| ID | 117922 |
| 著者 |
Nakanishi, Akihiro
Tokushima University
Onoe, Tomoya
Tokushima University
Morii, Ryoto
Tokushima University
Kobayashi, Yutaka
NICHIA Corporation
Sakaki, Atsushi
NICHIA Corporation
Shih, Shao-Ju
National Taiwan University of Science and Technology
|
| キーワード | Mn-activated phosphor
Perovskite
Pyrochlore
Octahedral distortion
|
| 資料タイプ |
学術雑誌論文
|
| 抄録 | White light LEDs have a long life and high energy efficiency; however, their application is limited owing to the lack of red components. Herein, we use the solid-state reaction method to fabricate a new Mn-activated perovskite-type La5/3MgTaO6 phosphor that exhibits red emission under UV excitation at 365 nm. A-site deficiency in the perovskite-type structure plays a crucial role in Mn4+ emission in La5/3MgTaO6 because Mn4+—which is located in the non-inversion symmetry site—is activated for such an emission. In addition, the new Mn-activated pyrochlore-type Mg2LaTaO6 phosphor exhibited green emission under UV excitation at 254 nm owing to the oxide ion deficiency of Mg2LaTaO6. Based on the features of the oxide-deficient pyrochlore-type structure, we infer that Mn2+ may be present in the six-coordinate octahedral site with high distortion in pyrochlore-type Mg2LaTaO6.
|
| 掲載誌名 |
Journal of Solid State Chemistry
|
| ISSN | 00224596
1095726X
|
| cat書誌ID | AA00707561
AA11543240
|
| 出版者 | Elsevier
|
| 巻 | 319
|
| 開始ページ | 123780
|
| 発行日 | 2022-12-15
|
| 備考 | 論文本文は2024-12-15以降公開予定
|
| 権利情報 | © 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
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| 出版社版DOI | |
| 出版社版URL | |
| 言語 |
eng
|
| 著者版フラグ |
その他
|
| 部局 |
理工学系
|
