Opto-electrical investigation of Zn metal-doped CdS and their application in soft lithographic technique
Un-doped CdS and Zn metal-doped CdS (0.1-0.5 M) were synthesized by chemical precipitation method. Properties like optical band gap and conductivity were determined by different characterization techniques. UV-Visible spectroscopy was applied to estimate the band gap where it showed a significant...
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| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Penerbit Universiti Kebangsaan Malaysia
2020
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| Online Access: | http://journalarticle.ukm.my/15781/1/10.pdf http://journalarticle.ukm.my/15781/ http://www.ukm.my/jsm/malay_journals/jilid49bil8_2020/KandunganJilid49Bil8_2020.html |
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| Summary: | Un-doped CdS and Zn metal-doped CdS (0.1-0.5 M) were synthesized by chemical precipitation method. Properties
like optical band gap and conductivity were determined by different characterization techniques. UV-Visible
spectroscopy was applied to estimate the band gap where it showed a significant blue shift due to quantum confinement
effect. Size determined by scanning electron microscopy (SEM) was found to be in nanorange from 41 to 60 nm for
both un-doped and metal doped CdS nanocrystals. EDAX confirmed the doping by showing peak for Zn. XRD (X-ray
diffraction) showed the lattice structure to be cubic for the synthesized nanoparticles and conductivity for un-doped
CdS was 7.69E-6 Ω-1m-1
where it changes to 9.25E-6 Ω-1
m-1
and 7.98E-6 Ω-1m-1
for 0.2 M and 0.5 M Zn-doped CdS,
respectively. In order to obtain good results, nanocrystals having highest conductivity are used in soft lithographic
technique. Here µTM (micro transfer-molding) was followed for patterning with PDMS (poly-(dimethylsiloxane)) mold
and silicon substrate for better results. |
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