中国物理B ›› 2018, Vol. 27 ›› Issue (7): 78102-078102.doi: 10.1088/1674-1056/27/7/078102
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
Silica encapsulated ZnO quantum dot-phosphor nanocomposites: Sol-gel preparation and white light-emitting device application
Ya-Chuan Liang(梁亚川), Kai-Kai Liu(刘凯凯), Ying-Jie Lu(卢英杰), Qi Zhao(赵琪), Chong-Xin Shan(单崇新)
- 1 School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, China;
2 State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
Silica encapsulated ZnO quantum dot-phosphor nanocomposites: Sol-gel preparation and white light-emitting device application
Ya-Chuan Liang(梁亚川)1, Kai-Kai Liu(刘凯凯)2, Ying-Jie Lu(卢英杰),1, Qi Zhao(赵琪)1, Chong-Xin Shan(单崇新)1
- 1 School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, China;
2 State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
摘要：
ZnO quantum dots (QDs) as an eco-friendly and low-cost material has bright fluorescence, which makes it promising material for healthy lighting and displaying. However, the low fluorescence efficiency and poor stability of ZnO QDs impede their applications in lighting application. In this work, silica encapsulated ZnO QD-phosphors nanocomposites (ZSPN) have been prepared through a sol-gel synthesis process, where yellow-emitting ZnO QDs and blue-emitting BaMgAl10O17:Eu2+ are employed as the luminescence cores and silica as link between two luminescence materials. Tunable photoluminescence of ZSPN and the white light emission have been achieved through changing mass ratio of both of ZnO QDs and commercial phosphors. The PLQY of the ZSPN can reach 63.7% and they can maintain high luminous intensity even the ambient temperature up to 110 ℃ and after 35 h of UV irradiation. In addition, they can keep stable for 40 days. By coating the ZSPN phosphors onto a ultraviolet chip, WLEDs with luminous efficiency of 73.6 lm/W and the color coordinate, correlated color temperature, and color rendering index can reach (0.32, 0.34), 5580 K, and 87, respectively, indicating the bright prospect of the ZSPN phosphors used in healthy lighting.
中图分类号: (Quantum dots)
- 81.07.Ta