Effect of Electric Current on Oxidation of Zn Films to ZnO Films Using Electrochemical System
| Autor: | Woosung Jeon, Jae-Young Leem |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Photocurrent
Materials science Photoluminescence business.industry 020502 materials Biomedical Engineering Bioengineering 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry Spectral line Responsivity 0205 materials engineering Optoelectronics General Materials Science Crystallite Electric current 0210 nano-technology business Dark current |
| Zdroj: | Journal of Nanoscience and Nanotechnology. 18:6095-6100 |
| ISSN: | 1533-4880 |
| DOI: | 10.1166/jnn.2018.15613 |
| Popis: | In this study, we fabricated ZnO films from Zn films using an electrochemical system under different oxidation currents of 0.2, 0.5, 1, and 2 mA. Most of the samples showed fluctuating potential values near 0 V, and the pH value also showed the same tendency. The morphology of the ZnO films showed a polycrystalline film form and short hexagonal pillars at the underside and upside, respectively, due to the preferred growth of (101) orientation. In the photoluminescence spectra, the highest value of the near band-edge and deep-level emission ratio indicated that a high-quality ZnO film was obtained. To investigate the photoresponse properties, we measured the dark current and photocurrent using a current-voltage measurement system. The ZnO films with the highest quality showed a large number of photocurrent generations and high responsivity value. We expect that this method can offer a novel method of studying the growth of high-quality ZnO films for application to optoelectronic devices. |
| Databáze: | OpenAIRE |
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