| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1523227 | Materials Chemistry and Physics | 2012 | 4 Pages |
Yb3+/Er3+ co-doped Gd6WO12 nanoparticles were prepared via a coprecipitation technique and characterized by means of XRD and FE-SEM. The effect of excitation power density in different regions on the upconversion mechanisms was investigated. It was found that the green upconversion emissions is a two photons process when the excitation power density is low, but a three photons process occurs when the excitation power density is high. However, the red upconversion emission is still a two photons process. A possible mechanism for three photons green upconversion luminescence was proposed and discussed.
► Yb3+/Er3+ doped Gd6WO12 nanoparticles were prepared ► The effect of power on upconversion in Gd6WO12 nanoparticles was found ► A possible mechanism for three photons green upconversion was proposed
