| 摘要 |
A luminescent material comprises a strontium aluminate matrix. The material further comprises at least one alkaline earth metal and at least one alkali metal. Furthermore, the material can comprise at least one halogen, preferably chlorine, wherein the molar ratio between the total of halogens and oxygen is between 0.00001 and 0.05, preferably between 0.00005 and 0.01, even more preferably between 0.00025 and 0.005. The material can comprise magnesium, wherein the molar ratio between magnesium and aluminum is between 0.0001 and 0.03, preferably between 0.0003 and 0.02, even more preferably between 0.0005 and 0.015. On the other hand, the material can also comprise Ga, Sc, Y, Bi or any of their combinations. In those cases, the molar ratio between Ga, Sc, Y, Bi or any of their combinations and strontium is between 0.00001 and 0.05, preferably between 0.0001 and 0.02, even more preferably between 0.001 and 0.015. However, the luminescent material can also comprise Pb, Mn or any of their combinations, wherein the molar ratio between Pb, Mn or any of their combinations and strontium is between 0.00001 and 0.15, preferably between 0.0001 and 0.05, even more preferably between 0.001 and 0.02. |
