| 白光LED用SrAl2Si2O8∶Eu2+荧光粉的制备与发光性能研究 | |
| Preparation and Photoluminescence Properties of SrAl2Si2O8∶Eu2+ Phosphors for White LED | |
| 摘要: 采用高温固相法制备了SrAl2Si2O8∶Eu2+系列荧光粉，研究了灼烧温度以及助熔剂硼酸浓度和激活剂Eu2+离子浓度对发光性能的影响，研究了SrAl2Si2O8的微结构。结果表明，以3.0wt% H3BO3为助熔剂，在1 250 ℃灼烧3 h可制备发光性能优良的SrAl2Si2O8∶Eu2+荧光粉，Eu2+离子的最佳掺杂浓度为2.5mol%，Eu2+离子浓度过大时的浓度猝灭是由电偶极-电四极之间的相互作用引起的。SrAl2Si2O8∶Eu2+的激发和发射光谱均为宽带谱，在280~380 nm光的激发下，可发射峰值波长位于429 nm的蓝色光。 | |
| 关键词: SrAl2Si2O8∶Eu2+ 白光LED 荧光粉 发光 | |
| 基金项目: | |
| Abstract: The SrAl2Si2O8∶Eu2+ blue phosphor was synthesized by the solid-state reaction method. The effect of the synthesizing temperature and the concentration of activator Eu2+ and flux H3BO3 on the spectrum characteristics and structure of the sample was investigated，as well as the microstructure of SrAl2Si2O8. The results show that the sample SrAl2Si2O8∶Eu2+ with a concentration of 3.0wt% H3BO3 and 2.5mol% Eu2+ which was ignited at 1 250 ℃ for 3 h is of the best luminescence capability. The concentration quenching mechanism is the d-q(dipole-quadrupole) interaction. SrAl2Si2O8∶Eu2+ excited by 280~380 nm showed a characteristic wide band with the peak at about 429 nm. | |
| Keywords: SrAl2Si2O8∶Eu2+ white LED phosphors luminescence | |
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| 陈立松,柏朝晖,李金伟,王 珮,王鹏飞,钟 颖,单冬冬.白光LED用SrAl2Si2O8∶Eu2+荧光粉的制备与发光性能研究[J].无机化学学报,2010,26(8):1409-1414. | |
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