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:Photoelectric properties of Sr2MgSi2O7: Eu2+ phosphors produced by co-precipitation method
學年109
學期2
出版(發表)日期2021/03/01
作品名稱Photoelectric properties of Sr2MgSi2O7: Eu2+ phosphors produced by co-precipitation method
作品名稱(其他語言)
著者Su-HuaYang; Hwa-Yu Lee; Po-Chang Tseng; Ming-Hsien Lee
單位
出版者
著錄名稱、卷期、頁數Journal of Luminescence 231, 117787
摘要Eu2+-doped phosphors Sr2MgSi2O7: xEu2+ (x = 1–5 mol%) with blue color are synthesized by the co-precipitation method. The X-ray diffraction patterns of these phosphors indicate a tetragonal crystal structure. The emission peak centered at 486 nm is attributed to the 4 F7→ 4F65D1 transitions of Eu2+ ions with CIE coordinates of (x = 0.176, y = 0.637). We use Sr2MgSi2O7: 4 mol% Eu2+ phosphors to find latent fingerprints (LFPs) with visible patterns on different surfaces under 337 nm UV light. The results indicate that this phosphor may possess the potential to be used for LFP recognition. Three calculated models mimicking the crystal host, Eu2+ ion-doped phosphor, and Eu2+ ion-doped phosphor with oxygen vacancy are built using CASTEP software to perform density functional theory (DFT) calculations. The geometry optimization results of the Eu2+ doping ion reveal that a coordinate covalent bond is formed by the Eu2+ doping ion with its neighboring oxygen atoms. The oxygen vacancy VO causes obvious changes in the electron orbitals of Si and O atoms as well as the 5d empty orbital of Eu2+ ions.
關鍵字Sr2MgSi2O7:Eu2+;Blue phosphor;Density functional theory (DFT);CASTEP;Latent fingerprint (LFP)
語言英文
ISSN1872-7883
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
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出版型式,電子版,紙本
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