Indium tin oxide (ITO) thin films on soda-lime-silicate (SLS) and silica glasses were fabricated using an RF plasma mist deposition process. SEM analysis showed that the ITO films consisted of uniform particle size with a size ranging from 50 to 200 nm. XRD revealed that 1n203 phase is present in the film when In : Sn ratio is 5 : 5 and higher. The resistivity of the ITO films was between 1-10 ohm-cm. The structural change near the surface of the glass was investigated by DRIFT (Diffuse reflectance infrared Fourier transform) spectroscopy. The infrared results indicated that the structure near the surface was significantly changed with higher indium concentration. The coating materials create non-bridging oxygen near the surfaces. The effects of deposition time and substrate temperature were also studied.
There exists several techniques to synthesize TlBaCaCuO from precursor films.Recently, a two zone furnace technique was developed by DeLuca.' Based on our experience on the two zone furnace technique, we systematically conducted a series of experiments in a tube furnace with a temperature gradient distribution. The BaCaCuO precursor films were fabricated by an ink method, and the TI diffusion source was T1203. Superconductive films were characterized by SQUID magnetization measurement, X-ray diffraction, SEM, and EDS.Experimental results will be summarized.
A continuous wave (CW) Nd:YAG laser operating at the fundamental mode of 1.064pm was used to deposit CdS thin films with cubic phase on glass, quartz, NaC1 (100), and carbon coated formvar substrates. At substrate temperatures near 200°C, the films consisted of a combination of the zincblende (cubic) and wurtzite (hexagonal) phases of CdS. X-ray diffraction patterns of films deposited on each substrate indicate a predominantly cubic structure. Transmission electron microscopy further confirmed the presence of the cubic phase. The films had a stoichiometric ratio of 1:1 for Cd:S. The surface of the films were optically smooth. Optical transmission measurements reveal a room temperature absorption edge of 515 nm for the films deposited on glass and quartz substrates. Raman spectra show longitudinal optical (LO) modes at 300 cm1 (1LO) and 605 cm1 (2L0), similar to that of the hexagonal film. The transition from predominantly cubic to hexagonal films was estimated to occur near 275°C for glass substrates, and 350°C for quartz substrates.
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