| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
In this study, we have reported the exploration of new host-excited oxide phosphors with f-f emission controlled by metal ions with (n-1)d10ns0 electron configuration. 1)Due to the adjusting the bandgap energy of Pr3+-activated CaZrxTa1-xO2+xN1-x, the f-f emission from Pr3+ was clearly observed under the excitation of near UV lights. 2)Ca(Lu0.5Ta0.5)O3:Pr3+ showed a strong f-f emission due to much lower site-symmetry of Pr3+ by the ordering of Lu3+ and Ta5+ at B-sites. 3)Emission intensity of Ca0.6Sr0.4TiO3:Pr3+ prepared by solution methods were relatively high at the optimum (Ca+Sr+Pr)/Ti ratio and stacking faults in the phosphors created by the deviation of the above cation ratios were caused by the deterioration of the photoluminescence properties.
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