Preparation of SrSi2O2N2:Eu2+ Phosphor by SrSi Alloy Precursor and Its Long‐lasting Phosphorescence Properties. Issue 6 (15th March 2013)

• Record Type: Journal Article
• Authors: Zhang, Haoran; Lei, Bingfu; Qin, Jinlan; Li, Jinfang; Liu, Yingliang; Liu, Xiaotang; Zheng, Mingtao; Xiao, Yong; Dong, Hanwu; Hintzen, H.
• Is Part Of: Journal of the American Ceramic Society. Volume 96:Issue 6(2013)
• Page Start: 1810
• Page End: 1814
• Publication Date: 2013-03-15
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.12253
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" xml:lang="en" id="jace12253-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Oxynitride long‐lasting phosphorescence (LLP) phosphor SrSi₂O₂N₂:Eu²⁺ was prepared by a new method using SrSi alloy as a precursor. Its properties were systematically investigated utilizing XRD, photoluminescence, excited‐state decay curve, long‐lasting phosphorescence, and thermoluminescence spectrum. This phosphor was found to be well‐crystallized by calcinations of the Sr_{1−<italic>x</italic>}Eu_{<italic>x</italic>}Si alloy and the SiO₂ mixture at 1400°C for 3 h. After irradiation under the 280 nm UV light, the afterglow emission of Eu²⁺ (4<italic>f</italic>⁶5<italic>d</italic>¹ → 4<italic>f</italic>⁷) was obviously observed for at least 2 h in the limit of light perception of dark‐adapted human eyes (0.32 mcd/m²). Furthermore, the possible mechanism for the LLP of SrSi₂O₂N₂:Eu²⁺ phosphor is also discussed in this article.</p> </abstract>