Abstract
Background: ZnO nanorod arrays (ZnO-NRA) are promising materials for the current research. The hydrothermal synthesis is considered as the most promising method for ZnO growth. ZnO-NRA-based UV sensors have been focused upon because of their use in the various fields. In this work, we fabricated zinc oxide (ZnO) nanorod array (NRA)-based metal–semiconductor–metal (MSM) UV sensors on glass substrates.
Methods: The ZnO-NRA was grown above ZnO-seed layer/glass using a low-temperature hydrothermal method. The MSM structure-based sensor was fabricated by depositing interdigitated contacts of Ag on NRA/glass samples. The crystalline structure and surface morphology of NRA were examined by X-ray diffraction and scanning electron microscopy. The values of responsivity and photocurrent to dark current ratio were obtained from the I-V characteristics of the MSM UV sensors. Results: The grown single-crystalline ZnO nanorods were highly dense and uniform. The contrast ratio (C.R.) was found to be 9.20 at 1.50 V. The responsivity of UV sensors was found to be 0.122 mA/W at λ=365 nm. Conclusion: ZnO nanorods were grown on glass substrates using a low-temperature hydrothermal method and the I-V characteristics of Ag/ZnO-NRA/Ag based MSM UV sensors were tested under UV light. The MSM UV sensors exhibited a photo current to dark current ratio of ~ 9.20 at 1.50 V, and a responsivity of 0.122 mA/W at 365 nm. These results can provide a deep insight into fabricating simpler, efficient, and inexpensive UV sensors for practical applications.Keywords: Zinc oxide, hydrothermal, nanorod array, silver, UV sensors, metal-semiconductor-metal structure, glass substrate.
Graphical Abstract
Call for Papers in Thematic Issues
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The application of nanoscience has brought about a revolution in the field of mechanical engineering by providing novel materials, boosting manufacturing processes, and generating cutting-edge products. The purpose of this special issue is to investigate the enormous impact that nanoscience has had on mechanical engineering, with a particular emphasis on ...read more
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This special issue collection will highlight developments on the recent trends about the synthesis of metal oxides, nanoclusters, biomaterials, 2D nanomaterials, nanocrystals, nanocomposites, etc. and their applications in electrochemical systems, tissue regeneration, energy storage and harvesting, sensors, etc. The novelty of the methods in the chemical synthesis and their characterizations, ...read more
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This thematic issue will discuss the recent advances in graphene-based nanomaterials for different energy technologies. Graphene possesses a high surface area, and stable structure and exhibits many interesting electronic, optical, and mechanical properties due to its 2D crystal structure. Graphene is of both fundamental interest and suitable for a wide ...read more
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