Abstract
Research comparing the advantages of spin coating and chemical bath deposition is going, and there are varied views on these methods. Here, we used spin coating and chemical bath deposition to prepare thin films of ZnS nanoparticles. The film was analysed by photoluminescence (PL) spectrophotometry, field emission scanning electron microscopy (FE-SEM), ultraviolet spectroscopy (UV-Vis), and energy-dispersive X-ray (EDX) spectroscopy. The UV-Vis spectra revealed that the wavelength of ZnS is between 220 nm - 320 nm while the PL spectra showed a peak centred in the blue region. Both spin coating and chemical bath deposition rendered spherical nanoparticles but of different sizes 17.9 nm and 21.2 -25.7 nm, respectively. It was concluded that each method has its potential. This work can help researchers choose a suitable method for fabricating thin films, depending on the aims and objectives of their work.
Highlights
The deposition of thin films of nanoparticles on substrates using diverse methods is still a topic of interest among researchers
ZnS thin films are synthesized by methods such as thermal evaporation [1], spray pyrolysis [2, 3], sputtering [4, 5, 6], pulsed laser deposition [7, 8], chemical vapor deposition [9, 10], successive ionic layer adsorption and reaction (SILAR) [11], chemical bath deposition [12, 13, 14, 15, 16], chemical deposition [17], chemical precipitation [18, 19, 20], spin coating [21, 22, 23, 24, 25, 26], dip coating [22, 28, 29, 30], green synthesis [31, 32, 33, 34], electro-deposition [35], and thermolysis [36, 37, 38, 39, 40]
field emission scanning electron microscopy (FE-SEM) images were obtained for the ZnS thin films deposited on glass substrates in order to study the surface of the thin films, especially their size and pattern
Summary
The deposition of thin films of nanoparticles on substrates using diverse methods is still a topic of interest among researchers. ZnS thin films are synthesized by methods such as thermal evaporation [1], spray pyrolysis [2, 3], sputtering [4, 5, 6], pulsed laser deposition [7, 8], chemical vapor deposition [9, 10], successive ionic layer adsorption and reaction (SILAR) [11], chemical bath deposition [12, 13, 14, 15, 16], chemical deposition [17], chemical precipitation [18, 19, 20], spin coating [21, 22, 23, 24, 25, 26], dip coating [22, 28, 29, 30], green synthesis [31, 32, 33, 34], electro-deposition [35], and thermolysis [36, 37, 38, 39, 40]. Nabachandra et al [42]
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