摘要
采用溶胶-凝胶法合成KGd(WO4)2:Eu3+红色荧光粉。该荧光粉的性质通过X射线粉末衍射、扫描电子显微镜、激发谱、发射谱以及荧光衰减曲线来表征。KGd(WO4)2:Eu3+的激发谱主要由中心大约在270 nm处的宽谱峰以及一系列由Eu3+离子f-f电子能级跃迁导致的锐线峰组成,在近紫外区有一个最强的激发峰在395 nm。正好与紫外InGaN发光二极管(LED)芯片发射波长匹配。在395 nm激发下,可以观察到最佳掺杂量为40%(原子分数)的KGd(WO4)2:Eu3+在614 nm处产生强烈的红光。发光特性表明,KGd(WO4)2:Eu3+荧光粉可能潜在成为近紫外发光二极管(LEDs)用的红色荧光粉。
KGd（WO4）2： Eu3＋ red phosphors were prepared by sol-gel method.The properties of the resulting phosphors were characterized by X-ray diffraction,scanning electron microscopy,excitation spectra,emission spectra and decay curve.The excitation spectra of KGd（WO4）2： Eu3＋ phosphors were mainly attributed to WO2-4 and Eu-O charge-transfer band at about 270 nm,and some sharp lines were also attributed to Eu3＋ f-f transitions in near-UV regions with the strongest peaks at 395 nm.Under the 395 nm excitation,the intense red emission peak at 614 nm were observed for 40%（atom fraction） KGd（WO4）2： Eu3＋ phosphors as the optimum dopant concentration.The strongest line（395 nm） in excitation spectra of these phosphors matched well with the output wavelength of UV InGaN-based light-emitting diodes（LEDs） chip.The luminescent properties suggested that KGd（WO4）2： Eu3＋ phosphor might be regarded as a potential red phosphor candidate for near-UV LEDs.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2011年第2期178-184,共7页
Journal of the Chinese Society of Rare Earths
基金
江西省自然科学基金(2010GZW0022)
江西省教育厅项目(GJJ10472)资助
关键词
发光材料
溶胶-凝胶法
红色荧光粉
钨酸盐
稀土
luminescent materials
sol-gel method
red phosphors
tungstate
rare earths
作者简介
游航英（1987-），女，硕士研究生；研究方向：稀土发光材料
通讯联系人（E—mail：jsliao1209@126．com）
