ITO 투명 전극 필름은 디스플레이, 전기 자동차 등 산업 전 범위에서 널리 사용되는 전자 재료이다. 본 연구에서는 이러한 indium tin oxide (ITO) 필름의 열성형 안정성을 향상시키기 위하여 Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) 전도성 고분자 코팅 용액 조성을 결정하였다. 1000 S/cm의 고 전도성을 보이는 PEDOT:PSS 용액에 끓는점이 각기 다른 4가지 종류의 용매를 희석하였고, 코팅 전 후 면저항 변화를 분석하였다. 또한 380~800 nm 영역의 광 투과율 분 석 및 Raman 스펙트럼 분석을 통하여 PEDOT:PSS 박막이 코팅된 ITO 투명 전극의 전기적 특성 결정 메커니즘을 규명하였 다. 230°C 열성형 공정 결과 ITO 필름은 113% 연신 상태에서 이미 전기 전도성을 읽었지만, ethylene glycol을 희석 용매로 사용하여 얻어진 전도성 고분자 박막이 적용된 ITO 필름은 126% 고 연신 상태에서도 초기 60 Ω/sq 면저항을 246 Ω/sq로 유지하는 우수한 전기 전도성을 보였다.

This study conducted in-depth interviews with experts to implement Hanbok shows on metaverse, which can contribute to the succession and development of Hanbok design and to establish a platform that fits the reality of the Hanbok industry and consumers. In-depth interviews were conducted to collect opinions from experts, and the derived contents were divided and analyzed using an affinity diagram. Experts were positive about the use of the metaverse platform of the Hanbok show in terms of impact, accessibility, exposure, virtual fitting, issuance of NFTs, and promotion of Hanbok brands. As a result of verifying the validity of the four components of metaverse, experts highly evaluated the possibility of using Hanbok shows in the order of virtual reality, augmented reality, mirror world, and lifelogging. Visuality, influence, marketing efficiency in virtual reality, immersion in augmented reality, fantasy and artistic elements, expression, diversity, and abundant experiences were expected. The platform’s requirements emphasized realistic implementation equipment and technology, collaboration between Hanbok designers and producers, in addition to government support. Results of this study showed that appropriate target was analyzed to be in the 10–30s, and the appropriate price range was found to be able to sell at a discount of 40–80% compared to offline. This study provides useful implications for the service development of metaverse content, which will also be actively used in the Hanbok field, and can be used as basic data for reviving the Korean Hanbok industry and strengthening international competitiveness.

The inclusion of conductive carbon materials into lithium-ion batteries (LIBs) is essential for constructing an electrical network of electrodes. Considering the demand for cells in electric vehicles (e.g., higher energy density and lower cell cost), the replacement of the currently used carbon black with carbon nanotubes (CNTs) seems inevitable. This review discusses how CNTs can contribute to the development of advanced LIBs for EVs. First, the reason for choosing CNTs as a conducting agent for the cathode is discussed in terms of energy density. Second, the reinforcing effect of CNTs on the anode is described with respect to the choice of silicon as the active material. Third, the development of water-based cathode fabrication as well as dry electrode fabrication with aid of CNTs is discussed. Fourth, three technical hurdles, that is, the price, dispersion issue, and entrapped metal impurities, for widespread use of CNTs in LIBs are discussed.

Metals had been significantly substituted by synthetic polymers in most of our daily requirements, thus relaxing our life. Out of many applied areas, synthetic polymers especially conducting polymers had shown their marked effect and potential. Batteries, pseudocapacitors, superconductors, etc. are the potential zones where conducting polymers are chiefly employed owing to their appreciable conductivity, cost efficiency, and corrosion inhibition nature. Apart from energy storage devices, these conducting polymers find their potential application in biosensors, lasers, corrosion inhibitors, electrostatic materials, conducting adhesives, electromagnetic interference shielding, and others. These all applications including energy storage are due to astonishing properties like high conductivity, flexibility, tuneability, easy processibility, chemical, thermal and mechanical stability, easy and enhanced charge transportation, lightweight, etc. Conducting polymers are extensively studied for their application in energy storage batteries, for which the material under investigation needs to be electrically conductive. However, the conducting nature of these specific conducting polymers is dependent on numerous factors. This review discussed the effect of certain potential factors such as polymerization techniques temperature, doping, bandgap, extended conjugation, solvent, etc. on the electrical/electrochemical conductivity of these conducting polymers. These all factors with their specific variations are found to have a noticeable consequence on the electrical conductivity of the investigated conducting polymer and hence on the energy storage carried by them. This review could be proved beneficial to the readers, who can judiciously implement the conclusions to their research related to conducting polymers and their composites for generating highly efficient energy storage systems.

