Nanorod Arrays Enhanced UV Light Response of Mg-Doped ZnO Films
| Autor: | San-Lin Young, Der-Yuh Lin, Ming-Cheng Kao, Hone-Zern Chen, Wen-Yi Sung |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Silicon Band gap General Mathematics chemistry.chemical_element 02 engineering and technology medicine.disease_cause 01 natural sciences Crystal nanorod arrays 0103 physical sciences Computer Science (miscellaneous) medicine light response Sol-gel 010302 applied physics business.industry lcsh:Mathematics Doping hydrothermal growth 021001 nanoscience & nanotechnology lcsh:QA1-939 Nanocrystalline material sol–gel chemistry Chemistry (miscellaneous) ZnO Optoelectronics Nanorod 0210 nano-technology business Ultraviolet |
| Zdroj: | Symmetry Volume 12 Issue 6 Symmetry, Vol 12, Iss 1005, p 1005 (2020) |
| ISSN: | 2073-8994 |
| DOI: | 10.3390/sym12061005 |
| Popis: | Zn1&minus xMgxO (x = 0, 0.03, 0.05, and 0.07) nanocrystalline films were grown on silicon substrates using the sol&ndash gel method. Furthermore, Zn1&minus xMgxO vertically aligned hexagonal symmetrical nanorods with six reflection symmetries were fabricated on pure ZnO-seeded layer n-type silicon substrates via a low-temperature hydrothermal method to enhance the ultraviolet (UV) light response. The crystal microstructures and surface morphologies of nanocrystalline films and nanorod arrays were determined by X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). Transmission spectra showed that the increasing Mg content will increase the band gap energy from 3.28 to 3.46 eV. However, the current&ndash voltage curves in the dark and under UV illumination showed that the UV response did not improve by the incorporation of magnesium. We changed the flat surface of films into symmetrical nanorod arrays and demonstrated they can significantly enhance the normalized photo-to-dark-current ratio up to ten times. |
| Databáze: | OpenAIRE |
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