Energy transition between Y b3+ - Tm3+ - Gd3+ in Gd3+, Y b3+ and Tm3+ Co-doped fluoride nanocrystals

✍ Scribed by Jisen Zhang; Chunyan Cao; Shaozhe Lu; Wei-ping Qin

• Publisher: Elsevier
• Year: 2011
• Tongue: English
• Weight: 228 KB
• Volume: 13
• Category: Article
• ISSN: 1875-3892
• DOI: 10.1016/j.phpro.2011.02.003

✦ Synopsis

YF 3 : 20%Gd 3+ , 20%Yb 3+ , 0.5%Tm 3+ nanocrystal has been synthesized by a hydrothermal method. The upconversion (UC) emission and energy transfer progresses between Gd 3+ -Yb 3+ -Tm 3+ under a 980-nm continuous wave semiconductor laser diode excitation have been explored. The experimental results show that the violet and ultraviolet (UV) enhancement with Tm 3+ upconversion emission occurs in the nanocrystal, and in the same time the UC emissions of Gd 3+ from 6 D 9/2 , 6 I J , 6 P 5/2 , and 6 P 7/2 states to the ground state 8 S 7/2 are obtained, too. The dynamic analysis implies that, under 980-nm excitation, the nanocrystal dimension plays a key role in the efficient energy transfer processes between Gd 3+ -Yb 3+ -Tm 3tt based on the energy matching conditions.