2005年1月
Luminescence properties of delafossite-type CuYO2 doped with calcium, oxygen or rare earth Tb
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS
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- 巻
- 44
- 号
- 1B
- 開始ページ
- 765
- 終了ページ
- 768
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1143/JJAP.44.765
- 出版者・発行元
- JAPAN SOC APPLIED PHYSICS
Delafossite-type CuYO2 and CuY1-xCaxO2 (x <= 0.05) samples exhibited a green-PL-emission band due to the Cu+ interconfiguration transition from 3d(9)4s(1) to 3d(10) at room temperature. With increasing Ca concentration, the Cu+ emission shifted slightly to the. shorter-wavelength side with a slightly weaker emission intensity. This slight change in Cu+ emission property is considered to be caused by the increase in hole concentration within the Cu+ layer arising from the increase in Ca concentration. On the other hand, oxygen-annealed CuYO2 samples exhibited no emissions. The increase in nonradiative relaxation processes in the oxygen-annealed CuYO2 samples is possibly related to structural changes such as orthorhombic distortion during the oxygen annealing. In the photoluminescence of delafossite-type CuY1-yTbyO2 (y = 0.05) at room temperature, no Cu+ emission band was observed, but sharp emission lines were observed. All the emission lines were assigned to the f-f transitions of Tb3+ (D-5(4)-> F-7(J), J = 3-6).
- リンク情報
- ID情報
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- DOI : 10.1143/JJAP.44.765
- ISSN : 0021-4922
- Web of Science ID : WOS:000232787000069