Rare-earth-free phosphors based on vanadate compounds and the luminescent mechanism
| Project/Area Number |
24560815
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Yamagata University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
UNUMA Hidero 山形大学, 大学院理工学研究科, 教授 (30273303)
KAWAI Takahiro 山形大学, 大学院理工学研究科, 准教授 (50455903)
KODAMA Nobuhiro 秋田大学, 工学資源学部, 教授 (90282152)
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| Research Collaborator |
KOIDE Takuhiro
HIRO-OKA Masahiro
SUGIYAMA Sho
SATO Akane
SHIDA Minori
WATANABE Keisuke
TAKAHASHI Hide-aki
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
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| Keywords | レア・アースフリー / バナジン酸塩化合物 / 蛍光体 / 発光メカニズム / 第一原理計算 / 3d遷移金属 / 材料設計 / 持続的発展社会 / バナジウム / バナジン酸 |
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| Outline of Final Research Achievements |
Rare-earths are commonly used in inorganic phosphors as the luminescent center as well as the major constituents. However, they are a rare metal and rare-earth-free materials are the key for realization of a sustainably developing society.
In this work, we focused on the vanadate compounds which emit deep-blue to yellow phosphorescence under the UV irradiation. Red phosphorescence was attained with alkali fluorovanadates. The structural investigation revealed a correlation between the luminescent energy and the structural features as compounds with the longer V-O distance in the VO4 clusters tend to have lower energy of the luminescence.
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Report
(4 results)
Research Products
(19 results)
