Room temperature photoluminescence properties of ZnO nanorods grown by hydrothermal reaction

Zinc oxide (ZnO) nanorods were fabricated by a hydrothermal reaction on silicon (Si) substrate at 95 °C for 6 hours. The ZnO seed layer was fabricated by depositing ZnO thin films on Si substrates by ultrasonic spray pyrolisis (USP). The annealing effects on crystal structure and optical properties of ZnO nanorods were investigated. The post-annealing treatment was performed at 800 °C with different environments. The annealed of ZnO nanorods were characterized by X-ray diffraction (XRD) and photoluminescence (PL) in order to analyze crystal structure and optical properties, respectively. The results show the orientations of [002], [101], [102], and [103] diffraction peaks were observed and hexagonal wurtzite structure of ZnO nanorods were vertically grown on Si substrates. The room temperature PL spectra show ultra-violet (UV) and visible emissions. The annealed of ZnO nanorods in vacuum condition (3.8 × 10−3 Torr) has dominant UV emission. Meanwhile, non-annealed of ZnO nanorods has dominant visible emis...

[1]  Joydeep Dutta,et al.  Hydrothermal growth of ZnO nanostructures , 2009, Science and technology of advanced materials.

[2]  F. D. Auret,et al.  Electrical Characterization of 1.8 MeV Proton-Bombarded ZnO , 2001 .

[3]  Wei Gao,et al.  Growth process, crystal size and alignment of ZnO nanorods synthesized under neutral and acid conditions , 2015 .

[4]  R. Eichel,et al.  Synthesis, characterization, defect chemistry, and FET properties of microwave-derived nanoscaled zinc oxide , 2010 .

[5]  Jow-Lay Huang,et al.  ZnO nanopencils: Efficient field emitters , 2005 .

[6]  Zhong Lin Wang ZnO Nanowire and Nanobelt Platform for Nanotechnology , 2009 .

[7]  Hyoun-woo Kim,et al.  Synthesis of ZnO nanorod on bare Si substrate using metal organic chemical vapor deposition , 2003 .

[8]  Q. Wan,et al.  Low-field electron emission from tetrapod-like ZnO nanostructures synthesized by rapid evaporation , 2003 .

[9]  O. Nur,et al.  Zinc oxide nanowires: controlled low temperature growth and some electrochemical and optical nano-devices , 2009 .

[10]  Xiao Wei Sun,et al.  Green electroluminescence from an n-ZnO: Er/p-Si heterostructured light-emitting diode , 2012 .

[11]  Desheng Jiang,et al.  Zinc oxide nanorod and nanowire for humidity sensor , 2005 .

[12]  M. Willander,et al.  Size-controlled growth of well-aligned ZnO nanorod arrays with two-step chemical bath deposition method , 2009 .

[13]  Guozhen Zhang,et al.  The function of a 60-nm-thick AlN buffer layer in n-ZnO/AlN/p-Si(111) , 2015, Nanoscale Research Letters.

[14]  J. J. Rodríguez,et al.  The role of seeding in the morphology and wettability of ZnO nanorods films on different substrates , 2013 .

[15]  X. W. Sun,et al.  Ion-dependent electroluminescence from trivalent rare-earth doped n-ZnO/p-Si heterostructured light-emitting diodes , 2015 .

[16]  William L. Warren,et al.  Correlation between photoluminescence and oxygen vacancies in ZnO phosphors , 1996 .

[17]  HYDROTHERMAL SYNTHESIS OF ORIENTED ZNO NANOBELTS AND THEIR TEMPERATURE DEPENDENT PHOTOLUMINESCENCE , 2004 .

[18]  Peidong Yang,et al.  Nanowire dye-sensitized solar cells , 2005, Nature materials.