Buffer-enhanced room-temperature growth and characterization of epitaxial ZnO thin films

Sasaki, Atsushi; Hara, Wakana; Matsuda, Akifumi; Tateda, Norihiro; Otaka, Sei; Akiba, Shusaku; Saito, Keisuke; Yodo, Tokuo; Yoshimoto, Mamoru
June 2005
Applied Physics Letters;6/6/2005, Vol. 86 Issue 23, p231911
Academic Journal
The room-temperature epitaxial growth of ZnO thin films on NiO buffered sapphire (0001) substrate was achieved by using the laser molecular-beam-epitaxy method. The obtained ZnO films had the ultrasmooth surface reflecting the nanostepped structure of the sapphire substrate. The crystal structure at the surface was investigated in situ by means of coaxial impact-collision ion scattering spectroscopy. It was proved that the buffer-enhanced epitaxial ZnO thin films grown at room temperature had +c polarity, while the polarity of high-temperature grown ZnO thin films on the sapphire was -c. Photoluminescence spectra at room temperature were measured for the epitaxial ZnO films, showing only the strong ultraviolet emission near 380 nm.


Related Articles

  • Growth condition dependence of morphology and electric properties of ZnO films on sapphire substrates prepared by molecular beam epitaxy. Ohgaki, Takeshi; Ohashi, Naoki; Kakemoto, Hirofumi; Wada, Satoshi; Adachi, Yutaka; Haneda, Hajime; Tsurumi, Takaaki // Journal of Applied Physics;2/15/2003, Vol. 93 Issue 4, p1961 

    Zinc oxide (ZnO) films were grown on sapphire (11&2macr;0) substrates by molecular beam epitaxy under oxygen radical irradiation. The effect of the growth conditions, including the Zn/O ratio supplied to the film surface, on the electrical properties of ZnO films was studied in relation to the...

  • Fast, high-efficiency, and homogeneous room-temperature cathodoluminescence of ZnO scintillator thin films on sapphire. Lorenz, M.; Johne, R.; Nobis, T.; Hochmuth, H.; Lenzner, J.; Grundmann, M.; Schenk, H. P. D.; Borenstain, S. I.; Schön, A.; Bekeny, C.; Voss, T.; Gutowski, J. // Applied Physics Letters;12/11/2006, Vol. 89 Issue 24, p243510 

    Excitonic luminescence in ZnO exhibits subnanosecond lifetimes combined with high efficiency, which makes epitaxial ZnO a promising ultrafast scintillator material for envisaged imaging applications with high data rate. ZnO thin films on sapphire show external ultraviolet electron-photon...

  • Photoluminescence dependence of ZnO films grown on Si(100) by radio-frequency magnetron sputtering on the growth ambient. Jeong, Sang-Hun; Kim, Bong-Soo; Lee, Byung-Teak // Applied Physics Letters;4/21/2003, Vol. 82 Issue 16, p2625 

    We report the effects of the growth ambient on photoluminescence (PL) emission properties of ZnO films grown on Si (100) by rf magnetron sputtering. Upon increasing the O[SUB2] /Ar + O[SUB2] ratio in the growing ambient, the visible emission in the room-temperature PL spectra was drastically...

  • Production of high-quality ZnO films by the two-step annealing method. Ye, J. D.; Gu, S. L.; Zhu, S. M.; Qin, F.; Liu, S. M.; Liu, W.; Zhou, X.; Hu, L. Q.; Zhang, R.; Shi, Y.; Zheng, Y. D. // Journal of Applied Physics;11/1/2004, Vol. 96 Issue 9, p5308 

    In this study, a two-step annealing method is advanced to produce high-quality ZnO films with excellent structural, electrical, and optical properties. The effects of oxygen and nitrogen annealing on the properties of undoped ZnO films are reversible to each other and are attributed to the...

  • Growth of ZnO nanorods by a simple chemical method. Boukos, N.; Chandrinou, C.; Giannakopoulos, K.; Pistolis, G.; Travlos, A. // Applied Physics A: Materials Science & Processing;Jul2007, Vol. 88 Issue 1, p35 

    ZnO nanorods were grown by a near-room-temperature, simple, chemical solution method on large-area Zn foils and substrate materials such as silicon, and zinc oxide thin films on silicon and glass. Study of the ZnO nanorods on the different substrates by electron microscopy methods shows that the...

  • Effect of Laser Power on Photoluminescence and Transmittance Properties of Pulsed Laser Deposited Zinc Oxide Thin Films. Mallick, Arindam; Basak, Durga // AIP Conference Proceedings;2015, Vol. 1665, p1 

    The effect of different laser power on the structural, photoluminescence and transmittance properties of ZnO films grown using pulsed laser deposition technique has been described. It is observed that laser power influences the photoluminescence properties as the crystallinity of the transparent...

  • Transparent c-axis Oriented Photoluminescent ZnO:Ga Films Grown by Low Temperature Magnetron Sputtering. Mondal, Praloy; Das, Debajyoti // AIP Conference Proceedings;2015, Vol. 1665, p1 

    ZnO:Ga thin films have been prepared by rf magnetron sputtering, varying the substrate temperature, at a very low rf power (50 W). Films have been characterized by optical, electrical, structural and chemical analysis. The ZnO:Ga film prepared at close to ambient temperature (~50 °C)...

  • Epitaxial relationship of ZnO film with Si (001) substrate and its effect on growth and morphology. Liu, Z. W.; Sun, C. W.; Gu, J. F.; Zhang, Q. Y. // Applied Physics Letters;6/19/2006, Vol. 88 Issue 25, p251911 

    Using reactive radio-frequency magnetron sputtering, epitaxial growth of ZnO film was observed on Si (001) substrate at different temperatures ranging from room temperature to 750 °C. The epitaxial relationship was determined to be ZnO(001)∥Si(001) in the direction normal to the surface...

  • Emission from the higher-order excitons in ZnO films grown by laser molecular-beam epitaxy. Tsukazaki, A.; Ohtomo, A.; Kawasaki, M.; Makino, T.; Chia, C.H.; Segawa, Y.; Koinuma, H. // Applied Physics Letters;5/10/2004, Vol. 84 Issue 19, p3858 

    Epitaxial ZnO thin films were grown by laser molecular-beam epitaxy on lattice-matched ScAlMgO4 substrates following the deposition and annealing of suitable buffer layers. The samples were characterized by low-temperature photoluminescence (PL), absorption, and reflectivity measurements. PL...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics