| Autor: |
Kohta Nambu, Hitoshi Hayasaka, Takahisa Yamamoto, Hidehiro Yoshida |
| Zdroj: |
Applied Physics Express; 7/1/2019, Vol. 12 Issue 7, p1-1, 1p |
| Abstrakt: |
Photoluminescence of Y2O3 is commonly activated by the doping of rare-earth elements such as Eu. In the present study, we produced undoped and 1 mol% Si4+-doped, polycrystalline Y2O3 phosphors emitting blue-light by employing flash-sintering process. The luminescence was observed only in the flash-sintered specimens, but was not observed in the conventionally-sintered Y2O3 bodies. In particular, the Si4+-doped Y2O3 body prepared by the flash-sintering process using AC field exhibited remarkable photoluminescence under a UV light. The formation of excess point defects such as oxygen interstitials induced by the flash-sintering and Si4+-doping were likely to be attributed to the blue luminescence. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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