌。针对钙钛矿材料的稳定性问题,人们展开了很多研究,其中一个方面就是光照稳定性。该方面的研究可以为制备高稳定性钙钛矿材料和器件奠定基础,还可以利用光照(特别是激光)来调控钙钛矿的结构和性能,拓展其在光电领域的全方位应用。本文专注于激光照射下钙钛矿的变化及其相关应用,首先综述了激光辐照铅卤钙钛矿时出现的变化现象以及微观机理;其次,基于这些变化机理,介绍了最近研究人员如何使用激光技术对钙钛矿薄膜和器件进行性能调控,以及激光直写钙钛矿技术的相关应用。

关键词: 铅卤钙钛矿, 激光, 光稳定性, 光电器件, 性能调控

Abstract:

In recent years, lead-halide perovskites, one of the most competitive material types in the field of semiconductors, has attracted widespread attention because of its easy preparation, low cost, and high performance. Lead-halide perovskites are a type of material with an ABX3 structure, in which A is an organic or inorganic monovalent cation, B is a divalent cation, and X is a halogen ion. Among them, the B-site ion and X-site ion form an octahedron, with the B-site ion occupying the center and the X-site ion located at the apex of the octahedron. This type of octahedron can undergo lattice changes such as rotation or tilt through the replacement of different halogen anions, which affects the material band gap. The octahedron is located in the center of a cube, which is composed of A-site ions. These structures constitute the basic unit of the perovskite. Compared with the widely used Ⅱ-Ⅵ or Ⅲ-Ⅴ semiconductor nanocrystalline materials, perovskite nanocrystals have great application potential owing to their superior optoelectronic performance. However, their stability problem restricts further development, making them unable to compete in commercial applications. Studies on the stability of perovskite materials began in 2009. It was discovered through experiments that perovskite materials would undergo irreversible degradation under the action of liquid polar solvents, which confirmed that humidity and air are important factors in perovskite degradation. With further research, the problem of illumination has also come to the surface. It was found through experiment that, when oxygen and humidity were excluded, the light condition could also have a certain negative impact on perovskite materials, and subsequently perform a certain repair effect. Research in this area can lay a foundation for the preparation of high-stability perovskite materials and devices, adjust the structure and performance of perovskite by lighting technology (especially laser irradiation), and expand its comprehensive application in the field of optoelectronics. This article focuses on the changes in perovskites under laser irradiation and the related applications. First, it reviews the unstable changes and micro-mechanisms that laser-irradiation induces in lead-halide perovskites, including accelerated degradation, repair of defects, segregation, phase transitions, and changes in the grain size. Second, based on these mechanisms, it explains how researchers have recently used laser-irradiation technology to control the performance of perovskite films and devices. In addition, it also introduces the application of the laser direct writing process in the fields of perovskite patterning and photoelectric detection. Finally, this paper summarizes the changes induced by the laser-irradiation illumination and applications of laser-irradiated lead-halide perovskites.

Key words: Lead halide perovskite, Laser, Photo-stability, Photoelectric device, Performance-regulation

MSC2000: 

  • O644