1. Enhanced upconversion emissions of NaNbO3:Er3+/Yb3+ nanocrystals via Mg2+ ions doping
- Author
-
Haiyan Zhang, Tang Jiale, Tang Xunze, Qian Yannan, Heming Ji, and Yang Zhe
- Subjects
Materials science ,Mechanical Engineering ,Doping ,Analytical chemistry ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Hydrothermal circulation ,Spectral line ,Photon upconversion ,0104 chemical sciences ,Ion ,Nanocrystal ,Mechanics of Materials ,Phase (matter) ,General Materials Science ,0210 nano-technology ,Excitation - Abstract
The rod-like NaNbO3:Er3+/Yb3+ nanocrystals codoped with Mg2+ ions were firstly synthesized by hydrothermal method. The effect of Mg2+ ions on the phase structure and morphology of NaNbO3:Er3+/Yb3+ was investigated by XRD and SEM spectra. Addition of Mg2+ ions enhanced the intensities of green and red UC emissions by about 3 times and prolonged the lifetime of the 4S3/2 → 4I15/2 transition of Er3+ ions. The pump power dependences were measured to understand the upconversion mechanism under 980 nm excitation. The tailored local environment of Er3+ ions by codoping Mg2+ ions was responsible for the improved optical characteristics of NaNbO3:Er3+/Yb3+/Mg2+ nanocrystals.
- Published
- 2021