Our Research Fields
In our work, many types of nano-structured materials have been studying for electrical applications such as photovoltaic cells, supercapacitor, transister, and so on. So, here we do research to improve electrical properties for optimizing excellent devices. If there is a growing interest in solar cells, battery, or sensitizer, please click the "More papers" button below to get detailed information.
The development of functionalized surfaces is one of the most investigated topics in chemical, biological and materials sciences. In particular, large area surface modification techniques such as self-assembly, the Langmuir–Blodgett method and layer-by-layer assembly using organic compounds compared to expensive inorganic counterparts have been extensively developed over the past few decades.
The unique characteristics of nanomaterials have consistently required developments in the surface stabilization of the individual NPs with organic molecules. However, organic stabilizers could hinder most active surface sites of the metal NPs to block their catalytic functions. Immobilizations of the metal NPs on desired solid supports such as metal oxides, graphitic carbons, and porous silica prevent agglomeration of the metal NPs, which has led to the poisoning of catalytic activities. Metal NPs on supports function in repeated recycles without organic stabilizers, maintaining high performance as heterogeneous catalysts.
Recently, electrochemical supercapacitors (ES) have received attention as a promising next-generation energy storage system because they show higher power densities and larger cycle stability than secondary batteries and show higher energy storage than dielectric capacitors. However, the low energy density and the high production cost of ES materials hinder their practical application. Some representative oxide ES materials that utilize faradaic reactions, such as RuO2, MnO2, Co3O4, and Co(OH)2, have been studied in order to achieve higher energy densities. These energy densities show 10 to 100 times larger capacitance values than electrical double-layer supercapacitors (EDLSs), such as carbon and other materials, based on their surface charge accumulation. Among these, cobalt hydroxide (Co(OH)2) is inexpensive, can be easily prepared, involves a layered crystal structure that allows fast guest ion insertion/desertion reactions because of its large interlayer space, and has the capability for ionic conductivity.
Solar energy is the most famous infinite alternative energy source. However, conventional solar cells can’t be commercialized in real life because they are expensive and have low efficiency in comparison with petroleum energy. For these reasons, there are many research around the world to focus on boosting solar cell conversion efficiencies, lowering the cost of solar cells, modules, and systems, and improving the reliability of PV components and systems.
We investigate a non-vacuum route for large-scale and low-cost fabrications of CuInSe2 thin films by employing a various method. Non-vacuum technologies have emerged as potentially attractive alternative approaches for chalcopyrite-based absorber layer deposition since they use relatively low cost equipment and provide a high throughput, a compositional uniformity over large area, and a high material utilization.