TY - JOUR
T1 - Strong UV emission in flakes-like ZnS nanoparticles synthesized by cost effective sol-gel method
AU - Kumari, Priyanka
AU - Sharma, Aashish
AU - Kumawat, Ashok
AU - Samanta, Susruta
AU - Misra, Kamakhya Prakash
AU - Rao, Ashok
AU - Kabi, Sanjib
AU - Chattopadhyay, Saikat
N1 - Funding Information:
The authors acknowledge Central Analytical Facility (CAF), Manipal University Jaipur (MUJ), India, for UV–Vis, FTIR and PL measurements. Sophisticated Analytical Instrumentation Facility (SAIF) of MUJ, India, for FESEM measurements, is also duly acknowledged.
Publisher Copyright:
© 2022
PY - 2022/1
Y1 - 2022/1
N2 - 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.
AB - 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.
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U2 - 10.1016/j.matpr.2022.01.353
DO - 10.1016/j.matpr.2022.01.353
M3 - Article
AN - SCOPUS:85129785198
SN - 2214-7853
VL - 58
SP - 642
EP - 647
JO - Materials Today: Proceedings
JF - Materials Today: Proceedings
ER -