Open AccessVisable and ultraviolet upconversion luminescences of Y2O3:Yb3+,Tm3+ nanomaterials
Author(s) -
Tanggang Li,
Suwen Liu,
Enhua Wang,
Lingjun Song
Publication year - 2011
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.60.073201
Subject(s) - photon upconversion , ultraviolet , nanomaterials , excited state , materials science , emission intensity , optoelectronics , analytical chemistry (journal) , photochemistry , atomic physics , nanotechnology , photoluminescence , doping , physics , chemistry , environmental chemistry
The Y2O3:Yb3+,Tm3+ nanomaterials are prepared by a combustion method. The sample is excited by 980 nm, thereby producing a bright blue emission transition peak (476 nm and 487 nm) and a weak red emission peak(about 650 nm) that can be clearly observed. More important two ultraviolet emission peaks 1I6→3H6 (~297 nm) and 1D2→3H6 (~363 nm) are found. In addition, the change of upconversion emission intensity dependent on the Yb3+ concentrations was recorded and the possible eauses are discussed. Finally, the pump energy dependences of the emission intensity are investigated. The results show that blue and red emissions originate from a three-photon process and ultraviolet emission peak (363 nm) takes its source at a four-photon process.