Abstract
Wide bandgap semiconductors have appeared as promising materials suitable for hightemperature, high-frequency and high power operations in electronic as well as optoelectronic devices because of their exceptional material characteristics. More specifically, ZnO and CdO films possess an outstanding ability to materialize short wavelength light emitting devices due to their large band gap energy. ZnO and CdO nanocrystals are widely used for optoelectronic applications in the shortwavelength visible-light region especially for laser diodes (LDs) and light emitting diodes (LEDs). In spite of this, it is challenging to grow high-purity high-quality single crystals since these crystals have very strong bonding with a nearly equal balance of covalent and ionic bonding. The present review focuses on the properties and applications of pure and doped ZnO and CdO thick films synthesized by screen printing techniques with tunable morphology and composition. Screen printing method has been a novel, simple, quicker and an eco-friendly method for film preparation on large area substrates with maximum utilization as compared to the other expensive methods. We have outlined currently employed major techniques for the characterization of pure and doped ZnO and CdO thick films. Their structural, optical and electrical properties have been studied and we have tried to synchronize the results with recent works done by several authors in past five years. An interesting correlation among such properties of these two films has been reported.
Keywords: CdO, electroluminescent, optoelectronic applications, screen printing, thick films, ZnO.
Graphical Abstract
Related Books
Recent Developments in Artificial Intelligence and Communication Technologies
Emerging Technologies and Applications for a Smart and Sustainable World
Solar Thermal Systems: Thermal Analysis and its Application
Image Processing in Renewable Energy Resources: Opportunities and Challenges
Recent Advances in Renewable Energy
6G Wireless Communications and Mobile Networking
Thermal Cycles of Heat Recovery Power Plants
22
6
2
1