新型红色荧光粉Sr3CaNb2O9∶Sm3+,Eu3+的发光特性和能量传递分析
Study on Luminescence Properties and Energy Transfer of Novel Red Phosphors Sr3CaNb2O9∶Sm3+,Eu3+
洪俊煌 1孟宪国 1许英朝 1肖泽宇 1刘月 1林振鹏1
作者信息
- 1. 厦门理工学院光电与通信工程学院,福建 厦门 361024;福建省光电技术与器件重点实验室,福建 厦门 361024
- 折叠
摘要
利用高温固相反应法制备一系列单基质荧光粉Sr3CaNb2O9∶x Sm3+,y Eu3+(x=0.04～0.09,y= 0.03～0.15),并对样品的物相形貌、发光性能、能量传递机制和CIE色坐标进行分析.研究表明,Sr3CaNb2O9∶x Sm3+荧光粉在激发波长为407 nm时的浓度淬灭点为x=0.07.在Sr3CaNb2O9∶0.07Sm3+,y Eu3+荧光粉中,随着Eu3+掺杂浓度的增加,Sm3+的发光强度降低而Eu3+发光强度却先增加后降低,Eu3+的浓度淬灭点为y=0.09.Sm3+→Eu3+的能量传递以电偶极-电偶极相互作用为主,能量传递效率达到76.6%.色坐标图表明Eu3+离子的加入可使色坐标从橙红色区域向纯红色区域移动.此外,样品还具有较高的色纯度和较低的色温.结果表明,Sr3CaNb2O9∶Sm3+,Eu3+荧光粉有望成为白光LED发出红光物质的候选材料.
Abstract
A series of single-matrix phosphors Sr3CaNb2O9:xSm3+,yEu3+(x=0.04～0.09,y=0.03～0.15)were prepared by means of high-temperature solid-phase reaction,and the samples investigated in terms of their physical morphology,luminescence properties,energy transfer mechanism and CIE color coordinates.The finding results are as the following:the concentration quenching point of Sr3CaNb2O9:xSm3+ phosphor at an excitation wavelength of 407 nm is x=0.07;in Sr3CaNb2O9:0.07Sm3+,yEu3+ phosphor,the luminescence intensity of Sm3+ decreases while the luminescence intensity of Eu3+ increases and then decreases with the increase of the Eu3+ doping concentration,and the concentration quenching point of Eu3+ is y=0.09;the energy transfer of Sm3+→Eu3+ is dominated by dipole-dipole interactions with an energy transfer efficiency of 76.6％;and the color coordinate plot shows that the addition of Eu3+ ions shifts the color coordinate from the orange-red region to the pure red region.In addition,the samples have high color purity and low color temperature.The results show that Sr3CaNb2O9:Sm3+,Eu3+ phosphor is expected to be a candidate material for red light emitting substances in white LEDs.
关键词
Sr3CaNb2O9∶Sm3+,Eu3+/稀土掺杂/发光特性/能量传递Key words
Sr3CaNb2O9:Sm3+,Eu3+/rare earth doping/luminescence properties/energy transfer引用本文复制引用
基金项目
福建省自然科学基金面上项目(2019J01876)
厦门市科技计划重大项目(3502ZCQ20191002)
厦门理工学院科研攀登计划(XPDKT20009)
出版年
2024
NETL
NSTL
万方数据