激光与光电子学进展, 2011, 48 (10): 101601, 网络出版: 2011-08-29
白光LED用Ce,Cr共掺Y3Al5O12单晶发射光谱和能量转移研究
Emission Spectrum and Energy Transfer in Cr and Ce Co-Doped Y3Al5O12 Single Crystal for White LED
摘要
监测共掺Ce，Cr的钇铝石榴石单晶(YAG，Y3Al5O12)Cr3+离子发射的红光波段，其激发光谱在波长460 nm处有一个强烈的激发宽带，可以证实存在能量传递。比较Cr3+浓度相同的共掺Ce、Cr两种元素的晶体和单掺Cr元素的晶体，发现Cr3+的发射光谱在红光部分，前者的发射强度剧烈增加，比后者多出一个数量级。研究发现红光部分发射增强的原因是两种掺杂离子之间发生Ce3+(2E)到Cr3+（4T）的能量转移。
Abstract
Excitation spectra collected at Cr3+ red emission show an intense excitation broad band at 460 nm confirming there is energy transfer, which is responsible for one order of magnitude increase in the intensity of the red emission compared to Y3Al5O12 (Ce,CrYAG) single crystal doped with Cr alone. Ce/Cr co-doped Y3Al5O12 exhibits enriched emission spectrum in the red region due to a nonradiative energy transfer from the Ce3+(2E) level to Cr3+(4T) level.
王鑫, 赵广军, 陈建玉. 白光LED用Ce,Cr共掺Y3Al5O12单晶发射光谱和能量转移研究[J]. 激光与光电子学进展, 2011, 48(10): 101601. Wang Xin, Zhao Guangjun, Chen Jianyu. Emission Spectrum and Energy Transfer in Cr and Ce Co-Doped Y3Al5O12 Single Crystal for White LED[J]. Laser & Optoelectronics Progress, 2011, 48(10): 101601.
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