Abstract
Luminescence of ZnS:Tm phosphor was enhanced by the addition of KCl promoter. High synthesis temperature and TmF3 concentration promoted the substitution of Tm3+ ions for Zn2+ ions, leading to the growth of Tm2S3 phase. The ionic defects were increased with the increase of Tm3+ concentration, which influenced the luminescence characteristics of phosphor when the energy transferred to the defects was not effectively cascaded to the luminescence center. KCl promoter doping facilitated the growth of hexagonal phase and decreased the phase transformation temperature of ZnS. The emission pattern and peaks of the ZnS:Tm,KCl phosphor were similar to those of ZnS:Tm phosphor. This shows that the variation in the ligand field of Tm3+ because of KCl doping was insignificant. The luminescence center concentration, the excitation energy absorption, the effective energy transfer, and the charge balance were improved by the addition of KCl promoter. Consequently, the luminescence of phosphor was effectively enhanced.
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Yang, SH., Ling, YH. (2013). Luminescence Enhancement of Sky-Blue ZnS:Tm Phosphor by Promoter Doping. In: Zhang, L., Allanore, A., Wang, C., Yurko, J.A., Crapps, J. (eds) Materials Processing Fundamentals. Springer, Cham. https://doi.org/10.1007/978-3-319-48197-5_30
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DOI: https://doi.org/10.1007/978-3-319-48197-5_30
Publisher Name: Springer, Cham
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