| 학회 |
한국화학공학회 |
| 학술대회 |
2008년 가을 (10/23 ~ 10/24, 부산 BEXCO) |
| 권호 |
14권 2호, p.3414 |
| 발표분야 |
재료 |
| 제목 |
Field Emission Properties of Non-catalytically Grown ZnO Nanostructures |
| 초록 |
In this paper, we report the synthesis, structural, optical and field emission properties of ZnO nanostructures grown by thermal evaporation process in the temperature ranges of 450-650 °C. The detailed structural and optical observations revealed that the grown products are possessing single crystallinity with the wurtzite hexagonal phase and good optical properties. The performances of the field-emission devices based on the as-grown products have also been characterized. Vertically-aligned hexagonal-shaped ZnO nanorods show the turn-on electric field at about 5.8 V/μm with the emission current density of 0.061 mA/cm2which was achieved at the electrical field of 9.0 V/m. The current density shows no saturation in the current while the field enhancement factor ‘β’ was estimated to be about ~2.081 × 103. Flower-shaped nanostructures are exhibiting the turn-on field of 4.5 V/μm with the emission current density of 0.073 mA/cm2 which was achieved at the electrical field of 7.1 V/m. In this case also, the current density shows no saturation in the current and the field enhancement factor ‘β’ was estimated to be about ~2.9 × 103. |
| 저자 |
Umar Ahmad, 이은원, Mohammad Vaseem, 박용규, 김진환, 한윤봉
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| 소속 |
전북대 |
| 키워드 |
field emission; non-catalytically; ZnO nanostructures
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| E-Mail |
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| 원문파일 |
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