Morphology-controllable synthesis of LaOF:Ln(3+) (Ln=Eu, Tb) crystals with multicolor luminescence properties.
In this paper, well defined LaOF crystals with multiform morphologies were first prepared via the urea-based precipitation method followed by a heat treatment. The morphologies of the LaOF samples, including nanospheres and nanorods, can be easily modulated by changing the fluorine sources. XRD, FT-IR, SEM, TEM, and emission spectra were used to characterize the prepared samples. Under ultraviolet excitation, the LaOF:Ln(3+) nanospheres display the characteristic f-f transitions of Ln(3+) (Ln=Eu, Tb) ions and give bright red, and green emissions, respectively. Furthermore, by codoping the Tb(3+) and Eu(3+) ions into LaOF host and varying the doping concentration of the Eu(3+) ions, multicolor tunable emissions have been obtained under the irradiation of 379nm. These results show this material may have potential applications in field-emission displays.
College of Chemistry, Jilin University, Changchun 130026, PR China.
Ruiqing
R
Li
College of Chemistry, Jilin University, Changchun 130026, PR China.
Guihong
G
Yu
College of Chemistry, Jilin University, Changchun 130026, PR China.
Yimai
Y
Liang
College of Chemistry, Jilin University, Changchun 130026, PR China.
Nannan
N
Zhang
College of Chemistry, Jilin University, Changchun 130026, PR China.
Yali
Y
Liu
College of Chemistry, Jilin University, Changchun 130026, PR China. Electronic address: gansc@jlu.edu.cn.
Shucai
S
Gan
D005063:Europium / Q000737:chemistry; D005459:Fluorides / Q000737:chemistry*; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D007477:Ions; D007811:Lanthanum / Q000737:chemistry*; D049449:Luminescence; D008163:Luminescent Measurements / Q000379:methods*; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D054118:Nanospheres / Q000737:chemistry; D043942:Nanotubes / Q000737:chemistry; D010087:Oxides / Q000737:chemistry; D010316:Particle Size; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013725:Terbium / Q000737:chemistry; D014508:Urea / Q000737:chemistry; D014961:X-Ray Diffraction
D007477:Ions; D010087:Oxides; D013725:Terbium; D005063:Europium; D007811:Lanthanum; D014508:Urea; D005459:Fluorides
LaOF; Materials; Morphology; Tunable luminescence properties