溶胶-凝胶法制备Gd2Zr2O7∶Eu3+红色荧光粉及其发光性能研究
Preparation and Luminescence Properties of Gd2Zr2O7∶Eu3+Red Phosphor via Sol-Gel Method
陈江敏 1赖凤琴 1康立强 1孙晶 1柯乐 1游维雄1
作者信息
- 1. 江西理工大学材料冶金化学学部,江西赣州 341000
- 折叠
摘要
采用溶胶-凝胶法制备了 不同浓度Eu3+离子掺杂的立方结构Gd2Zr2O7红色荧光粉,并研究了其品体结构、形貌、发光特性以及热稳定性、耐水性和内量子效率.结果表明,合成的样品为纯相,Eu3+取代Gd3+的位点,目.Eu3+离了占据了非中心对称的位置.Gd2Zr2O7∶Eu3+荧光粉可以被蓝光很好地激发,Eu3+离子的最佳掺杂浓度为20％(摩尔分数).此掺杂浓度的样品的能隙值为3.88 eV,荧光寿命为1.33 ms,红光色纯度高且发光颜色不受温度影响,具有优良的热稳定性.同时,在被水浸泡72 h后还能保持约原有强度的75％,说明此氧化物荧光粉有较好的耐水性.测试的内量子效率约为70.90％,表明Gd2Zr2O7∶0.2Eu3+是一种高效的荧光粉.
Abstract
Gd2Zr2O7 cubic red phosphors doped with Eu3+ions at different concentrations were prepared by sol-gel method,and their crystal structure,morphology,luminescence properties,thermal stability water resistance and internal quantum efficiency were investigated.The results show that the synthesized samples hare pure phase,Eu3+replaces the site of Gd3+,and Eu3+ion occupies the asymmetric center position.Gd2Zr2O7∶Eu3+phos-phors can be well excited by blue light,with the best doped Eu3+ions concentration of 20％.The energy gap val-ue of the doping concentration of sample is 3.88 eV,the fluorescence lifetime is 1.33 ms,red color of high puri-ty and light color are not affected by temperature.At the same time,after being soaked in water for 72 h,it can maintain about 75％of the original strength,indicating that this oxide phosphor has good resistance to water.The internal quantum efficiency measured is about 70.90％,indicating that Gd2Zr2O7∶0.2Eu3+is a highly effi-cient phosphor.
关键词
溶胶-凝胶法/蓝光激发/热稳定性/耐水性/稀土Key words
sol-gel method/blue light excitation/thermal stability/resistance to water/rare earths引用本文复制引用
基金项目
国家自然科学基金项目(12264021)
江西省自然科学基金项目(20202BAB204009)
出版年
2024
NETL
NSTL
万方数据