標題: Single-crystalline MgxZn1-xO (0 <= x <= 0.25) nanowires on glass substrates obtained by a hydrothermal method: growth, structure and electrical characteristics
作者: Lee, CY
Tseng, TY
Li, SY
Lin, P
材料科學與工程學系
電子工程學系及電子研究所
Department of Materials Science and Engineering
Department of Electronics Engineering and Institute of Electronics
公開日期: 1-八月-2005
摘要: Single-crystalline Mg-x-Zn1-xO(0 <= x <= 0.25) nanowires (MZONWs) were synthesized on glass substrates by a hydrothermal method using a mixture of an aqueous solution of zinc nitrate hexahydrate, magnesium nitrate hexahydrate and diethylenetriamine at temperatures that ranged from 75 to 105 degrees C. X-ray diffraction, scanning electron microscopy and transmission electron microscopy investigations were carried out to characterize the crystallinity, surface morphologies and orientations of these nanowires, respectively. These nanowires with direct band gaps ranging from 3.21 to 3.95 eV emitted ultraviolet photoluminescence from 406 to 397 nm at room temperature as the Mg content increased. Field emission measurements revealed that the turn-on electric field and threshold electric field (current density of 1 mA cm(-2)) of ZnO NWs are 1.6 and 2.1 V mu m(-1) with the value of 3340. Therefore, low temperature synthesized MZO NWs (0 <= x <= 0.25) with modulated band gaps may be applied in solar cells, light emission devices and other nanoheterojunction devices in the future.
URI: http://dx.doi.org/10.1088/0957-4484/16/8/019
http://hdl.handle.net/11536/13448
ISSN: 0957-4484
DOI: 10.1088/0957-4484/16/8/019
期刊: NANOTECHNOLOGY
Volume: 16
Issue: 8
起始頁: 1105
結束頁: 1111
顯示於類別:期刊論文


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