Narrowband ultraviolet-B persistent luminescence from (Y, Gd)3Ga5O12:Bi3+ phosphors for optical tagging application. Issue 42 (15th October 2021)

• Record Type: Journal Article
• Authors: Liu, Jingwei; Liang, Yanjie; Yan, Shao; Chen, Dongxun; Miao, Shihai; Wang, Weili
• Is Part Of: Dalton transactions. Volume 50:Issue 42(2021)
• Page Start: 15413
• Page End: 15421
• Publication Date: 2021-10-15
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d1dt02568f
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : NB-UVB persistent luminescence of Gd 3+ by utilizing persistent energy transfer from Bi 3+ to Gd 3+ has been realized in (Y, Gd)3 Ga5 O12 :Bi 3+ garnets. The NB-UVB afterglow signal can be clearly monitored and imaged by using an UVB camera in a bright environment. Abstract : Luminescent materials that emit in the narrowband ultraviolet-B (NB-UVB; 310–313 nm) spectral region have attracted considerable attention due to their unique spectral features, which endow them with great potential applications in the fields of photochemistry and photomedicine. However, NB-UVB persistent luminescent materials are relatively lacking, especially materials that are excitable by natural sunlight. Here we report the NB-UVB persistent luminescence of Gd 3+ in (Y, Gd)3 Ga5 O12 :Bi 3+ garnets by making use of the persistent energy transfer from Bi 3+ to Gd 3+ . The optimal Bi 3+ and Gd 3+ concentrations for the maximum energy transfer efficiency are determined and persistent NB-UVB light emission with a peak wavelength at 313 nm and an afterglow time of more than 24 h is successfully achieved in the (Y, Gd)3 Ga5 O12 :Bi 3+ phosphor. More importantly, the as-synthesized NB-UVB persistent phosphors are also excitable by the widely available natural sunlight and exhibit exceptional NB-UVB persistent luminescence performance. Benefitting from the visible-blind emission feature, interference-free capability from indoor ambient light and self-sustained optical characteristic, the developed sunlight-excitable NB-UVB persistent phosphors here not only hold great promise for covert optical tagging applications, but also open new opportunities for optical data storage in a bright indoor environment.