Solid State-Hydrothermal Synthesis and Photoluminescence of ZnS
DOI:
https://doi.org/10.6919/ICJE.202505_11(5).0047Keywords:
Zinc Sulfide; Vacancy Defect; Photoluminescence Spectroscopy.Abstract
This study reports a novel solid-state-hydrothermal hybrid strategy for synthesizing phase-pure cubic ZnS. Starting with the high-temperature solid-state synthesis of K2Zn3S4 precursor, subsequent hydrothermal deintercalation yielded ZnS powders with cubic zinc-blende structure. Optical characterization revealed a direct bandgap of 3.50 eV and prominent red emission at 620 nm (2.0 eV) under 365 nm excitation, which can be attributed to de-trapping recombination between sulfur vacancies and zinc vacancies. This work establishes a dopant-free pathway for engineering ZnS luminescence through intrinsic defect control.
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