Conveners
A5: Nanoscale and Surface
- Anurat Wisitsoraat
Abstract
The research in organic-inorganic halide perovskite solar cells (PSCs) is taking an upward trend. This is due to their excellent photovoltaic efficiency which is exceeding 22%, ease of processability and low cost. In order to meet the energy demand of the world using this technology, the stability and efficiency of PSCs need to be enhanced. This can be achieved by using...
Surface modification of titanium dioxide (TiO$_2$) substrates was performed to enhance efficiency of perovskite solar cells efficiency by inserting small organic molecules between TiO$_2$ electron transporting layer and CH$_3$NH$_3$PbI$_3$ perovskite layer. TiO$_2$ substrates were immersed into a solution of amino propionic acid (APA) or amino benzoic acid (ABA) in order to tune up and improve...
CuIn$_{1-x}$Ga$_{x}$Se$_{2}$ (112-CIGS) has been proposed as a material for high efficiency thin film solar cells with reliably applicable photovoltaic properties. Higher efficiency devices can be achieved by various surface treatments and are believed to have Cu deficiency at the surface. One of the possible techniques is to have a very thin Cu-depleted surface, e.g....
In this study, effects of low-temperature annealing on properties of tin-doped zinc oxide (TZO) thin were investigated. TZO film prepared by a sol−gel method is employed as an electron transport material in perovskite solar cells. After Sn doping, optical properties of the thin films changes. Different temperature annealing affects also surface morphology of the films. Since surface morphology...
One of a few disadvantage properties of polymethylsiloxane (PDMS) is its hydrophobicity which can hinder its fluidic applications. Oxygen plasma treatment on PDMS surfaces is a conventional method in rendering them hydrophilic, however hydrophobicity returns within days after treatment. This study proposes oxygen ion implantation at the micrometer scale inside PDMS structures to ensure lasting...
The effects of annealing temperature on the structural and electrical properties of tin dioxide ($SnO_2$) thin films were systematically studied for a gas sensing application. Tin dioxide thin films with different number of layers and annealing temperature were prepared on indium tin oxide substrates by sol-gel dip-coating technique. SEM micrographs show that the approximately grain size of...
Nano-silica aerogels were synthesized from sodium silicate which is obtained from the reaction of bagasse ash and NaOH. Silanes and salazane was employed to control the formation and structure of silica aerogels in this study. To initiate the modification of silica aerogel properties, 1.0 M NH4OH solution was utilized. The silica aerogel resulted from the reaction was dried under ambient...
Cu-doped BiFeO$_3$ thin films were fabricated by spin coating method. The thin films were deposited on Pt/Si-N type substrate. X-rays diffraction were used to reveal purity and impurity of Cu-doped BiFeO$_3$ thin films crystalline structure on Cu-doping concentration as 0, 0.1, 0.2, 0.5 and 1.0, respectively. X-ray absorption spectroscopy (XAS) were used to investigate Fe and Cu elements...
