Sr2LuNbO6∶Mn4+深红荧光粉的光学性质:晶体场劈裂和多模振动耦合
Optical properties of Sr2LuNbO6∶Mn4+deep-red phosphor.crystal-field splitting and multimode vibrational coupling
周广涵 1张德保 1唐飞 2郑昌成 3宁吉强 1徐士杰1
作者信息
- 1. Department of Optical Science and Engineering,School of Information Science and Technology,Fudan University,Shanghai 200438,China
- 2. School of Physics and Electronic Engineering,Jiangsu Normal University,Xuzhou 221116,China
- 3. Division of Natural and Applied Sciences,Duke Kunshan University,Kunshan 215316,China
- 折叠
摘要
本研究利用光致发光(PL)、光致发光激发(PLE)、时间分辨PL和拉曼光谱技术等,详细研究了通过熔盐固相法合成的Sr2LuNbO6∶Mn4+深红荧光粉的光学性质.在室温下,样品的PL光谱呈现出阶梯状谱形.然而,在低温下,测量的PL光谱由两组多模振动电子发光谱线组成.基于变温PL光谱和拉曼光谱,我们识别出双零声子谱线以及两组恒定能量间隔为～2.8 meV的多模声子伴线.这项研究首次发现Mn4+离子的2Eg激发态能级在氧化物八面体晶格中具有～2.8meV能量差的劈裂,并证实多种振动模式深度参与Mn4+离子的振动电子发光.
Abstract
In this study,the optical properties of Sr2LuNbO6∶Mn4+deep-red phosphor synthesized with a mol-ten salt solid-phase method were investigated in detail by using photoluminescence(PL),PL excitation(PLE),time-resolved PL,and Raman spectroscopic techniques.At room temperature,the PL spectra of the phosphor sample show a stepped shape.At cryogenic temperatures,however,the measured PL spectra are featured by two sets of multi-mode vibronic luminescence lines.Based on the variable-tempera-ture PL spectra and Raman spectra,the dual zero-phonon lines and the two sets of multimode vibronic lines with a constant energy separation of～2.8 meV are identified.This study leads to the unprecedented determination of the split-ting energy of the 2Eg excited-state and the confirmation of multiple vibrational modes involved within the vibronic lu-minescence.
关键词
oxide phosphor/deep red luminescence/Mn4+ion/excited-state splitting/impurity-lattice couplingKey words
oxide phosphor/deep red luminescence/Mn4+ion/excited-state splitting/impurity-lattice coupling引用本文复制引用
基金项目
国家自然科学基金(12074324)
国家自然科学基金(11374247)
Science,Technology,and Innovation Commission of Shenzhen Municipality(JCJY20180508163404043)
Science,Technology,and Innovation Commission of Shenzhen Municipality(JCYJ20170818141709893)
出版年
2024
NETL
NSTL
万方数据