1. Excitation wavelength-dependent tunable color Te4+-doped Cs2ZrCl6 vacancy-ordered perovskites for optical anti-counterfeiting.
- Author
-
Qi, Yu, Xin, Chengyue, Zhang, Wenjun, Li, Zhongfa, Chen, Zihan, and Duan, Zhongyu
- Subjects
PEROVSKITE ,PRECIPITATION (Chemistry) ,ULTRAVIOLET lamps ,OPTICAL materials ,COLOR ,LUMINESCENCE - Abstract
Te
4+ -doped Cs2 ZrCl6 vacancy-ordered perovskites with excitation wavelength-dependent tunable color have been synthesised by a simple precipitation method at room temperature, with two luminescent centres originating from the Te4+ and the STE (self-trapping exciton) of the Cs2 ZrCl6 itself, respectively. They exhibit two different emission characteristics at 254 nm and 365 nm excitation wavelengths. At an excitation wavelength of 254 nm, the emission characteristics allow Te4+ -doped Cs2 ZrCl6 to exhibit tunable emission from blue to white to yellow under the control of Te4+ doping. And the excitation wavelength of 365 nm shows yellow emission. Te4+ doped Cs2 ZrCl6 phosphors were used for optical anti-counterfeiting, and the anti-counterfeiting patterns were well distinguished under 254 nm and 365 nm UV lamps, demonstrating the potential of this excitation wavelength-dependent tunable color material for optical anti-counterfeiting applications. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF