Open AccessUp-conversion luminescence and temperature characteristics of Tm3+, Yb3+ co-doped CaWO4 polycrystal material
Author(s) -
Longjiang Zheng,
Yaxin Li,
Hailong Liu,
Weiqi Xu,
Zhiguo Zhang
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.240701
Subject(s) - materials science , doping , luminescence , analytical chemistry (journal) , fluorescence , excitation , atmospheric temperature range , laser , optics , optoelectronics , thermodynamics , chemistry , physics , electrical engineering , chromatography , engineering
Tm3+, Yb3+ co-doped CaWO4 polycrystals are synthesized via the high temperature solid state method. Under excitation of a 980 nm laser, the up-conversion fluorescences based on the transitions 1G4→3H6, 1G4→3H4, 3H2→3H6 and 3H3→3H6 in the visible light region are successfully obtained. The effect of the concentration change of Yb3+ on the luminous intensity of Tm3+ is discussed. Meanwhile, the temperature properties of the red up-conversion fluorescences centered at 689 nm and 705 nm are studied in a tem-perature range between 313 and 773 K according to the fluorescence intensity ratio method. It is found that the temperature can be monitored by detecting the red up-converion fluorescences of Tm3+, Yb3+ co-doped CaWO4 polycrystals. The maximal sensitivity of temperature measurement can be achieved to be 5.7×10-4 K-1 at 458 K.