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Preparation of SrSi 2 O 2 N 2 : Eu 2+ Phosphor by SrSi Alloy Precursor and Its Long‐lasting Phosphorescence Properties
Author(s) -
Zhang Haoran,
Lei Bingfu,
Qin Jinlan,
Li Jinfang,
Liu Yingliang,
Liu Xiaotang,
Zheng Mingtao,
Xiao Yong,
Dong Hanwu
Publication year - 2013
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12253
Subject(s) - phosphor , phosphorescence , photoluminescence , thermoluminescence , chemistry , afterglow , luminescence , analytical chemistry (journal) , nuclear chemistry , materials science , physics , optoelectronics , fluorescence , optics , chromatography , gamma ray burst , astronomy
Oxynitride long‐lasting phosphorescence ( LLP ) phosphor SrSi 2 O 2 N 2 : Eu 2+ 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− x Eu x Si alloy and the SiO 2 mixture at 1400°C for 3 h. After irradiation under the 280 nm UV light, the afterglow emission of Eu 2+ (4 f 6 5 d 1 → 4 f 7 ) was obviously observed for at least 2 h in the limit of light perception of dark‐adapted human eyes (0.32 mcd/m 2 ). Furthermore, the possible mechanism for the LLP of SrSi 2 O 2 N 2 : Eu 2+ phosphor is also discussed in this article.