2007 Fiscal Year Final Research Report Summary
Development of Conductive Delafossite-type Oxide Phosphor Co-doped with Rare-earth and Acceptor Cations
| Project/Area Number |
18560006
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied materials science/Crystal engineering
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| Research Institution | Niigata University |
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Principal Investigator |
TSUBOI Nozomu Niigata University, Institute of Science and Technology, Associate Professor (70217371)
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| Co-Investigator(Kenkyū-buntansha) |
KOBAYASHI Satoshi Niigata University, Institute of Science and Technology, Professor (30018626)
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| Project Period (FY) |
2006 – 2007
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| Keywords | delafossite / CuYO_2 / CuLaO_2 / phosphor / transparent conductive oxide / rare earth / co-doping / conductive oxide phosphor |
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| Research Abstract |
Delafossite-type oxides of CuR_xY_(1-x) O_2 and CuR_xLa_(1-x) O_2 (R: Eu, Tb, Tm) samples were prepared by the conventional solid state reactions using binary oxides as sources. Taking account of the rare-earth ionic radii, the lattice-constant dependence on the concentration of the rare-earth cation implied doping with the R^(3+) cation on the Y^(3+) or La^(3+) site. A broad emission band due to the Cu^+ interconfiguration transition from 3d^94s to 3d^(10) was observed in CuYO_2 and CuLaO_2, while noticeable sharp emission lines due to the f-f transitions of R^(3+) were observed in respective CuR_xY_(1-x) O_2 and CuR_xLa_(1-x) O_2, indicating successful control of luminescence property of CuYO_2 and CuLaO_2 by doping with R. P-type conductivity of CuCa_yY_(1-y) O_2 increased with increasing Ca concentration, but those of CuCa_yLa_(1-y) O_2 and CuSr_yLa_(1-y) O_2 did not. The increase of the p-type conductivity in CuCa_yY_(1-y) O_2 is considered to be caused by substitution of Ca^(2+)
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acceptor cation for the Y^(3+) site. CuR_xCa_yY_(1-x-y) O_2 samples co-doped with R and Ca, as well as the CuR_xY_(1-x) O_2 and CuCa_yY_(1-y) O_2 samples, exhibited noticeable sharp emission lines due to the f-f transitions of R^(3+) and good p-type conductivity due to Ca^(2+) acceptor. This fact demonstrates controllability of luminescence and conductive properties of CuYO_2 by co-doping with R and Ca. Delafossite-type CuYO_2 and CuR_xY_(1-x) O_2(R: Eu, Tb)films were prepared by solution method using metal nitrates as sources. The lattice-parameter dependence on R concentration implies substitution of R^(3+) for Y^(3+) site. A green emission band due to the Cu^+ interconfiguration transition was observed in CuYO_2 films, while noticeable sharp emission lines due to the f-f transitions of Tb^(3+) and Eu^(3+) were observed in respective CuTb_xY_(1-x) O_2 and CuEu_xY_(1-x) O_2 films. These results for the films correspond well to the data for the CuR_xY_(1-x) O_2 bulk samples prepared by the conventional solid state reactions, indicating successful preparation of CuYO_2 and CuR_xY_(1-x) O_2 films via the solution method. Less
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Research Products
(15 results)
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[Presentation] Preparation and Characterization of Tb- and Eu-doped CuYO_2 Delafossite-type Oxide Films by Solution Method2008
Author(s)
Kenichi, Tosaka, Nozomu, Tsuboi, Satoshi, Kobayashi, Keizo, Katoh, Futao, Kaneko
Organizer
The 2008 Annual Meeting of the Japan Society of Applied Physics
Place of Presentation
Funahashi, Japan
Year and Date
2008-03-28
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Preparation of CuYO_2 Delafossite-type Oxide Films by Dip-coating Method2007
Author(s)
Kenichi, Tosaka, Nozomu, Tsuboi, Satoshi, Kobayashi, Keizo, Katoh, Futao, Kaneko
Organizer
The 2007 International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies
Place of Presentation
Nagano, Japan
Year and Date
2007-06-22
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Preparation and luminescence property of rare-earth(Eu, Tb)doped CuLaO_22006
Author(s)
Yoshihiro, Yamakawa, Nozomu, Tsuboi, Satoshi, Kobayashi, Keizo Katoh, Futao, Kaneko
Organizer
The 2006 Annual Meeting of the Hokuriku-Shinetsu Chapter of the Japan Society of Applied Physics
Place of Presentation
Niigata, Japan
Year and Date
2006-11-25
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Preparation and characterization of rare-earth-doped CuLaO_2 delafossite-type oxide2006
Author(s)
Yoshihiro, Yamakawa, Nozomu, Tsuboi, Satoshi, Kobayashi, Keizo, Katoh, Futao, Kaneko
Organizer
The 2006 Annual Meeting of the Professional Group of Ternary and Multinary Compounds of the Japan Society of Applied Physics
Place of Presentation
Sendai, Japan
Year and Date
2006-11-17
Description
「研究成果報告書概要(欧文)」より
