Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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Outline of Final Research Achievements |
New red or orange sulfide phosphors are studied. These phosphors including lanthanum, yttrium, and silicon were synthesized by solid state reaction under vacuum or sulfur vapor atmosphere. Optical centers are cerium ions, which are known as blue or yellow materials. Internal quantum efficiency was as high as 62%. Luminescence wavelength is controlled by the concentration of cerium. Optical absorption is realized from ultraviolet to green wavelength region.
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