Tsega Moges, Dejene Francis Brihanu, Kuo Dong-Hau
Department of Physics, College of Science, Bahir Dar University, Bahir Dar, 3019, Ethiopia.
Department of Physics, University of the Free State, Qwaqwa Campus, Private Bag X13, Phuthaditjhaba, 9866, South Africa.
J Nanosci Nanotechnol. 2018 Aug 1;18(8):5785-5789. doi: 10.1166/jnn.2018.15368.
Vertically aligned undoped and Sb-doped ZnO (ZnSbO) nanorods were grown by the vapor-phase oxidation process on sapphire substrates at 700 °C using Fe as the catalyst. The effect of Sb doping on surface morphology, structural and optical properties of ZnO were studied. The grown undoped and Sb-doped ZnO nanorods have a hexagonal wurtzite structure with preferential c-axis orientation. The as-grown nanorods morphology has shown length of 2-5 μm and a diameter of 100-250 nm. An elongated nanorods and high aspect ratio was observed in Sb-doped ZnO. The undoped ZnO nanorods showed a strong and sharp ultraviolet (UV) emission centered at ~381 nm, whereas Sb-doped ZnO nanorods exhibited two defect related emissions centered at ~530 nm (green) and ~630 nm (red) with a suppressed UV emission. The dominance of the red emission in the nanorods indicates that it exhibits a much higher defect caused by the Sb doping.
以铁为催化剂，通过气相氧化法在700℃的蓝宝石衬底上生长了垂直排列的未掺杂和锑掺杂的氧化锌（ZnSbO）纳米棒。研究了锑掺杂对氧化锌表面形貌、结构和光学性质的影响。生长的未掺杂和锑掺杂的氧化锌纳米棒具有六方纤锌矿结构，且优先沿c轴取向。生长的纳米棒形貌显示其长度为2-5μm，直径为100-250nm。在锑掺杂的氧化锌中观察到纳米棒拉长且长径比高。未掺杂的氧化锌纳米棒在381nm处显示出强而尖锐的紫外发射，而锑掺杂的氧化锌纳米棒表现出两个与缺陷相关的发射，分别位于530nm（绿色）和~630nm（红色），同时紫外发射受到抑制。纳米棒中红色发射占主导，表明由于锑掺杂导致其缺陷程度更高。