Research ethics is a desirable way of conducting responsible research, which means maintaining the integrity and complying with ethical norms in a particular field of research. Research integrity means keeping the values and standards required by researchers in the research process. Despite educational institutions' efforts to improve research ethics, the judgment of research cheating is on the rise. In addition, there were unclear regulations related to self-plagiarism, duplicate publication, and the scope of research ethics. If you are a researcher of human research, planning and conducting ethical research is the first step for research integrity. Researchers need to understand protecting research subjects conducting research, and educational institutions should review and improve the current curriculum to provide research ethics education more effectively. Before strengthening legal sanctions on research cheating centered on results, the government should seek solutions through fundamental cause analysis to prevent researchers from committing research cheating. Given the current status of research ethics educational institutions and the progress of policies so far, we hope that if everyone tries at the individual, educational institution, and government levels, we will move in a more positive direction.

지속적인 화석연료의 과도한 소비는 지구온난화와 기후환경 위기를 초래하고 있다. 이에 따라 화석연료의 대체 에너지 중 수소에너지가 주목받고 있는데, 수소에너지는 공해물질의 배출이 없고 자원적인 제약이 없다는 장점이 있다. 이에 따라 물의 전기분해를 이용하여 수소를 생산하는 수전해 시스템 및 수소에너지를 연료로 사용하여 전기를 생산하는 연료전 지 시스템과 관련된 다양한 연구가 진행되고 있다. 본 연구에서는 수전해 시스템과 연료전지의 핵심 소재 중 하나인 음이온 전도성 이오노머 소재를 대상으로 과량의 수화 상태를 반영하여 3D 이오노머 모델을 제작하였다. 최종적으로 과량의 수화상 태에서 이오노머의 구조적인 안정성과 성능 분석을 통해, 수전해 시스템과 연료전지의 핵심 소재인 음이온 전도성 이오노머 설계에 있어서 성능향상 인자를 제시하고자 하였다.

Recent advances in technology using ultra-thin noble metal film in oxide/metal/oxide structures have attracted attention because this material is a promising alternative to meet the needs of transparent conduction electrodes (TCE). AZO/ Ag/AZO multilayer films are prepared by magnetron sputtering for Cu2ZnSn(S,Se)4 (CZTSSe) of kesterite solar cells. It is shown that the electrical and optical properties of the AZO/Ag/AZO multilayer films can be improved by the very low resistivity and surface plasmon effects due to the deposition of different thicknesses of Ag layer between oxide layers fixed at AZO 30 nm. The AZO/Ag/AZO multilayer films of Ag 15 nm show high mobility of 26.4 cm2/Vs and low resistivity and sheet resistance of 3.58*10−5 Ωcm and 5.0 Ω/sq. Also, the AZO/Ag (15 nm)/AZO multilayer film shows relatively high transmittance of more than 65% in the visible region. Through this, we fabricated CZTSSe thin film solar cells with 7.51% efficiency by improving the short-circuit current density and fill factor to 27.7 mV/cm2 and 62 %, respectively.

Silver nanowire (AgNW) networks have been adopted as a front electrode in Cu(In,Ga)Se2 (CIGS) thin film solar cells due to their low cost and compatibility with the solution process. When an AgNW network is applied to a CIGS thin film solar cell, reflection loss can increase because the CdS layer, with a relatively high refractive index (n ~ 2.5 at 550 nm), is exposed to air. To resolve the issue, we apply solution-processed ZnO nanorods to the AgNW network as an anti-reflective coating. To obtain high performance of the optical and electrical properties of the ZnO nanorod and AgNW network composite, we optimize the process parameters – the spin coating of AgNWs and the concentration of zinc nitrate and hexamethylene tetramine (HMT – to fabricate ZnO nanorods. We verify that 10 mM of zinc nitrate and HMT show the lowest reflectance and 10% cell efficiency increase when applied to CIGS thin film solar cells.

