Transparent and Conducting Tin Oxide Thin Films Deposited by Spray Pyrolysis

The chemical spray pyrolysis technique has been one of the major techniques to deposit a wide variety of materials in thin film form, for different applications. The most important control parameters for obtaining good quality thin film are the nature and temperature of the substrate, the composition of the precursor solution, the gas and solution flow rates and the deposition time. The paper presents the morphology, the electrical and optical properties of tin oxide (SnO2) thin films deposited by spray pyrolysis technique onto glass substrates at 400 oC using SnCl2 as precursor and methanol as solvent. The change in the grain shapes and orientation is presented based on SEM data. The minimum sheet resistance of 21.4 Ω/sqr was obtained, being the lowest value reported in the literature for these materials. Optical transmittance in the range of 58-85 % has been obtained for the prepared films

Role of Room Temperature Sputtered High Conductive and High Transparent Indium Zinc Oxide Film Contacts on the Performance of Orange, Green, and Blue Organic Light Emitting Diodes

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Thin-film transistors based on p-type Cu2O thin films produced at room temperature

This work was funded by the Portuguese Science Foundation (FCT-MCTES) through projects PTDC/CTM/73943/2006, PTDC/EEA-ELC/64975/2006, ERC 2008 Advanced Grant (INVISIBLE Contract No. 228144) and IT R&D program of MKE (Contract No. 2006-S079-03, Smart window with transparent electronic devices) from ETRI Korea. We thank K. Nomura for the Seebeck measurements and N. Franco for the XRD analysis.Copper oxide (Cu2 O) thin films were used to produce bottom gate p-type transparent thin-film transistors (TFTs). Cu2 O was deposited by reactive rf magnetron sputtering at room temperature and the films exhibit a polycrystalline structure with a strongest orientation along (111) plane. The TFTs exhibit improved electrical performance such as a field-effect mobility of 3.9 cm2 /V s and an on/off ratio of 2× 102.publishersversionpublishe

Investigation on the Deposition of the Nd doped ZnO Thin film and Their Structural and Optical Properties

Zinc oxide (ZnO) and Neodymium-doped zinc oxide thin films were deposited onto the glasssubstrates at 4000C by the spray pyrolysis method for various doping concentrations ofNeodymium (Nd) in the spray solution. The modification on the structural and opticalproperties for various neodymium incorporation levels was investigated. The growthorientation of the ZnO and Nd doped ZnO thin films were investigated by XRD patterns. Allthe deposited films are polycrystalline in nature and the films exhibit hexagonal wurzitestructure with c-axis orientation along (002) direction. The grain sizes varied from 23-46 nmwith various concentrations of Nd. Morphological studies and composition of the films wereperformed by SEM and EDX analyses, respectively. Formation of ring shaped patterns areobserved on the surface of the Nd doped ZnO thin film. This is confirmed with EDX spectrum.PL spectra showed that Nd doped ZnO thin film exhibit a low density of native defects. Nddoped ZnO thin films were obtained for the same deposition parameters such as spray time,spray interval, compressed air pressure and distance between spray nozzle and substratewere kept constantSelection and Peer-review under responsibility of [Conference CommitteeMembers of Recent Advances In Nano Science and Technology 2015.]

The electronic transport mechanism in indium molybdenum oxide thin films RF sputtered at room temperature

Indium molybdenum oxide (IMO) thin films were radio-frequency (RF) sputtered at room temperature (RT) and studied as a function of base pressure (BP). The crystallinity of the films is decreased with the increase in BP. A maximum mobility (μ) of 49.6 cm2 V−1 s−1 was obtained from the IMO films deposited at RT without any post-annealing treatment. The electronic behaviour of the deposited films was investigated by temperature-dependent (100–550 K) Hall measurements. Study on the scattering mechanisms based on the experimental data and theoretical models show that the ionized scattering centres are dominating. The films possess wide work function (4.91 eV) and high transmittance (> 70%) over visible and near infrared (NIR) range. The obtained results, especially the high work function and NIR transmittance, are very promising particularly in applications such as optical detectors and solar cells

Photoelectrochemical Water Separation and Dye Degradation Catalyzed by g‑C₃N₄/MoS₂ Nanosheets Doped with V²⁺ Metal Ions Coated on TiO₂ Nanorods

Photoelectrochemical (PEC) systems are inefficient, probably due to charge carrier mobility, recombination rate, and solar light absorption. Fabricating semiconductor-metal sulfide nanocomposites and nanostructured materials can improve the absorption of solar radiation, electron–hole separation, transport, and hydrogen (H2) and oxygen generation to resolve the world’s energy dilemma. The vanadium-doped (V) layered graphitic carbon nitride (g-CN)/MoS2 (MS) nanocomposite was synthesized employing two-step solvent evaporation and thermal condensation. This multilayer V-doped g-CN/MS nanocomposite broke down methyl red dye in 60 min under sunlight. Due to visible light absorption, the V-doped g-CN-MS nanostructure degrades the dye by 97.84%. We found that at 3.0 wt % V-doped g-CN/MS coated on TiO2 nanorods. The catalyst nanocomposites displayed a high photocurrent density of 23.72 mA cm–2 and a H2 production rate of 4477 mol h–1 cm–2. Additionally, the microstructure, optical absorption behavior, and electrical conductivity were all shown to contribute to these impressive PEC characteristics. The V-modified g-CN/MS nanocomposite structures are effective and regulated PEC catalysts, and this study suggests ways to improve PEC water splitting and degradation