采用脉冲激光沉积(PLD)和水热法相结合,在Si和氧化铟锡(ITO)导电玻璃衬底上制备了ZnO纳米棒,并用场发射扫描电子显微镜(FE-SEM)、X射线衍射仪(XRD)、光致发光(PL)和拉曼(Raman)散射对所制备的ZnO纳米棒进行表征。FE-SEM结果显示在Si衬底上生长的ZnO纳米棒覆盖密度较高,垂直性较好。XRD结果表明(002)相是ZnO纳米棒的最佳生长方向。XRD及Raman结果都揭示了ZnO的六角铅锌矿结构。PL光谱表明两种衬底生长的ZnO纳米棒均呈现出较强的紫外发射性质,两个紫外发射峰之间的红移是由于晶粒尺寸的大小以及ZnO薄膜中的应力所致。
ZnO nanorods were prepared by pulse laser deposition (PLD) and hydrothermal method on Si and ITO substrates.The prepared ZnO nanorods were characterized by field emission scanning electron microscopy (FE-SEM),X-ray diffraction (XRD),photoluminescence (PL) and raman measurements.Its FE-SEM image shown that the ZnO nanorods growing on the Si substrate had a higher density and verticality.The XRD results shown that the(002) phase was the best growth direction of the ZnO nanorods.Both XRD and raman measurements revealed the hexagonal wurtzite structure of ZnO.The PL spectra showed strong ultraviolet (UV) emissions of ZnO NRs and a small shift.This shift was attributed to a big mean size of crystallites and a tensile stress in the ZnO NRs films.
[1] Yang J H,Lang J H,Li C S,et al.Effects of substrate on morphologies and photoluminescence properties of ZnO nanorods[J].Applied Surface Science,2008,255(5):2500-2503.
[2] Wang X,Summers C J,Wang Z L.Large-scale hexagonal-patterned growth of aligned ZnO nanorods for nano-optoelectronics and nanosensor arrays[J].Nano Letters,2004,4(3):423-426.
[3] Liu J S,Shan C X,Shen H,et al.ZnO light-emitting devices with a lifetime of 6.8 hours[J].Applied Physics Letters,2012,101(1):3912.
[4] Li C,Li Y,Wu Y,et al.ZnO field-effect transistors prepared by aqueous solution-growth ZnO crystal thin film[J].Journal of Applied Physics,2007,102(7):076101.
[5] Look D C.Recent advances in ZnO materials and devices[J].Materials Science & Engineering B (Solid-State Materials for,Advanced Technology),2001,80(1-3):383-387.
[6] Zhang Q,Dandeneau C S,Zhou X,et al.ZnO nanostructures for dye-sensitized solar cells[J].Advanced Materials,2010,21(41):4087-4108.
[7] Liu X,Wu X,Cao H,et al.Growth mechanism and properties of ZnO nanorods synthesized by plasma-enhanced chemical vapor deposition[J].Journal of Applied Physics,2004,95(6):3141.
[8] Yatsui T,Lim J,Nakamata T,et al.Low-temperature (～270℃) growth of vertically aligned ZnO nanorods using photoinduced metal organic vapour phase epitaxy[J].Nanotechnology,2007,18(6):65606.
[9] Hejazi S R,Hosseini H R M,Ghamsari M S.The role of reactants and droplet interfaces on nucleation and growth of ZnO nanorods synthesized by vapor-liquid-solid (VLS) mechanism[J].Journal of Alloys & Compounds,2008,455(1):353-357.
[10] Xu N,Cui Y,Hu Z,et al.Photoluminescence and low-threshold lasing of ZnO nanorod arrays[J].Optics Express,2012,20(14):14857.
[11] Gao K,Zhang W,Sun J,et al.Influences of substrate and annealing on the structural and optical properties and photoluminescence of nanocrystalline ZnO films prepared by plasma assisted pulsed laser deposition[J].The Journal of Physical Chemistry C,2009,113(44):19139-19144.
[12] Rajasekaran N,Mohan S.Preparation,corrosion and structural properties of Cu-Ni multilayers from sulphate/citrate bath[J].Corrosion Science,2009,51(9):2139-2143.
[13] Scott J F.UV resonant raman scattering in ZnO[J].Physical Review B,1970,2(4):1209-1211.
[14] Arguello C,Rousseau D,Porto S.First-order raman effect in wurtzite-type crystals[J].Physical Review,1969,181(3):1351-1363.
[15] Gupta V,Bhattacharya P,Yuzuk Y I,et al.Optical phonon modes in ZnO nanorods on Si prepared by pulsed laser deposition[J].Journal of Crystal Growth,2006,287(1):39-43.
[16] Murmu P P,Kennedy J,Ruck B J,et al.Structural and magnetic properties of low-energy Gd implanted ZnO single crystals[J].Nuclear Instruments & Methods in Physics Research,Section B (Beam Interactions with Materials and Atoms),2012,272(none):100-103.
[17] Yang L L,Yang J H,Wang D D,et al.Photoluminescence and Raman analysis of ZnO nanowires deposited on Si(100) via vapor-liquid-solid process[J].Physica E Low-dimensional Systems and Nanostructures,2008,40(4):920-923.
[18] Ahmed F,Kumar S,Arshi N,et al.Defect induced room temperature ferromagnetism in well-aligned ZnO nanorods grown on Si (100) substrate[J].Thin Solid Films,2011,519(23):8199-8202.
[19] Meng X Q,Zhao D X,Zhang J Y,et al.Photoluminescence properties of single crystalline ZnO/CdS core/shell one-dimensional nanostructures[J].Materials Letters,2007,61(16):3535-3538.
[20] Cao B,Cai W,Zeng H.Temperature-dependent shifts of three emission bands for ZnO nanoneedle arrays[J].Applied Physics Letters,2006,88(16):423.
[21] Bi D,Wu F,Yue W,et al.Device performance correlated with structural properties of vertically aligned nanorod arrays in polymer/ZnO solar cells[J].The Journal of Physical Chemistry C,2010,114(32):13846-13852.
基金资助
贵州省科技厅和贵州民族大学联合基金(LKM[2013]17);贵州省教育厅青年科技人才成长项目(黔教合KY字[2017]131)
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