https://doi.org/10.1140/epjp/s13360-024-05550-z
Regular Article
Effect of pH on the optical properties of ZnS:Eu synthesized by the hydrothermal method
1
School of Physics and Materials Engineering, Dalian Minzu University, 116600, Dalian, China
2
Liaoning Key Laboratory of Optoelectronic Films and Materials, Dalian Minzu University, 116600, Dalian, China
Received:
14
November
2023
Accepted:
11
August
2024
Published online:
19
August
2024
ZnS:Eu nanoparticles were synthesized using a hydrothermal method at 200 °C. The study examined the effects of Eu doping concentration on the structure, morphology, and optical properties of the samples in both acidic (pH 2) and alkaline (pH 10) environments. The results showed that the structure of all samples was cubic in acidic environments, while in alkaline environments, the crystal phase transitioned from cubic to hexagonal with increasing Eu doping concentration. The samples grown in acidic environments were smaller in size. A blue emission was observed for all samples. The PL luminescence intensity decreased with increasing Eu doping concentration, and the decrease was more pronounced in alkaline environments due to phase transition. The band gap width was adjusted by the Eu doping concentration and pH value.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