Transparent conducting electrodes are essential components in various optoelectrical devices. Although indium tin oxide thin films have been widely used for transparent conducting electrodes, silver nanowire network is a promising alternative to indium tin oxide thin films owing to its lower processing cost and greater suitability for flexible device application. In order to widen the application of silver nanowire network, the electrical conductance has to be improved while maintaining high optical transparency. In this study, we report the enhancement of the electrical conductance of silver nanowire network transparent electrodes by copper electrodeposition on the silver nanowire networks. The electrodeposited copper lowered the sheet resistance of the silver nanowire networks from 21.9 Ω/□ to 12.6 Ω/□. We perform detailed X-ray diffraction analysis revealing the effect of the amount of electrodeposited copper-shell on the sheet resistance of the core-shell(silver/copper) nanowire network transparent electrodes. From the relationship between the cross-sectional area of the copper-shell and the sheet resistance of the transparent electrodes, we deduce the electrical resistivity of electrodeposited copper to be approximately 4.5 times that of copper bulk.

높은 산소 분리 특성과 CO₂에 대한 안정성을 보인 LSTF가 코팅된 BSCF 분리막을 bench 규모의 장치에 적용하여 산소 투과 실험을 수행 하였다. 그 결과 실험실 장치에서 측정한 산소 투과율과 다른 결과를 보였다. 이와 같은 산소 투과율의 변화를 XRD와 SEM/EDS를 통해 분석 하였다. 또한 실험실 규모 장치와 bench 규모 장치의 분리막 반응기 내 온도 구배에 따라서 분리막을 3영역으로 나누어 각각 비교 분석하였다.

본 연구에서는 중국 시장에 진출한 한국 기업을 대상으로 현지에서 CSR을 수행하는 기업의 특성을 파악하고자 하였다. 이를 위해, 내수 시장 진출 목적의 중국 투자 기업 153개 업체를 대상으로 설문조사를 수행하였다. 검증 결과, 모기업의 규모, 고용 규모, 매출 규모 그리고 브랜드 명성이 유의하게 나타났다. 구체적으로, CSR에 적극적인 기업은 모기업 규모가 크고, 고용 규모가 크고, 매출 규모가 크며, 브랜드 명성이 높은 기업인 것으로 나타났다. 이러한 특성은 대기업의 현지 법인의 특성으로, 한국 기업의 중국에서의 CSR은 결국 대기업에 의해 주도되고 있음을 본 연구 결과가 시사해주고 있다. 한편, 소유 형태, 투자 규모와 시장성과는 CSR 수행 정도는 CSR 수행 정도와 유의한 관계를 보이지 않았다. 이론적 관점에서, 한국 기업의 해외 CSR은 선제적 관점의 CSR이론 보다는 방어적 관점의 CSR이론이 설명력이 높은 것으로 나타났다.

Sb-doped SnO2 (ATO) transparent conducting films are fabricated using horizontal ultrasonic spray pyrolysis deposition (HUSPD) to form uniform and compact film structures with homogeneously supplied precursor solution. To optimize the molar concentration and transparent conducting performance of the ATO films using HUSPD, we use precursor solutions of 0.15, 0.20, 0.25, and 0.30 M. As the molar concentration increases, the resultant ATO films exhibit more compact surface structures because of the larger crystallite sizes and higher ATO crystallinity because of the greater thickness from the accelerated growth of ATO. Thus, the ATO films prepared at 0.25 M have the best transparent conducting performance (12.60±0.21 Ω/□ sheet resistance and 80.83% optical transmittance) and the highest figure-of-merit value (9.44±0.17 × 10-3 Ω-1). The improvement in transparent conducting performance is attributed to the enhanced carrier concentration by the improved ATO crystallinity and Hall mobility with the compact surface structure and preferred (211) orientation, ascribed to the accelerated growth of ATO at the optimized molar concentration. Therefore, ATO films fabricated using HUSPD are transparent conducting film candidates for optoelectronic devices.