XAS Microstructure Analysis of Manganese Doped Zinc Sulphide Nanophosphor

This paper reports wet chemical synthesis of Manganese doped Zinc Sulphide Nanophosphors capped with polyvinyl alcohol (PVA) while varying the concentrations of the dopant and capping agent to explore the optoelectronic and microstructural properties. Optical and morphological comparative studies re...

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Bibliographic Details
Published in:IEEE transactions on nanotechnology 2020, Vol.19, p.360-367
Main Authors: Sahay, Prakhar, Priya, R., Saxena, Nishtha, Rajput, Parasmani, Jha, Shambhu Nath, Bhattacharyya, Dibyendu, Krishna, Richa, Sinha, Om Prakash
Format: Article
Language:English
Subjects:
Absorption
Capping
Chemical synthesis
Comparative studies
Dopants
II-VI semiconductor materials
Luminescence
Manganese
Microstructure
Mn doped ZnS
Nanoparticles
Nanophosphors
Optical properties
Optoelectronics
Photonic band gap
Polyvinyl alcohol
PVA
Room temperature
Wurtzite
XAS
Zinc compounds
Zinc sulfide
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Summary:This paper reports wet chemical synthesis of Manganese doped Zinc Sulphide Nanophosphors capped with polyvinyl alcohol (PVA) while varying the concentrations of the dopant and capping agent to explore the optoelectronic and microstructural properties. Optical and morphological comparative studies reveal strongest room temperature orange luminescence (~591 nm) of 10% dopant concentration with 2% capping agent in the ZnS host lattice and irregularly spherical nanoparticles formation (~29 nm). Further, structural and elemental study of the sample reveals uncontaminated hexagonal wurtzite nanoparticles with least structural distortion due to dopant induced substitutional defect. The XANES and EXAFS microstructure analysis confirm the creation of substitutional defect and comparable Zn-S and Mn-S bond lengths such that Mn luminescent centers are created. Hence, the detailed study of the material indicates its high efficiency, proving its ability to be explored as a strong candidate for Mn: ZnS based UV Photodetector devices.
ISSN:1536-125X
1941-0085
DOI:10.1109/TNANO.2020.2991012