Upconversion and pump saturation mechanisms in Er3+/Yb3+ co-doped Y2Ti2O7 nanocrystals
- Resource Type
- Authors
- Jianguo Tian; Chengguo Ming; Gong Zhang; Qiong Li; Feng Song; Yingdong Han; Fengxiao Wang
- Source
- Journal of Applied Physics. 115:134310
- Subject
- Ytterbium
Materials science
Photoluminescence
Analytical chemistry
Physics::Optics
General Physics and Astronomy
chemistry.chemical_element
Phosphor
Rate equation
Photon upconversion
Nanocrystalline material
Condensed Matter::Materials Science
chemistry
Transmission electron microscopy
X-ray crystallography
- Language
- ISSN
- 1089-7550
0021-8979
The Er3+/Yb3+ co-doped Y2Ti2O7 nanocrystals were synthesized by the sol–gel method. X-ray diffraction, transmission electronic microscopy, and photoluminescence spectra were measured to verify the Y2Ti2O7 nanocrystalline produced in the sample annealed at 800 °C. The anomalous slopes of the fitted line in the log-log plots for upconversion emissions and the pump-saturation effect of near-infrared emission were observed in the nanocrystalline samples. A theoretical model of practical Er3+/Yb3+ co-doped system based on the rate equations were put forward and explained the experimental phenomena well.