Abstract
Under 980 nm excitation, room-temperature ultraviolet (UV) upconversion (UC) emissions of Er 3+ from the 4G 9/2, 2K 13/2, and 2P 3/2 states were observed in Gd 2O 3:Yb 3+/Er 3+ nanotubes which were synthesized via a simple wet-chemical route at low temperature and ambient pressure followed by a subsequent heat treatment at 800 °C. The experimental results exhibited that these UV emissions came from four-photon UC processes. In the Gd 2O 3:Yb 3+/Er 3+ nanocrystals, the energy transfers (ETs) from Yb 3+ to Er 3+ played important roles in populating the high-energy states of Er 3+ ions. This material provides a possible candidate for building UV compact solid-state lasers or fiber lasers.
Original language | English |
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Pages (from-to) | 9765-9769 |
Number of pages | 5 |
Journal | Journal of Nanoscience and Nanotechnology |
Volume | 11 |
Issue number | 11 |
DOIs | |
State | Published - 2011 |
Externally published | Yes |
Keywords
- Erbium Ions
- Nanotubes
- Ultraviolet
- Upconversion