摘要
LuAG∶Ce^(3+)是一种高效稳定的商业化绿色荧光转换材料。我们采用真空烧结方法制备了一系列掺杂Ga^(3+)/Sc^(3+)的LuAG∶Ce^(3+)透明陶瓷样品,并研究了掺杂离子及掺杂浓度对其晶体结构、荧光性能及热稳定性能的影响。在450 nm蓝光激发下,Ga^(3+)和Sc^(3+)的掺杂均使LuAG∶Ce^(3+)的发射谱发生蓝移。其中,Ga^(3+)离子具有更好的蓝移效果,在掺杂浓度从0%提升至20%时,发射光谱从536 nm蓝移至506 nm。与此同时,两种离子掺杂均降低了绿光陶瓷的热稳定性能。但通过变温发射谱及量子产率表征发现,Ga^(3+)离子对陶瓷热性能的影响比Sc^(3+)离子的小。将两个系列的陶瓷样品封装在3 W的蓝光LED芯片上,获得了具有不同光色的绿光光源。其中,Ga^(3+)系列陶瓷展现出了更优异的光色可调性,并且维持着更高的光效。综上,我们认为Ga^(3+)离子掺杂的Lu-AG∶Ce^(3+)陶瓷是一种具有较大潜力的绿色荧光转换材料。
LuAG∶Ce^(3+)is an efficient and stable commercial green phosphor-converted material.Two series of Lu3Al5-xMxO12∶Ce^(3+)transparent ceramics(TCs)doped with Ga^(3+)/Sc^(3+)ions were fabricated by vacuum sintering.The effects of doping ions and their concentration on crystal structure,fluorescence properties,and thermal stability were investigated.Both Ga^(3+)and Sc^(3+)doped LuAG∶Ce^(3+)samples exhibit a blue-shift under 450 nm blue light excitation.Significantly,Ga^(3+)doped samples have more effective spectral modulation,and the emission spectrum shifts from 536 nm to 506 nm when Ga^(3+)concentration increases from 0%to 20%.Meanwhile,it is found from temperature-dependence spectrum and quantum yield characterization that Ga^(3+)doped ions have less impact on thermal stability of LuAG∶Ce^(3+)ceramics.By encapsulating the ceramic samples on 3 W blue LED chips,green light sources with various spectra were obtained.Among them,Ga^(3+)doped LuAG∶Ce^(3+)samples show better color tunability and maintain higher light efficiency.In summary,Ga^(3+)doped LuAG∶Ce^(3+)ceramic is a promising green phosphor-converted material.
作者
周泽华
黄集权
陈剑
邓种华
郭旺
ZHOU Ze-hua;HUANG Ji-quan;CHEN Jian;DENG Zhong-hua;GUO Wang(School of Chemistry,Fuzhou University,Fuzhou 350002,China;Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou 350108,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2022年第12期1928-1937,共10页
Chinese Journal of Luminescence
基金
闽都创新实验室自主部署项目(2021ZZ113)
中国科学院战略重点研究项目(XDA22010301)资助。
关键词
LUAG
透明陶瓷
绿色荧光转换材料
变温发射谱
LuAG
transparent ceramics
green color converter
temperature-dependence spectrum
