Preprint Article Version 1 This version is not peer-reviewed

Super Long Green Persistent Luminescence from X-Ray Excited β-NaYF4: Tb3+

Version 1 : Received: 23 February 2019 / Approved: 26 February 2019 / Online: 26 February 2019 (12:45:04 CET)

How to cite: Hu, Y.; Yang, Y.; Li, X.; Wang, X.; Li, Y.; Li, T.; Zhang, H. Super Long Green Persistent Luminescence from X-Ray Excited β-NaYF4: Tb3+. Preprints 2019, 2019020241 (doi: 10.20944/preprints201902.0241.v1). Hu, Y.; Yang, Y.; Li, X.; Wang, X.; Li, Y.; Li, T.; Zhang, H. Super Long Green Persistent Luminescence from X-Ray Excited β-NaYF4: Tb3+. Preprints 2019, 2019020241 (doi: 10.20944/preprints201902.0241.v1).

Abstract

Here, we have discovered a X-ray excited long afterglow phosphor β-NaYF4: Tb3+. After the irradiation of X-ray, the green emission can persist for more than 240 h. After 36 h, the afterglow intensity arrived at 0.69 mcd•m-2, which can clearly be observed by naked eyes. Even after 84 h, the afterglow emission brightness still reached 0.087 mcd•m-2. Also, combined with the results of thermoluminescence and photoluminescence, the super long afterglow emission of β-NaYF4: Tb3+ can be ascribed to the tunneling model associated with F centers. More importantly, the super long green afterglow emission of β-NaYF4: Tb3+ has been successfully used as in vivo light source to activate g-C3N4 for photodynamic therapy(PDT)and bacteria destruction. Furthermore, super long persistent luminescence of β-NaYF4: Tb3+ could be repeatedly charged by X-ray for many circulations, which indicates that the phosphors have high photo stability under repeated cycles of alternating X-ray irradiation.

Subject Areas

Long afterglow; tunneling model; F centers; PDT

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.