Synthesis and Luminescent Modulation of ZnS Crystallite
by a Hydrothermal Method
Zhiren Wei
Yue Lu
Jing Zhao
Shuya Zhao
Ruiqi Wang
Nian Fu
Xu Li
Li Guan
Feng Teng
10.1021/acsomega.7b01574.s003
https://acs.figshare.com/articles/journal_contribution/Synthesis_and_Luminescent_Modulation_of_ZnS_Crystallite_by_a_Hydrothermal_Method/5759979
Pure and Eu<sup>3+</sup>-doped zinc
sulfide (ZnS) crystallites
were synthesized through a hydrothermal method using water and ethanol
(W/E) as the solvent. The powder samples have been characterized systematically
using a number of characterization techniques such as X-ray diffraction,
scanning electron microscopy, energy-dispersive spectroscopy, photoluminescence
spectroscopy, and UV–vis absorption spectroscopy. The band
gap of ZnS and ZnS/<i>x</i>Eu<sup>3+</sup> was calculated
according to absorption spectroscopy, and an obvious red shift with
the increasing molar fraction of Eu<sup>3+</sup>-doped ions was found.
The luminescent mechanism of ZnS was explored by measuring the emission
spectra of ZnS with different ratios of Zn and S. The emission spectra
of ZnS/<i>x</i>Eu<sup>3+</sup> included the characteristic
emission peak of ZnS and Eu<sup>3+</sup> ions. The CIE chromaticity
coordinates of the ZnS/<i>x</i>Eu<sup>3+</sup> sample varied
with the molar fraction of Eu<sup>3+</sup> ions. The emission intensity
and morphology changed with the ratio of W/E in the process of hydrothermal
reaction. The results indicate that the luminescence of the ZnS crystallite
can be modulated by doping a certain amount of Eu<sup>3+</sup> ions,
changing the ratio of Zn and S, or adding moderate ethanol as the
reaction medium.
2018-01-05 14:22:08
emission spectra
Hydrothermal Method Pure
UV
ZnS
Eu
CIE chromaticity coordinates
scanning electron microscopy
spectroscopy
molar fraction