Optical, electrical and structural properties of nano-pyramidal ZnO films grown on glass substrate by spray pyrolysis technique
作者： A. Bedia , F.Z. Bedia , M. Aillerie , N. Maloufi , S. Ould Saad Hamady
DOI: 10.1016/J.OPTMAT.2014.02.012
关键词:
摘要: Abstract Optical, electrical and structural properties of ZnO nano-pyramidal films, synthesized by chemical spray pyrolysis technique on glass substrates were investigated. A complete set structural, optical parameters is proposed in this contribution. films possess polycrystalline wurtzite structure showing a preferential orientation along the c-axis as confirmed XRD measurements. The has been investigated using Raman spectroscopy, at 532 nm excitation source morphology characterized scanning electron microscopy (SEM). Link to specific growing parameters, so-obtained rarely observed nanostructures family with diameter hexagonal nano-pyramids range 50–150 nm smaller than usually obtained pyrolysis. strong peaks E2 mode 99.3 cm−1 (low) 439.4 cm−1 (high), indicate good crystal quality nano-pyramids. existence compressive stress was pointed out scattering estimated High transmittance value film above 90% visible region band gap found be 3.273 eV room temperature. photoluminescence (PL) spectrum pyramid shows an intensity ratio UV emission more 20. By characterizations we values resistivity Hall mobility equal 17 Ω cm 8.49 cm2 V−1 s−1, respectively.
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