【作者】 张金苏； 陈宝玖； 仲海洋； 孙佳石； 程丽红； 李香萍；

【Author】 Jinsu Zhang~1 Baojiu Chen~(*,1) Haiyang Zhong~1 Jiashi Sun~1 Lihong Cheng~1 Xiangping Li~1 (1 Department of Physics,Dalian Maritime University,Dalian,Liaoning,116026,China)

【机构】 大连海事大学物理系；

【摘要】 采用固相法合成了Sm³⁺和Bi³⁺共掺杂的LaMgB₅O₁₀红色荧光粉,在紫外或蓝色发光二极管激发下样品的红色发光强度随着Bi₂O₃掺杂剂的掺入而增强。为了研究Sm³⁺的红色荧光增强机制,利用扫描电镜和X射线衍射对样品的形貌和结构进行了分析,分析结果表明,掺入Bi₂O₃后,样品的结晶度更好。通过样品的激发光谱和发射光谱的测量,发现了在监测共掺杂样品中Sm³⁺的595 nm红光发射时,观测到Bi³⁺的激发峰,同时,观测到Bi³⁺的掺杂使200-400 nm范围内Sm³⁺的激发峰减弱,这是由于Sm³⁺和Bi³⁺之间存在着相互能量传递,在400-500 nm范围内的光激发,双掺杂样品的红色荧光较Sm³⁺单掺杂样品的荧光增强约为10%,分析指出了荧光增强是由于Bi³⁺的掺杂使得Sm³⁺的吸收增强。更多还原

【Abstract】 Red phosphors of Sm³⁺ and Bi³⁺ codoped LaMgB₅O₁₀ have been synthesized by solid-state reaction.The red emitting intensities are enhanced with Bi₂O₃ addition based on the UV/blue LEDs excitation.To study the mechanism of luminescence enhancement of Sm³⁺ ions,the morphology and crystal structures are analyzed using the field emission scanning electron microscopy images and X-ray diffraction. It suggests that the crystallization is better in the codoped samples than the singly doped sample.The photoluminescence excitation and photoluminescence spectra are measured.It is found that the excitation spectrum of Sm³⁺ and Bi³⁺ codoped LaMgB₅O₁₀ contains both Sm³⁺ and Bi³⁺ excited peaks,at the same time,the intensities of excited peaks of Sm³⁺ in the range of 200-400 run decrease,demonstrating occurrence of energy transfer between Bi³⁺ and Sm³⁺.Moreover,the enhancement of red emitting lines is about 10% higher for the codoped samples than the singly doped ones.The enhancement of the photoluminescence is due to the enhanced absorption strength of the Sm³⁺ ions with Bi³⁺ addition.更多还原