Journal
ACS OMEGA
Volume 3, Issue 1, Pages 137-143Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.7b01574
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Funding
- National Natural Science Foundation of China [61205180]
- Natural Science Foundation of Hebei Province [E2017201209]
- Hebei Province Universities Science and Technology Program [QN2017017]
- first batch of young talent support plan of Hebei Province
- National Science Foundation of Hebei University [799207217027, 799207217035]
- distinguished young scholars of Hebei University [2012JQ01]
- Midwest universities comprehensive strength promotion project
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Pure and Eu3+-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/xEu(3+) was calculated according to absorption spectroscopy, and an obvious red shift with the increasing molar fraction of Eu3+-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/xEu(3+) included the characteristic emission peak of ZnS and Eu3+ ions. The CIE chromaticity coordinates of the ZnS/xEu(3+) sample varied with the molar fraction of Eu3+ 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 Eu3+ ions, changing the ratio of Zn and S, or adding moderate ethanol as the reaction medium.
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