Luminescence properties of Y5Si3O12N:Ce3+/Tb3+ co-doped oxynitride phosphors

2nd International Symposium on Application of Materials Science and Energy Materials

材料科学;能源学

Ali Khan, Sayed^1 ; Wu, Shaoqi^1 ; Wei Ji, Wei^2 ; Hao, Luyuan^2 ; Agathopoulos, Simeon^3 ; Xu, Xin^2 ; Zhu, Ling^1 ; Wang, Xinzhong^4

Shenzhen Key Laboratory of Flexible Memory Materials and Devices, College of Electronic Science and Technology, Shenzhen University, Nanhai Ave. 3688, Shenzhen, Guangdong

518060, China^1

Chinese Academy of Sciences Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui

230026, China^2

Department of Materials Science and Engineering, University of Ioannina, Ioannina

GR-451 10, Greece^3

School of Electronic Communication and Technology, Shenzhen Institute of Information Technology, Shenzhen

518172, China^4

关键词: Different lights;    Excitation bands;    Excitation wavelength;    Green emissions;    Intensity of emission;    Luminescence properties;    Oxynitride phosphor;    Solid state reaction route;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/490/2/022044/pdf
DOI  :  10.1088/1757-899X/490/2/022044

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

As possible alternative applying to trichromatic white LEDs, oxynitirde phosphors which are consist of a range of Y-Si-ON: single doped Ce3+ and Y-Si-ON: Ce3+\Tb3+ co-doping were smoothly prepared with the use of typical solid state reaction route. Not only the purity of the resulting phosphors was raised, but also the intensity of emission was enhanced due to the introduction of Li2CO3 flux (5wt %). A strong wide excitation band is suitable for UV LED chips that is ranging from 200 nm to 400 nm having maximum peak around 358 nm has been noticed. In the Ce3+ mono-doped phosphor, we noted a strong blue emission whose peak is at 439 nm at this excitation wavelength and in the Y5Si3O12N:Ce3+/Tb3+ co-doped phosphors two different light bands were also noted: the blue band was at 439 nm when reached its peak due to the Ce3+ ion and because of the and a highly efficient green emission of having maximum peak around 549 nm as a result of Tb3+ ions transitions (5D4→7F5).