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