Open AccessOptical properties of GaN:Tb nanoparticles synthesized by simple ammonification method
Author(s) -
Xiaojun Pan,
An Xiu-Yun,
Haijun Zhang,
Zhenxing Zhang,
Erqing Xie
Publication year - 2013
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.62.037105
Subject(s) - raman spectroscopy , materials science , photoluminescence , octahedron , ion , spectral line , phase (matter) , nanoparticle , analytical chemistry (journal) , phonon , hexagonal phase , hexagonal crystal system , molecular physics , optoelectronics , nanotechnology , crystallography , condensed matter physics , optics , chemistry , physics , organic chemistry , chromatography , astronomy
GaN:Tb nanoparticles are synthesized by simple ammonification of a mixture of Ga(NO3)3 and Tb(NO3)3. The XRD result shows that the sample predominantly presents hexagonal phase of GaN and its average grain size is 22.1 nm. TEM images show that the sizes of the particles are almost uniform. Besides conventional GaN Raman shifts, two extra peaks at 251 and 414 cm-1 observed in the Raman spectra can be attributed to the phonons activated by surface disorders or finite-size effects and vibration mode of N-rich octahedral Ga-N6 bonds, respectively. From photoluminescence spectra, four characteristic peaks of Tb3+ions are clearly observed: 5D4 →7F6(493.9 nm), 5D4 →7F5(551.2 nm), 5D4 →7F4(594.4 nm), 5D4 →7F3(630.1 nm).