Premium
Structural and optical properties of zinc oxide films deposited by wire explosion technique
Author(s) -
Snitka Valentinas,
Jankauskas Vytenis,
Žunda Audrius,
Mizariene Vida,
Seniunas Gediminas
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200675152
Subject(s) - materials science , photoluminescence , wurtzite crystal structure , crystallite , scanning electron microscope , thin film , analytical chemistry (journal) , zinc , luminescence , nanotechnology , composite material , optoelectronics , metallurgy , chemistry , chromatography
Nanostructured ZnO films were deposited on glass, quartz and Al on silicon mono‐crystal Si (100) substrates by using the wire explosion technique. The growth process, structure and photoluminescence (PL) properties were studied by X‐ray diffraction (XRD), UV–VIS spectroscopy, scanning electron (SEM) and atomic force microscopy (AFM) and photoluminescence measurements. X‐ray diffraction measurements have shown that ZnO films are composed of (100), (002), (101) orientation crystallites. The post‐deposition thermal treatment at 600 °C temperature in air has shown that the composite of Zn/ZnO film was fully oxidized to ZnO film. XRD spectra of the film deposited in oxygen atmosphere at room temperature presents high intensity dominating peak at 2 θ = 36.32° corresponding to the (101) ZnO diffraction peak. The small fraction of the film (7%) correspond to (002) peak intensity at 2 θ = 34.42°. This result indicates the good crystal quality of the film and hexagonal wurtzite‐type structure deposited by zinc wire explosion. The SEM analysis shows that ZnO films presented different morphologies from fractal network to porous films depending on deposition conditions. AFM analysis revealed the grain size range from 50 to 500 nm. The deposited in air films have shown the weak PL peak at ∼373 nm and a strong green luminescence band. The films deposited in oxygen atmosphere demonstrate increased UV band PL intensity and decreased intensity of green PL band. The obtained PL spectra are similar to powder ZnO and it correlates with the size of ZnO nanoparticles (10–30 nm) measured by AFM. These results demonstrated that the wire explosion technique is a feasible method to produce high‐quality ZnO nanocrystalline thin films and quantum dots. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)