Abstract
The photovoltaic properties of TiO2/ZrO2 double electron transport layered perovskite solar cells were investigated based on the ZrO2 layer thickness. Samples were fabricated with a glass/FTO/TiO2/ZrO2/ perovskite structure. The TiO2/ZrO2 layer thickness ratio was confirmed to be 264/0, 228/168, 288/204, 270/242, and 282/288 nm, respectively, using an electron probe microanalyzer.... More

Abstract
Formation nano-/micro- patterns with high quality is one of the most important factors for the nanofabrication of high density electronic devices. However, there are remaining challenges to be resolved such as a low quality roughness, low pattern resolution, and complex process. In this study, we suggest a novel and simple... More

Abstract
In this study, we investigated the effect of the morphological, crystal structural, electronic structural, and electrocatalytic properties of inverse spinel structured copper cobalt oxide (Cu0.72Co2.28O4) catalysts. The materials were prepared by coprecipitation using various copper and cobalt precursors, and subsequent oxidation treatment. Electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and... More

Abstract
Using electroplating to produce copper foil has many economic advantages. In addition, the easiest way to manufacture electroplated copper foil with various properties is to add appropriate additives. This study evaluated the surface properties, mechanical and electrical properties of copper foil electroplated in electrolytes containing the leveler JGB (Janus Green... More

Abstract
Studies of effective furnace cooling technology and refractory materials have extended the lifetime of a blast furnace to more than 15 years. On the other hand, the replacement of refractories in the blast furnace incurs considerable cost and time loss due to the problem of stopping the blast furnace operation.... More

Abstract
Laser surface heat treatment and laser nitriding processes were applied using selective surface modification techniques to investigate phase transformation, microstructural evolution, and surface hardening behaviors for two types of plastic injection mold steels, AISI 1045 and P21. During laser surface heat treatment, a 245% hardness increase compared to that of... More

Abstract
The effect of heat treatment conditions on the mechanical properties and energy absorption capacity of 7003 (Al-6Zn-0.6Mg) aluminum alloy was studied. The extruded material was heat treated at various temperatures to prepare annealed or aged specimens. Tensile tests, hardness measurements, electron backscatter diffraction characterization, differential scanning calorimeter analyses were carried out... More