Electrical stimulation for brighter persistent luminescence

Xilin Ma; Yuhua Wang; Takatoshi Seto

doi:10.1038/s41377-024-01507-0

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Electrical stimulation for brighter persistent luminescence

Original Articles

- Electrical stimulation for brighter persistent luminescence
- Light: Science & Applications Vol. 13, Issue 8, Pages: 1590-1601(2024)
- Affiliations：
  
  Key Laboratory for Special Function Materials and Structural Design of the Ministry of Education, National & Local Joint Engineering Laboratory for Optical Conversion Materials and Technology of National Development and Reform Commission, Department of Materials Science, School of Materials and Energy, Lanzhou University, No. 222, South Tianshui Road, Lanzhou, Gansu 730000, China
- Author bio：
  
  Yuhua Wang (wyh@lzu.edu.cn)
  Takatoshi Seto (seto@lzu.edu.cn)
- Funds：
- DOI：10.1038/s41377-024-01507-0
  CLC：
- Published：31 August 2024，
  
  Published Online：15 July 2024，
  
  Received：04 February 2024，
  
  Revised：04 June 2024，
  
  Accepted：13 June 2024
- Accepted：
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Ma, X. L., Wang, Y. H. & Seto, T. Electrical stimulation for brighter persistent luminescence. Light: Science & Applications, 13, 1590-1601 (2024).
DOI：

Ma, X. L., Wang, Y. H. & Seto, T. Electrical stimulation for brighter persistent luminescence. Light: Science & Applications, 13, 1590-1601 (2024). DOI： 10.1038/s41377-024-01507-0.

摘要

Abstract

An immature understanding of the mechanisms of persistent luminescence (PersL) has hindered the development of new persistent luminescent materials (PersLMs) with increased brightness. In this regard

in-situ direct current (DC) electric field measurements were conducted on a layered structure composed of the SrAl

:Eu

phosphor

and an electrode. In this study

the photoluminescence (PL) and afterglow properties were investigated with respect to voltage by analyzing the current signal and thermoluminescence (TL) spectroscopy. The intensity of PersL increased due to a novel phenomenon known as "external electric field stimulated enhancement of initial brightness of afterglow". This dynamic process was illustrated via the use of a rate equation approach

where the electrons trapped by the ultra-shallow trap at 0.022 eV could be transferred through the conduction band during long afterglow. The afterglow intensity could reach 0.538 cd m

−2

at a 6 V electric voltage. The design of an electric field stimulation technique enables the enhancement of the intensity of PersLMs and provides a new perspective for exploring the fundamental mechanics of certain established PersLMs.

关键词

Keywords

references

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