| Green Light-Emitting Phosphor, Ba2xCaMgSi2O8:Eux |
| Jeong-Seog Kim, Ji-Zhe Piao, Jin-Ho Choi, Chae-Il Cheon, Joo-Suk Park1 |
Department of Digital Display, Hosea University
1Functional Materials Research Center, KIER |
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| ABSTRACT |
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[ $Eu^{2+}$ ]-activated barium magnesium silicate phosphor, $(Ba,Ca)_{3}MgSi_{2}O_{8}:Eu_{x}$, has been known to emit blue-green light. In this study we report the manufacturing processes for producing either pure green or pure blue light-emitting phosphor from the same composition of $Ba_{2-x}Ca_{2}CaMgSi_{2}O_{8}:Eu_{x}$ (0 < x < 1) by controlling heat treatment conditions. Green light emitting phosphor of $Ba_{1.9}CaMgSi_{2}O_{8}:Eu_{0.1}$ can be produced under the sample preparation condition of highly reducing atmosphere of $23%;H_2/77%;N_2$, while blue or blue-green light emitting phosphor under reducing atmosphere of $5~20%;H_2;/;95~80%$ N_2. The green light-emitting phosphors are prepared in two steps: firing at $800~1000^{circ}C$ for $2~5$ h in air then at $1100~1350^{circ}C$ for 2-5 h under reducing atmo |
| Key words:
Green, Blue, Light-emitting phosphor, Broadband excitation, Ultraviolet radiation |
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