Thermally stable deep-blue Ba1.2Ca0.8SiO4:Ce3+ phosphor for white-light-emitting diode
Thermally stable deep-blue Ba1.2Ca0.8SiO4:Ce3+ phosphor for white-light-emitting diode
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DOI：
10.1016/j.jlumin.2010.02.041
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发表时间：
2010-07
影响因子：
3.6
通讯作者：
Kwangwon Park;Jongsu Kim;P. Kung;S. Kim
中科院分区：
文献类型：
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作者：
Kwangwon Park;Jongsu Kim;P. Kung;S. Kim
研制了一种新型的白光发光二极管用深蓝色荧光粉Ba{sub 1.2}Ca{sub 0.8}SiO{sub 4}：Ce{sup 3+}。该荧光粉在280和325 nm处具有两个吸收带，并在400 nm处具有强烈的深蓝色发射峰。随着Ce/Li浓度的增加，晶格膨胀，并且发射峰蓝移。用晶场效应和组态坐标图解释了这种关联。该磷光体显示出高得多的热猝灭温度（225 ℃）。C）由于弱的电子-声子相互作用。因此，它可以用作敏化剂磷光体来激发其它绿色或红色磷光体，或者用作白光发光二极管的有前途的深蓝色磷光体。
A novel deep-blue phosphor, Ba{sub 1.2}Ca{sub 0.8}SiO{sub 4}:Ce{sup 3+}, has been developed for white-light-emitting diodes. The phosphor exhibits two absorption bands at 280 and 325 nm, and an intense deep-blue emission peaking at 400 nm. With increasing Ce/Li concentrations, the lattice expands, and the emission peak is blueshifted. This correlation is explained in terms of the crystal field effect and the configurational coordinate diagram. This phosphor shows much higher thermal quenching temperature (225 deg. C) due to a weak electron-phonon interaction. Thus, it can be used as a sensitizer phosphor to excite other green or red phosphors, or a promising deep-blue phosphor for white-light-emitting diodes.