Synthesis and optical properties of Co and Zn-based metal oxide nanoparticle thin films
Acta Physica Polonica A
Polish Academy of Sciences
500 - 503
Item Usage Stats
MetadataShow full item record
ZnO, Co doped ZnO (ZnO:Co) and CoO thin films were deposited on glass substrates by using the spark discharge technique with Zn-Zn, Zn-Co and Co-Co metal electrodes (tips). The structural and optical properties of the films were characterized by X-ray diffraction, scanning electron microscopy measurements and UV-Vis spectrometry. Cubic phase reflection of CoO (200) was observed in the samples containing Co. The size of nanoparticles had varied between 38 nm and 200 nm in ZnO thin films. When Co electrode was used, spherical structure had deteriorated and clusters of particles, with smaller radii, were observed. In addition, when Co-Co electrode pairs were used, various cavities with different sizes were formed. Especially, it was observed that the optical transmittance had generally increased with the decreasing spark (charge) voltage, while increasing with the number of sparks. The Co-containing samples were green in color and it was observed that the loss of transmission appears in a specific region in the Co-doped ZnO thin films due to characteristic d-d transition of Co2+ ions. The thickness of the films had decreased with the increasing number of sparks. In addition, the band gap energy, Eg, evaluated by UV-Vis spectroscopy measurements has been shifted to higher wavelengths (red shift) for the ZnO:Co thin films.
Scanning electron microscopy
Ultraviolet visible spectroscopy
X ray diffraction
Metal oxide nanoparticles
Structural and optical properties
Thickness of the film
Published Version (Please cite this version)http://dx.doi.org/10.12693/APhysPolA.131.500
Showing items related by title, author, creator and subject.
Large area compatible broadband superabsorber surfaces in the VIS-NIR spectrum utilizing metal-insulator-metal stack and plasmonic nanoparticles Dereshgi, S. A.; Okyay, A. K. (OSA - The Optical Society, 2016)Plasmonically enhanced absorbing structures have been emerging as strong candidates for photovoltaic (PV) devices. We investigate metal-insulator-metal (MIM) structures that are suitable for tuning spectral absorption ...
Garifullin, R.; Eren, H.; Ulusoy, T. G.; Okyay, A., K.; Biyikli, N.; Guler, M. O. (Wiley - V C H Verlag GmbH & Co. KGaA, 2016)Here peptide amphiphile (PA) nanofiber network is exploited as a three‐dimensional soft template to construct anatase TiO2 and wurtzite ZnO nanonetworks. Atomic layer deposition (ALD) technique is used to coat the organic ...
Onbasli, M.C.; Okyay, A., K. (SPIE, 2010)State-of-the-art copper interconnects suffer from increasing spatial power dissipation due to chip downscaling and RC delays reducing operation bandwidth. Wide bandwidth, minimized Ohmic loss, deep sub-wavelength confinement ...