期刊論文
| 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-Hua Yang; 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 v.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 | en |
| ISSN | 1872-7883 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 是 |
| 國別 | NLD |
| 公開徵稿 | |
| 出版型式 | ,電子版,紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/120779 ) |