Grown and Characterization of ZnO Aligned Nanorod Arrays for Sensor Applications
Autor: | E. E. Yakimov, Eugene B. Yakimov, Maria V. Evstafieva, Arkady N. Redkin |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Technology
Control and Optimization Materials science Annealing (metallurgy) Energy Engineering and Power Technology Photodetector Cathodoluminescence 02 engineering and technology self-catalytic CVD method 01 natural sciences Crystal symbols.namesake Responsivity Electrical resistivity and conductivity 0103 physical sciences photoresponse Electrical and Electronic Engineering Engineering (miscellaneous) 010302 applied physics ZnO nanorod Renewable Energy Sustainability and the Environment business.industry cathodoluminescence 021001 nanoscience & nanotechnology symbols Optoelectronics Nanorod 0210 nano-technology Raman spectroscopy business Energy (miscellaneous) |
Zdroj: | Energies Volume 14 Issue 13 Energies, Vol 14, Iss 3750, p 3750 (2021) |
ISSN: | 1996-1073 |
DOI: | 10.3390/en14133750 |
Popis: | ZnO nanorods are promising materials for many applications, in particular for UV detectors. In the present paper, the properties of high crystal quality individual ZnO nanorods and nanorod arrays grown by the self-catalytic CVD method have been investigated to assess their possible applicationsfor UV photodetectors. X-ray diffraction, Raman spectroscopy and cathodoluminescence investigations demonstrate the high quality of nanorods. The nanorod resistivity and carrier concentration in dark is estimated. The transient photocurrent response of both as grown and annealed at 550 °C nanorod array under UV illumination pulses is studied. It is shown that annealing increases the sensitivity and decreases the responsivity that is explained by oxygen out-diffusion and the formation of near surface layer enriched with oxygen vacancies. Oxygen vacancy formation due to annealing is confirmed by an increase of green emission band intensity. |
Databáze: | OpenAIRE |
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