Synthesis of copper doped Zinc oxide nanowires with enhanced ultraviolet photoresponse behavior
| Autor: | Tae Il Lee, S. P. Ghosh, A Moharana, Kalyan Das, G. Bose, J.M. Myoung, N. Tripathy, Dong Ha Kim, Jyoti Prakash Kar, A Adhikari |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Photocurrent Materials science Dopant business.industry Scanning electron microscope Doping Nanowire chemistry.chemical_element 02 engineering and technology Zinc 021001 nanoscience & nanotechnology medicine.disease_cause 01 natural sciences chemistry Photosensitivity 0103 physical sciences medicine Optoelectronics 0210 nano-technology business Ultraviolet |
| Zdroj: | IOP Conference Series: Materials Science and Engineering. 178:012021 |
| ISSN: | 1757-899X 1757-8981 |
| DOI: | 10.1088/1757-899x/178/1/012021 |
| Popis: | This work mainly focused on the synthesis of copper doped zinc oxide nanowires by hydrothermal method, their characterization and their ultraviolet (UV) light sensing response at room temperature. The structural and morphological characterization was carried out using X-ray diffraction and scanning electron microscopy. Enhanced ultraviolet (UV) photodetection property has been achieved for a dopant concentration of 2.5wt% and 5wt% showing UV photosensitivity values (photo-to-dark current ratio) of around 800 and 1800, respectively. This is an order of magnitude higher than the undoped ZnO nanowires. High photocurrent gain is attributed to the trapping of carriers under dark and detrapping them under UV illumination by Cu-related defects. Enhancement in photosensitivity indicates that Cu-doped ZnO nanowires are promising candidates for UV photodetection applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|