应用化学 ›› 2023, Vol. 40 ›› Issue (12): 1613-1622.DOI: 10.19894/j.issn.1000-0518.230189

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Cs2ZnCl4∶Ce3+,Mn2+的合成及其多模发光性能

郑天程, 李月, 刘钰铃, 马永波, 李希艳()   

  1. 南开大学电子信息与光学工程学院,光电子薄膜器件与技术研究所,天津 300381
  • 收稿日期:2023-07-05 接受日期:2023-11-18 出版日期:2023-12-01 发布日期:2024-01-03
  • 通讯作者: 李希艳
  • 基金资助:
    国家自然科学基金(22005152)

Synthesis and Multi-Mode Luminescence Properties of Cs2ZnCl4∶Ce3+,Mn2+

Tian-Cheng ZHENG, Yue LI, Yu-Ling LIU, Yong-Bo MA, Xi-Yan LI()   

  1. The Institute of Photoelectronic Thin Film Devices and Technology,College of Electronic Information and Optical Engineering,Nankai University,Tianjin 300381,China
  • Received:2023-07-05 Accepted:2023-11-18 Published:2023-12-01 Online:2024-01-03
  • Contact: Xi-Yan LI
  • About author:xiyan.li@nankai.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22005152)

摘要:

近年来,低维无铅金属卤化物由于其独特的光学性质、低毒性和优异的环境稳定性等优点受到了广泛关注。采用水热法成功制备Cs2ZnCl4∶Ce3+、Cs2ZnCl4∶Mn2+以及 Cs2ZnCl4∶Ce3+,Mn2+等微米晶,并利用X射线衍射仪、荧光光谱仪等表征手段对其物相和发光特性进行了系统性研究。 研究结果表明,Cs2ZnCl4微米晶为正交相零维结构,其发射光谱依赖于掺杂离子的激发波长,例如,Ce3+离子掺杂的Cs2ZnCl4微米晶在254 nm的激发条件下,其发射光谱峰位位于350 nm,对应于Ce3+离子4f-5d的跃迁; Mn2+离子掺杂的Cs2ZnCl4微米晶在361 nm的激发条件下,其发射光谱峰位位于530 nm,对应于四面体环境中Mn2+离子4T16A1的跃迁。 而在Ce3+、Mn2+离子共同掺杂的Cs2ZnCl4微米晶中,Ce3+离子和Mn2+离子在各自的特征激发峰位所对应的激发光下所得到的发射光谱都只包含各自的发射峰位,并不会导致另一离子的激发,这一特性很好地符合了激发波长依赖的特点,未来可以将该化合物应用于荧光防伪和信息加密领域。

关键词: 无铅钙钛矿, 离子掺杂, 激发光依赖

Abstract:

In recent years, low-dimensional lead-free metal halides have attracted extensive attention due to their unique optical properties, low toxicity and excellent environmental stability. In this paper, Cs2ZnCl4∶Ce3+, Cs2ZnCl4∶Mn2+ and Cs2ZnCl4∶Ce3+,Mn2+ microcrystals are prepared by hydrothermal method. The phase and luminescence characteristics of the microcrystals are characterized by X-ray diffractometer and fluorescence spectrometer. In a series of Ce3+ ions doped and Ce3+ and Mn2+ ions co-doped Cs2ZnCl4 microcrystals, Ce3+ ions emit at 254 nm in the ultraviolet region, and its emission peak is at 350 nm, corresponding to the 4f-5d transition of Ce3+ ions. In Cs2ZnCl4 microcrystals doped with Mn2+ ions and Ce3+ and Mn2+ ions, Mn2+ ions all exhibit green light emission in the visible region at 361 nm, and the emission peak is located at 530 nm, which corresponds to the 4T16A1 transition of Mn2+ ions in tetrahedral environment. In Cs2ZnCl4 microcrystals doped with Ce3+ and Mn2+ ions, the emission spectra of Ce3+ and Mn2+ ions only have their respective luminescence peaks corresponding to their respective excitation peaks, which is a phenomenon of excitation wavelength dependence. In addition, the compound can be applied to fluorescence anti-counterfeiting and information encryption applications in the future because of its obvious excitation wavelength dependence.

Key words: Lead-free perovskite, Ions doping, Excitation wavelength dependence

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