ZnO/CdS nano composite for visible light emission

The color tunability property of nano-sized semiconducting materials for broad range visible light emission (400-700 nm) depends upon the excitation wavelength, particle size, and sintering temperature. Defect states are the most common cause of visual emission from semiconducting materials. A lot o...

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Bibliographic Details
Main Authors: Kaur, Jasmeen, Rani, Suman
Format: Conference Proceeding
Language:English
Subjects:
Cadmium sulfide
Defects
Emission analysis
Hexagonal phase
Light emission
Optoelectronics
Particle size
Sintering (powder metallurgy)
Wurtzite
Zinc oxide
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Summary:The color tunability property of nano-sized semiconducting materials for broad range visible light emission (400-700 nm) depends upon the excitation wavelength, particle size, and sintering temperature. Defect states are the most common cause of visual emission from semiconducting materials. A lot of work had been reported on visible emission due to defect centers. An attempt has been made to study the visible emission from pure ZnO, pure CdS and ZnO/CdS nano composite sintered at 600oC. Powder XRD spectra of the samples were indexed using JCPDC file No. 36-1451 confirming the hexagonal wurtzite phase. XRD pattern confirmed that CdS in ZnO did not change the hexagonal phase of ZnO. The average particle size of ZnO/CdS composite was 56.8 nm where pure ZnO had average particle size of 39 nm. The emission properties of pure ZnO, pure CdS and ZnO/CdS composite have multicolor emission due to defect center. With the introduction of CdS in ZnO, the emission properties of the ZnO/CdS nano composite were enhanced. As a result, ZnO/CdS nano composites have greater potential for optoelectronic applications than pure ZnO and CdS.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0143233