Abstract
The jet nebulizer spray (JNS) pyrolysis method has been successfully employed to grow CuO thin films at various substrate temperatures, ranging from 300 to 600˚C. The XRD analyses revealed the monoclinic phased polycrystalline growth of the samples and exhibited the strong influence of substrate temperature (ST) on the crystallite sizes. Optical transmission and bandgap studies also showed that sample bandgaps clearly rely upon the growth temperatures. The SEM micrographs displayed the agglomerated growth of particles having golf ball-like structures. The occurrence of Cu and O in the samples were confirmed through EDS analyses. The studies on DC electrical conductivities (I-V curves) also show strong dependency on the ST. A p-CuO/n-Si diode was fabricated at the ST of 600˚C and the diode parameters like barrier height (\({\varphi }_{b}\)) and ideality factor (n) were determined under light and dark conditions.
Highlights
Transparent semiconducting oxide thin films are appealing because of their great optical qualities, high steadiness, and amazing electrical properties
The decrease particle size with temperature leads to the lattice expansion which is sensible by thermo dynamical view which is due to surface curvature, surface stress and surface defect
The corresponding calculated average conductivities for 300, 400, 500 and 600 ̊C CuO thin films are 1.21X10-11, 7.21X1010, 3.91X10-10 and 3.94X10-10 (S/cm), respectively (Fig.13). These results clearly demonstrate the σ values of CuO films are well enhanced with the increase in substrate temperature (ST)
Summary
Transparent semiconducting oxide thin films are appealing because of their great optical qualities, high steadiness, and amazing electrical properties. CuO is a non-toxic eco-friendly chemical that attracts it as an alluring choice for many research applications, in all the oxide forms of the favored stage despite everything represents a test. Scientists have focused on the extension of strategies and working methodologies for changing particle morphologies of CuO which incorporate polyol, aqueous, sol-gel, warm oxidation, and so on. These reviews proposed the production of CuO powders made of nanoflowers [13], nanowires [14], nanoribbons [15], nanosheet [16], micro-rose [17], and nanobelts [18]. A p-CuO/n-Si diode was fabricated, and characteristic features were studied under dark and light environment
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