White up-conversion emission in Ho3+/Tm3+/Yb3+ tri-doped glass ceramics embedding BaF2 nanocrystals

✍ Scribed by Chenxia Li; Shiqing Xu; Rengguang Ye; Degang Deng; Youjie Hua; Shilong Zhao; Songlin Zhuang

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 532 KB
• Volume: 406
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2011.01.073

✦ Synopsis

Ho 3 + /Tm 3 + /Yb 3 + tri-doped glass ceramics with white light emitting have been developed and demonstrated. Pumped by 980 nm laser diode (LD), intensive red, green and blue up-conversions (UC) were obtained. The green emission is assigned to Ho 3 + ion and the blue emission is assigned to Tm 3 + ion, whereas the red emission is the combination contribution of the Ho 3 + and Tm 3 + ions. The RGB intensities could be adjusted by tuning the rare-earth ion concentration and pump power intensity. Thus, multicolor of the luminescence, including perfect white light with CIE-X ¼0.329 and CIE-Y ¼ 0.342 in the 1931 CIE chromaticity diagram can be obtained in 0.15 Ho 3 + /0.2Tm 3 + /3Yb 3 + tri-doped glass ceramics embedding BaF 2 nanocrystals pumped by a single infrared laser diode source of 980 nm at 500 mW. The up-conversion luminescence mechanism of Yb 3 + sensitize Ho 3 + and Tm 3 + ions and the energy transfer from Ho 3 + to Tm 3 + in oxy-fluoride silicate glass ceramics were analyzed.