教師資料查詢 | 類別: 期刊論文 | 教師: 李明憲 LEE, MING-HSIEN (瀏覽個人網頁)

標題:Luminescent properties and microstructure of SiC doped AlON: Eu2+ phosphors
學年106
學期1
出版(發表)日期2017/11/25
作品名稱Luminescent properties and microstructure of SiC doped AlON: Eu2+ phosphors
作品名稱(其他語言)
著者Liang-Jun Yin*, Chao Cai, Hui Wang, Yu-Jie Zhao, Hao Van Bui, Xian Jian, Hui Tang, Xin Wang, Long-Jiang Deng, Xin Xu, Ming-Hsien Lee*
單位
出版者
著錄名稱、卷期、頁數Journal of Alloys and Compounds, Volume 725, 25 November (2017), Pages 217-226
摘要Superior thermal quenching and degradation of phosphors are required for long lifetime lighting devices, such as light-emitting diodes, which can be realized through composition modification. Here, Al-N bonds in AlON: Eu2+ phosphors are substituted by higher bond order of Si-C. Photoluminescence (PL) results show thermal quenching (at 150 °C) and thermal degradation (after 600 °C treatment in air) are improved by 5% and 8% with a small decrease of PL intensity in 5% SiC doped AlON: Eu2+ phosphor. To explain these observations, first-principles computational study was performed to understand the Si and C configuration in AlON:Eu2+. The calculations reveal that Si and C elements are not randomly distributed in AlON lattice. It was found that Si prefers occupying tetrahedral sites (Td-Si) and the insertion of C in Td-Si is always energetically favorable, which results in the formation of SiC4 and SiNC3 clusters. Thus, the Al-N substitution by Si-C induces a stronger local structure, which accounts for the emission redshift and better thermal stability.
關鍵字Oxynitride;Photoluminescence;Rare-earths;First principles theory
語言英文
ISSN
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別荷蘭
公開徵稿
出版型式,紙本
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