Strong UV emission in flakes-like ZnS nanoparticles synthesized by cost effective sol-gel method

Priyanka Kumari, Aashish Sharma, Ashok Kumawat, Susruta Samanta, Kamakhya Prakash Misra, Ashok Rao, Sanjib Kabi, Saikat Chattopadhyay

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The objective of the study is to synthesize ZnS nanoparticles (NPs) by simple cost-effective technique and analyze their optoelectronic features. Cubic single phase ZnS NPs were prepared by sol-gel process. XRD data confirms the polycrystalline growth via presence of multiple peaks along various crystallographic planes. The particles are approximately 3 nm in diameter confirming the nano size of the material. FTIR and UV–Vis spectroscopy establishes the presence of all major Zn and S bonding in the sample with slightly increased optical band gap as compared to the bulk ZnS. The larger band gap is related to smaller particle size supported by the XRD data. To understand the light emission behavior of the ZnS NPs, PL spectroscopic analysis was done. Strong UV emission is observed at 380 nm which is attributed to the hole trapping and recombination phenomena with electrons by sulphur or zinc defect states. Other comparatively feeble and broader peak is also seen at 435 which is related to surface dangling bonds. FESEM micrographs reveal the evidence of flake-like outgrowth in the sample. EDX confirms that, Zn and S are the only elements present in the material.

Original languageEnglish
Pages (from-to)642-647
Number of pages6
JournalMaterials Today: Proceedings
Publication statusPublished - 01-2022

All Science Journal Classification (ASJC) codes

  • Materials Science(all)


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