| 標題：Europium location in the AlN: Eu green phosphor prepared by a gas-reduction-nitridation route |
|---|
| 學年 | 100 |
|---|
| 學期 | 1 |
|---|
| 出版（發表）日期 | 2012/01/01 |
|---|
| 作品名稱 | Europium location in the AlN: Eu green phosphor prepared by a gas-reduction-nitridation route |
|---|
| 作品名稱（其他語言） | |
|---|
| 著者 | Yin, Liang-Jun; Zhu, Qiang-Qiang; Yu, Wei; Hao, Lu-Yuan; Xu, Xin; Hu, Feng-Chun; Lee, Ming-Hsien |
|---|
| 單位 | 淡江大學物理學系 |
|---|
| 出版者 | College Park: American Institute of Physics |
|---|
| 著錄名稱、卷期、頁數 | Journal of Applied Physics 111(5), 053534(7pages) |
|---|
| 摘要 | Eu doped aluminum nitride phosphors were successfully synthesized by a novel gas-reduction-nitridation route with a reaction temperature of 1400 °C and a soaking time of 3 h. The obtained AlN:Eu phosphors were analyzed to elucidate the location of the Eu luminescent center. High-resolution transmission electron microscopy and transmission electron microscopy-energy dispersive spectra proved that Eu was located in the crystal lattice of AlN, then EXAFS revealed that Eu occupied a highly distorted Al site coordinated by four nitrogen at about 2.30–2.40 Å, and the second nearest neighbors of Eu were 12 Al. This could be confirmed by the first-principles calculations based on the obtained local structure around the Eu luminescence center, where the theoretical absorption spectrum was similar to the experimental excitation spectrum. X-ray appearance near edge structure showed that Eu existed in terms of both Eu3+ and Eu2+ ions, which could be related to the limited location space of Eu. High temperature treatment could significantly increase the amount of Eu2+ by the expansion of the crystal lattice, leading to an increased green luminescence of the obtained AlN:Eu phosphors. |
|---|
| 關鍵字 | |
|---|
| 語言 | 英文 |
|---|
| ISSN | 0021-8979; 1089-7550 |
|---|
| 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 | 美國 |
|---|
| 公開徵稿 | |
|---|
| 出版型式 | 紙本 |
|---|
| 相關連結 | |
|---|
|
Google+ 推薦功能，讓全世界都能看到您的推薦！
