Effects of annealing on the photoluminescence of ZnSe nanorods coated with Au

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• 作者：Sunghoon Park ; Soyeon An ; Hyunsung Ko ; Chongmu Lee
• 关键词：Nanostructures ; Optical materials ; Annealing ; Photoluminescence spectroscopy
• 刊名：Materials Chemistry and Physics
• 出版年：15 January, 2014
• 年：2014
• 卷：143
• 期：2
• 页码：735-739
• 全文大小：889 K

文摘

Au-functionalized ZnSe nanorods were synthesized by the thermal evaporation of ZnSe powder followed by Au sputter-deposition and thermal annealing. Photoluminescence (PL) showed that the intensity of near-band edge (NBE) emission of ZnSe nanorods was enhanced remarkably by Au-coating and annealing in a H₂ atmosphere. The intensity ratio of NBE emission to the deep level emission, I_NBE/I_DL of Au-coated ZnSe nanorods after annealing in a H₂ atmosphere was 鈭?8 times higher than that of the pristine (unannealed, uncoated) ZnSe nanorods. The increase in I_NBE/I_DL might be due to a combination of carrier transfer from the defect level to the Fermi level of Au nanoparticles, surface plasmon resonance in Au nanoparticles and hydrogen passivated deep level defects.