| Budget Amount *help |
¥24,050,000 (Direct Cost: ¥18,500,000、Indirect Cost: ¥5,550,000)
Fiscal Year 2019: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2018: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2017: ¥11,180,000 (Direct Cost: ¥8,600,000、Indirect Cost: ¥2,580,000)
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| Outline of Final Research Achievements |
We examined development of silicon-based, durable light emitting particles that have unique trenched structures. Trenched silicon microparticles were obtained by chemical etching with a mixture of acids. They showed a visible orange-red emission from the trenched particles under excitation by ultra-violet (UV) light. We have revealed that oxidation under reduced pressure increased durability of the visible light emission from microparticles. Oxidation is a main cause that shortens the durability of light emission. But this result showed that oxidation would be a practical method to increase the durability if we use oxidation in a reasonable way. In addition, we have also examined etching process. Mixing of microparticles and the acid solution during etching was not preferable to proceed etching. Enough concentration of intermediate species around the microparticles is a key to produce trenched silicon microparticles.
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