Open AccessUpconversion luminescence and Spectra characteristics of Er3+, Tm3+ co-doped NaY(WO4)2 crystal
Author(s) -
Tan Hao,
Feng Song,
Jing Su,
Meiru Shang,
Bo Fu,
Guangyin Zhang,
Cheng Zhen-Xiang,
Huanchu Chen
Publication year - 2004
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.53.631
Subject(s) - photon upconversion , materials science , doping , luminescence , absorption spectroscopy , crystal (programming language) , thulium , absorption (acoustics) , analytical chemistry (journal) , spectral line , excitation , emission spectrum , optics , optoelectronics , physics , chemistry , chromatography , astronomy , computer science , composite material , programming language , quantum mechanics
Absorption spectra, emission spectra, excitation spectra, and upconversion luminescence of Er3+, Tm3+ co-doped NaY(WO4)2 crystal were measured at room temperature. Intensity parameters are calculated from absorption spectra in terms of Judd-Offelt theory. Transition processes of the energy levels of Er3+ and Tm3+ were analyzed in details and the cross relaxations: 1G4(Tm3+)4I15/2(Er3+)→3F4(Tm3+) +4F9/2(Er3+) ,1G4(Tm3+)4I15/2(Er3+)→3H5(Tm3+)4I9/2(Er3+), 3F4(Tm3+)4I9/2(Er3+)→3H6(Tm3+)4S3/2 or 2H11/2(Er3+) and 4F9/2(Er3+)3H6(Tm3+)→4I15/2(Er3+)+3F3(Tm3+) were put forward. Sufficient proofs have been found to illustrate the use of Er3+ as a sensitizer which is effective for the Tm3+-doped crystal.