Sm3+离子掺杂BaZrO3粉体的制备及其发光性能研究
Preparation and spectral properties of BaZrO3:Sm3+phosphors
陈澍 1史忠祥 2王晶 2贾宇盟 2杨雨佳3
作者信息
- 1. 瓦房店轴承集团有限责任公司工程中心,辽宁大连 116000
- 2. 大连交通大学材料科学与工程学院,辽宁大连 116028
- 3. 中车唐山机车车辆有限公司,河北唐山 064099
- 折叠
摘要
迄今为止,蓝光激发的Y AG:Ce3黄色荧光粉仍在白光发光二极管(light emitting diode,LED)市场上占据很大份额,但这类白光存在红光成分缺失的固有缺陷,因此得到的白光显色指数较低,色温偏高,而依靠稀土离子实现红、绿、蓝三基色调和的白光则能很好地克服这一弊端.本文应用传统水热反应一步合成出一系列与基质同相的Sm3+离子掺杂BaZrOa荧光粉.其X射线衍射(X-ray diffraction,XRD)、扫描电子显微镜(scanning electron microscopy,SEM)、粒度分布、傅里叶变换红外光谱(Fourier transform infrared spectrum,FT-IR)和荧光光谱(fluorescence spec-trum,FL)等测试结果表明,所得产物均呈立方钙钛矿结构,且当更多异价Sm3+取代Zr4+离子后,会引起晶粒尺寸、晶胞常数以及晶格应变等参数的增大.此外,随着Sm3+离子浓度的升高,红外谱峰逐渐蓝移直至Sm3+=3.0mol％时达最大值,这与通过分子振动频率计算出的结果吻合.最后,基于光谱中宽发射带与Sm3+特征发射峰的相对强度关系证实,在BaZrO3晶体中存在缺陷发光,且当引入Sm34离子后可实现BaZrO3与Sm3+间的能量传递.
Abstract
So far,YAG:Ce3+yellow phosphor excited by blue light still holds a large share in the white light emitting diode(LED)market.but it has inherent defects of red light components'deficiency,so the obtained white light has a low color-rendering index and a high color temperature.However,the white light that relies on rare earth ions to achieve the harmony of red,green,and blue primary colors can overcome this drawback effectively.This paper applied traditional hydrothermal reactions to synthesize red phosphor,a series of Sm3+ion doped BaZrO3 in the same phase as the substrate in one step and whose test results of X-ray diffraction(XRD),scanning electron microscopy(SEM),particle size distribution,Fourier transform infrared spectrum(FT-IR)and fluorescence spectrometer(FL)showed that the obtained products all exhibit a cubic perovskite structure and furthermore,after more heterovalent Sm3+replaced Zr4+ion,parameters,such as grain size,crystal cell parameters,and the lattice strain,were increased.In addition,as the concentration of Sm3+ions increased,the infrared spectrum peak gradually shifted blue until reaching its maximum value at Sm3+=3.0 mol％,which was consistent with the result calculated by molecular vibrational frequency.Finally,the relationship based on the relative intensity between the broad emission band in the spectrum and the characteristic luminescence peak of Sm3+verified that luminescence from defects existed in BaZrO3 crystal,and after Sm3+ions were introduced and the energy transmission between BaZrO3 and Sm3+could be realized.
关键词
BaZrO3/Sm3+/蓝移/缺陷发光/能量传递Key words
BaZrO3/Sm3+/blue shift/defect luminescence/energy transfer引用本文复制引用
基金项目
辽宁省教育厅基本科研项目(JYTMS20230040)
出版年
2024
NETL
NSTL
万方数据