The possibility of using a solid solution as a light convertor in white LEDs was studied. A solid solution of Sr<SUB>3</SUB>AlO<SUB>4</SUB>F and Sr<SUB>3</SUB>SiO<SUB>5</SUB> was prepared by solid-state ...
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https://www.riss.kr/link?id=A107679786
2013
-
SCOPUS,SCIE
학술저널
297-303(7쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
The possibility of using a solid solution as a light convertor in white LEDs was studied. A solid solution of Sr<SUB>3</SUB>AlO<SUB>4</SUB>F and Sr<SUB>3</SUB>SiO<SUB>5</SUB> was prepared by solid-state ...
The possibility of using a solid solution as a light convertor in white LEDs was studied. A solid solution of Sr<SUB>3</SUB>AlO<SUB>4</SUB>F and Sr<SUB>3</SUB>SiO<SUB>5</SUB> was prepared by solid-state reaction and was activated with Ce<SUP>3+</SUP>. Phosphor exhibits an asymmetric yellow-orange emission band which is broadened and red-shifted when coactivated with Tb<SUP>3+</SUP>. Decay profile analysis using the Inokuti-Hirayama model revealed that the mechanism involved was electric dipole-quadrupole interaction. The critical distance was calculated from concentration quenching data, multipolar interaction, and exchange interaction. The thermal stability of photoluminescence was investigated by assuming an Arrhenius temperature dependence, and the activation energy for thermal quenching was calculated. When analyzed in combination with an InGaN LED, the phosphor exhibited high color-rendering index and excellent correlated color temperature. These results demonstrate that this solid solution phosphor with its superior properties is highly suitable for use in white LEDs.