期刊論文
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 | en |
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 | USA |
公開徵稿 | |
出版型式 | 紙本 |
相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/80610 ) |