Open AccessUpconversion luminescence properties in Er3+/Yb3+ codoped TiO2 films prepared by magnetron sputtering
Author(s) -
Mao Xin-Guang,
Jun Wang,
Jie Shen
Publication year - 2014
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.63.087803
Subject(s) - photon upconversion , materials science , luminescence , sputter deposition , optoelectronics , laser , irradiation , ion , green light , sputtering , optics , thin film , blue light , nanotechnology , chemistry , physics , organic chemistry , nuclear physics
The Er3+/Yb3+ codoped TiO2 films prepared by magnetron sputtering can emit the green light at 490 nm and the red light at 670 nm by using a 980 nm diode laser irradiation. The emission intensity of upconversion is influenced by ErxYb2-xTi2O7 crystal and concentration of Er3+/Yb3+. The experiment shows that an appropriate codoping proportion of Er3+/Yb3+ brings a notable enhancement of upconversion luminescence intensity. Er3+ plays a main role in the upconversion luminescence, and the sensitized ion Yb3+can greatly improve the efficiency of upconversion. The TiO2 film prepared by magnetron sputtering has a small density of phonon states, thus it inhibits the process of non-radiative transitions, which leads to the formation of green light at 490 nm and the intensity of red light being greater than green light.