Papers by Keyword: Thin Film

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Authors: V.G. Myagkov, O.A. Bayukov, V.S. Zhigalov, L.E. Bykova, N.A. Drozdova, G.N. Bondarenko
Abstract: We have observed the formation of a thin buffer layer on the Fe/Cu interface at a temperature of 520 K. Mössbauer spectroscopy and magnetic studies reveal that the residual gases in the chamber (especially oxygen) play an important role in the ultra-thin interlayer formation. It was shown that the Cu2O buffer layer does not change the Pitsh orientation relationships during epitaxial growth of α-Fe (110) on Cu (001). Our analysis of the experimental results contradicts pseudomorphic growth and formation of γ-Fe on Cu (001).
Authors: Fatin Hana Naning, S. Malik, Zanuldin Ahmad
Abstract: Cadmium sulfide (CdS) were synthesised directly in the active layer of solar cell by mixing regioregular poly (3-hexylthiophene-2,5-diyl) or P3HT with stearic acid, and exposed to hydrogen sulfide gas. The exposure times to hydrogen sulfide gas were varied and the isotherm of P3HT:Stearic acid obtained show that the presence of cadmium ions in the subphase changes the gas-liquid-solid transformation profile. UV-Vis-NIR results indicated that exposure to hydrogen sulfide gas created CdS particles resulting in wider absorption spectra. The exposed P3HT:SA active layer exhibit high resistance that affects short circuit current density and open circuit voltage of the solar cells device. Keywords: CdS, P3HT, Thin Film, Angle Lifting Deposition, Solar Cells
Authors: Kornkanok Ubonchonlakate, Lek Sikong, Tienchai Tontai, Fumio Saito
Abstract: The photocatalytic Ag and Ni doped TiO2 films were prepared by sol-gel method and coated on glass fiber roving. The films were calcined at 500 °C for 1 hour with a heating rate of 10°C/min. The surface morphology and properties of synthesized TiO2 films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR) and UV-vis diffuse reflectance spectroscopy (DRS). The results show that TiO2-1Ag and TiO2-1Ag-1Ni films give rapidly kill P.aeruginosa bacteria under UV irradiation and TiO2-1Ni films give well kill P.aeruginosa bacteria under visible light.
Authors: P.S. Pa
Abstract: A bluge rotational tool has been developed as an effective precision electrochemical removal for the thin film nanostructures from LCD panels. This ultra-precise process effectively removes defective Indium-Tin-Oxide layers allowing LCD panels to be returned to the production line and significantly reduces costs. In the current experiment a 7th Generation TFT-LCD panel was used. A high rotational speed of the cheek rotational tool elevates discharge mobility and improves the removal effect. A negative electrode of large diameter with a small end radius provides higher current density and also improves the removal affect. Pulsed direct current can improve the effect of dregs discharge and is advantageous when combined with a higher electric power. A fast feed combined with a high current flow results in very effective removal of the color filter layer. This novel design using electrochemical removal as a precision recycling process for removing ITO layers from LCD panels is clean, effective and very fast.
Authors: Chandasree Das, G. Mohan Rao, S. Asokan
Abstract: This work describes the electrical switching behavior of three telluride based amorphous chalcogenide thin film samples, Al-Te, Ge-Se-Te and Ge-Te-Si. These amorphous thin films are made using bulk glassy ingots, prepared by conventional melt quenching technique, using flash evaporation technique; while Al-Te sample has been coated in coplanar electrode geometry, Ge-Se-Te and Ge-Te-Si samples have been deposited with sandwich electrodes. It is observed that all the three samples studied, exhibit memory switching behavior in thin film form, with Ge-Te-Si sample exhibiting a faster switching characteristic. The difference seen in the switching voltages of the three samples studied has been understood on the basis of difference in device geometry and thickness. Scanning electron microscopic image of switched region of a representative Ge15Te81Si4 sample shows a structural change and formation of crystallites in the electrode region, which is responsible for making a conducting channel between the two electrodes during switching.
Authors: Irina A. Shikhman, Marina G. Shelyapina, Galina S. Kupriyanova
Abstract: Magnetite is a very promising candidate for hard electrode in magnetic tunnel junction devices due to its electronic and magnetic properties. Addition of a buffer iron layer improves required properties. Here we report on the results of our DFT study of the impact of the additional Fe buffer layer on the electronic and magnetic properties of magnetite.
Authors: P.S. Pa
Abstract: The low yield rate in display panel production that results from imperfect Indium Tin Oxide layer deposition is well known. In this experiment a 6th Generation TFT-LCD is used to investigate an ultra-precise method for the removal of Indium Tin Oxide (ITO) thin film microstructure from defective display panels. The complete removal of the ITO layer makes it possible to put these panels back into the production line for reuse with a considerable reduction of both waste and production cost. This process, which involves the removal of ITO layer substructure by means of an electro-chemical etching process, is of major interest to the optoelectronics semiconductor industry. The ITO film can be removed completely by a proper combination of feed rate and electric power. In this electro machining process a high current flow and high feed rate of the display (color filter) achieves complete and efficient removal of the ITO layer. A large diameter cathode virtual rotation circle also corresponds to a higher removal rate. A small cathode end radius effectively improves dregs discharge and is an advantage when associated with a high workpiece feed rate. This precision reuse process for the recycling of defective display screen color filters is presented as an effective tool for use in the screen manufacturing process. The defective Indium Tin Oxide thin-film can be removed easily and cleanly in a short time.
Authors: A. Hartmaier, Markus J. Buehler, Hang Gao
Authors: Chien Chong Chen, Chun Jui Li, Ke An Lin, Tun Hao Hsu, Shu Heng Wang
Abstract: A green process to prepare the hydrophobic and transparent CNT-based surface was developed without using any toxic chemicals, solvents or gases. CNT brush (CNT-b) powder, which was prepared by the repeated CVD, was the main material to prepare the desired surface. An adhesive layer of ethyl cellulose (EC) was spin coated on the glass substrate, where EC formed a networked porous microstructure. A low concentration CNT-b suspension was obtained by sonication of the mixture of CNT-b powders, sodium dodecylbenzenesulfonate (SDBS) and deionized water. To obtain the stabilized CNT-b suspension, it was found that 40 min of sonication time and SDBS/CNT-b weight ratio being 0.1 were required. The target surface was then prepared by spin coating CNT-b suspension on the EC coated glass. The contact angle of the prepared surface was around 120o and the optical transmittance was around 93% for the visible light. Either increasing the number of spin coatings or increasing the concentration of CNT-b suspension could slightly increase the contact angle to around 130o but the optical transmittance significantly reduce to about 75%, leading to a semi-transparent sample.
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