| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
|
|
|
|
Upconversion Luminescence of Er3+ Ions in Transparent Germanate Glass Ceramics Containing CaF2 Nanocrystals |
WU Dong1,2, TANG Bin1, Laurent Calvez3, ZHANG Xiang-Hua3, ZHANG Long1 |
| 1Key Laboratory of High-Power Laser Materials, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 2Graduate School of Chinese Academy of Sciences, Beijing 100049 3Laboratory of Glasses and Ceramics, University of Rennes, Rennes 35042, France |
|
| Cite this article: |
|
WU Dong, TANG Bin, Laurent Calvez et al 2010 Chin. Phys. Lett. 27 067804 |
|
|
|
|
Abstract The visible upconversion and near-infrared luminescence of Er3+ ions in germanate glass ceramics containing CaF2 nanocrystals are investigated. The nanocrystals are characterized by x-ray diffraction (XRD) and transmission electron microscopy, showing their mean sizes less than 20 nm. High transmittance of the glass ceramics is displayed by absorption spectra. The upconversion luminescence intensity in the glass ceramics increases significantly with increasing temperature. Both the shifts of the XRD peaks and the Stark-split shown in the luminescence spectra indicate the entrance of the Er3+ ions into the CaF2 nanocrystals, which is confirmed by a Judd-Ofelt analysis. Possible mechanisms of the upconversion luminescence are analyzed.
|
| Keywords:
78.60.Lc
78.30.Ly
78.40.Pg
78.55.Qr
|
|
|
Received: 09 February 2010
Published: 25 May 2010
|
|
| PACS: |
78.60.Lc
|
(Optically stimulated luminescence)
|
| |
78.30.Ly
|
(Disordered solids)
|
| |
78.40.Pg
|
(Disordered solids)
|
| |
78.55.Qr
|
(Amorphous materials; glasses and other disordered solids)
|
|
|
|
|
|
[1] Wang Y H and Ohwaki J 1993 Appl. Phys. Lett. 63 3268
[2] Tick P A, Borrelli N F et al 1995 J. Appl. Phys. 78 6367
[3] Kawamoto Y, Kanno R et al 1998 J. Mater. Sci. 33 63
[4] Dejneka M J 1998 J. Non-Cryst. Solids 239 149
[5] Wang J, Qiao X S et al 2004 Physica B 353 242
[6] Qiao X S, Fan X P, Wang J and Wang M Q 2005 J. Non-Cryst. Solids 351 357
[7] Qiao X S, Fan X P and Wang M Q 2006 Scripta Materialia 55 211
[8] Qiao X S, Fan X P, Wang J and Wang M Q 2006 J. Appl. Phys. 99 074302
[9] Downing E, Hesselink L, Ralston J and Macfarlane R 1996 Science 273 1185
[10] Polosan S and Secu C E 2008 J. Optoelectron. Adv. Mater. 10 2134
[11] Jorgensen C K and Judd B R 1964 Mol. Phys. 8 281
[12] Chen D Q et al 2006 Mater. Chem. Phys. 95 264
[13] Chen D Q et al 2005 J. Phys.: Condens. Matter 17 6545
[14] Judd B R 1962 Phys. Rev. 127 750
[15] Ofelt G S 1962 J. Chem. Phys. 37 511
[16] Hu Z J et al 2006 Mater. Res. Bull. 41 217
[17] Weber M J 1968 Phys. Rev. 171 283
[18] Reisfeld R, Boehm L, Eckstein Y and Lieblich N 1975 J. Lumin. 10 193
[19] Kishi Y, Tanabe S, Tochino S and Pezzotti G 2005 J. Am. Ceram. Soc. 88 3423
[20] Reisfeld R and Eyal M 1985 J. Physique 46 349
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
