Oxygen annealing effect on field-emission characteristics of hydrothermally synthesized Al-doped ZnO nanowires
| Autor: | I-Che Lee, C.C. Hwang, Tsang-Yen Hsieh, Po-Yu Yang, Der-Chi Shye, Jyh-Liang Wang |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Al content Doping Analytical chemistry Zno nanowires Nanowire chemistry.chemical_element Surfaces and Interfaces General Chemistry Condensed Matter Physics Oxygen Hydrothermal circulation Surfaces Coatings and Films Field electron emission chemistry Materials Chemistry Oxygen annealing |
| Zdroj: | Surface and Coatings Technology. 231:423-427 |
| ISSN: | 0257-8972 |
| Popis: | article i nfo Al-doped ZnO (AZO) nanowires (NWs) were synthesized using low-temperature hydrothermal growth to in- vestigate field emission (FE) characteristics. The intensity ratio of NBE peak to DLE peak (R=INBE/IDLE) in- creases and the half-maximum of NBE peaks (FWHMNBE) decreases with the Al contents. Experimental results reveal the FE characteristics of AZO NWs are functions of Al content. Moreover, the larger R value and the smaller FWHMNBE are found as the oxygen annealing temperature increases. The hydrothermal AZO NWs annealed in oxygen ambience with an appropriate temperature (i.e. 300-500 °C) can demonstrate the furtherimproved FEproperties(i.e.the turn-on field of 1.70 V/μm(at1μA/cm 2 ),threshold fieldof2.92 V/μm (at 1 mA/cm 2 ), and β of 4547). |
| Databáze: | OpenAIRE |
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