Open AccessLuminescence properties and upconversion of Er3+ doped and Er3+/Yb3+ co-doped LaF3 particles
Author(s) -
Siguo Xiao,
Xiaoliang Yang,
Jianwen Ding
Publication year - 2009
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.58.3812
Subject(s) - doping , materials science , photon upconversion , excitation , analytical chemistry (journal) , luminescence , coprecipitation , precipitation , optoelectronics , inorganic chemistry , chemistry , physics , chromatography , quantum mechanics , meteorology
Er3+ doped and Er3+/Yb3+ co-doped superfine LaF3 powders are prepared using co-precipitation method. The sample shows spherical particles with size of about 250 nm. The quantum efficiencies of 4S3/2 and 4F9/2 levels in the prepared Er3+ doped LaF3 powders are calculated to be 67.0% and 71.9%, respectively. With the enhancement of the Yb3+ doping concentration, The upconvertion intensity increases as a function of excitation power more slowly due to the enhancement of the sensitization of Yb3+ to Er3+. The Er3+-Er3+ interaction is also reinforced as the Yb3+ concentration increases. This leads to the increase of the ratio of the green emission to the red one with the enhancement of Yb3+ concentration.