A5100625449- Thin-Film Transistor Technologies
- Nanowire Synthesis and Applications
- solar cell performance optimization
- Advanced Sensor and Energy Harvesting Materials
- Silicon and Solar Cell Technologies
- Advancements in Battery Materials
- Silicon Nanostructures and Photoluminescence
- Nanomaterials and Printing Technologies
- Thermal Radiation and Cooling Technologies
- Advanced battery technologies research
- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Aerospace Engineering and Control Systems
- Robotic Path Planning Algorithms
- Robotics and Automated Systems
- Heat Transfer and Boiling Studies
- Simulation and Modeling Applications
- Tactile and Sensory Interactions
- Advanced Battery Materials and Technologies
- Fluid Dynamics and Thin Films
- Supercapacitor Materials and Fabrication
- Advanced Photocatalysis Techniques
- Robotics and Sensor-Based Localization
- Transition Metal Oxide Nanomaterials
- Optimization and Search Problems
Chung-Ang University
2025
Ulsan National Institute of Science and Technology
2017-2025
Sungkyunkwan University
2022-2023
Korea Advanced Institute of Science and Technology
2021-2022
Government of the Republic of Korea
2020
Korea Foundation for Max Planck POSTECH
2017-2018
Pohang University of Science and Technology
2017
Transparent conducting electrodes (TCEs) are considered to be an essential structural component of flexible organic solar cells (FOSCs). Silver nanowire (AgNW) widely used as TCEs owing their excellent electrical and optical properties. The fabrication AgNW has faced challenges in terms forming large uniform interconnected networks so that high conductivity reproducibility can achieved. In this study, a simple method for creating intimate contact between AgNWs uses cold isostatic pressing...
Transparent photovoltaics (TPVs), which combine visible transparency and solar energy conversion, are being developed for applications in conventional opaque cells unlikely to be feasible, such as windows of buildings or vehicles. In this paper, we review recent progress TPVs along with strategies that enable the photovoltaics, including thin-film technology, selective light-transmission luminescent concentrator technology. From fundamental research commercialization TPV, three main...
Abstract Stretchable electronics are considered as next‐generation devices; however, to realize stretchable electronics, it is first necessary develop a deformable energy device. Of the various components in devices, fabrication of current collectors crucial because they must be mechanically robust and have high electrical conductivity under deformation. In this study, authors present conductive polymer composite composed Jabuticaba‐like hybrid carbon fillers containing nanotubes black...
Abstract Alkaline water splitting electrocatalysts have been studied for decades; however, many difficulties remain commercialization, such as sluggish hydrogen evolution reaction (HER) kinetics and poor catalytic stability. Herein, by mimicking the bulk‐heterojunction morphology of conventional organic solar cells, a uniform 10 nm scale nanocube is reported that consists subnanometer‐scale heterointerfaces between transition metal phosphides oxides, which serves an alkaline electrocatalyst;...
Thin crystalline silicon (c-Si) showing outstanding flexibility has been considered as an active material for flexible solar cells. However, effective photon management should be developed thin c-Si, which shows severe light absorption loss. Here, we introduce random inverted-pyramidal polydimethylsiloxane (RIP-PDMS) films on the surface of c-Si cell to simultaneously secure high and flexibility. Attaching RIP-PDMS film front device can significantly reduce reflection; near-infrared...
Forming light-transmitting structures on c-Si photovoltaics to transmit visible light without wavelength dependency is a promising strategy realize neutral-color transparent (c-Si TPVs). However, dry etching, which used form structure c-Si, inevitably causes nanoscale surface damages such as scallops and plasma-induced damage in c-Si. This aggravates carrier recombination, decreases power conversion efficiency (PCE) of TPVs. Here, we propose an effective chemical treatment method for...
With the rising demand for data centers, need an efficient thermal management approach becomes increasingly critical. This study examines enhancement in pool boiling heat transfer on a customized multichip module, designed to mimic artificial intelligence chip layouts high‐performance computing. Experiments are conducted smooth surfaces and hierarchical structures integrating micropillars porous copper, specifically copper inverse opal (CuIO) nanowire (NW). The results demonstrate...
Abstract Transparent solar cells maximize installation space by being applicable to glass areas such as building windows and sunroofs, necessitating high power conversion efficiency (PCE), long‐term stability, aesthetic appeal. This study demonstrates the development of transparent crystalline silicon ( c ‐Si) that exhibit vivid colors, enhanced PCE, stability. To achieve coloration, a metal‐oxide‐based color filter with single metal layer TiO 2 thin films, which show transmittance, is...
This review introduces recent progress in silicon microwire solar cells, including the strategies toward achieving low-cost and high-efficiency cells.
Transparent solar cells (TSCs) can be used in systems where conventional opaque cannot applied, such as the glass windows of buildings and sunroofs vehicles. Although extensive research is being conducted on development TSCs, some critical limitations remain, including low power conversion efficiency (PCE), reduction PCE with changes angle incidence light, temperature increase TSC. In this study, we address these issues by selectively applying microscale inverted-pyramidal-structured...
We report deep metal-assisted chemical etching using a porous monolithic AgAu layer on crystalline silicon as an alternative to the expensive reactive ion for fabricating neutral-colored transparent photovoltaics.
The fabrication of a high-performance electrothermal and anticorrosive transparent heating sticker employing novel Ni/Ag hybrid microgrid electrode is reported.
Transparent solar cells (TSCs) hold substantial potential as continuous energy generators, enabling their use in situations where conventional devices may not be feasible. However, research aimed at modularizing TSCs for the purpose of regulating overall voltage and current they produce, a critical step toward practical application, is still its nascent stages. In this study, we explored custom-designed, all-back-contact (ABC) configuration, which situates all electrical contacts on rear...
Transparent solar cells can be used where conventional are inapplicable, such as, in glass windows of buildings; however, reports on modularization, which is essential for their commercialization, scarce. Here, a novel modularization method has been proposed the fabrication transparent and 100-cm2 neutral-color crystalline-silicon module developed using hybrid electrode comprising microgrid an edge busbar electrode. The exhibits power conversion efficiency (PCE) 11.94 13.14% when connected...
Abstract A cost‐effective process is reported for fabricating flexible transparent conducting electrodes (TCEs) through the use of a reusable silicon master mold with microgrid patterned Ag/Cr–metal double layer. Flexible TCEs can be simply produced via metal electroplating on followed by transfer onto polymer substrate. Nickel (Ni), an inexpensive metal, used as TCE material in this study, allowing low‐cost fabrication. The fabricated Ni exhibit excellent optical and electrical properties...
Abstract Designing reliable stretchable electronic devices is challenging as the stress caused by stretching deformation hinders material performances. Furthermore, electrode resistance considerably increases upon stretching, thereby distorting electrical signals and causing errors. Herein, a hydrophilic solution process for fabricating conductive composite reported. This forms an internal structure that improves conductivity concentrating fillers to create path. It also minimizes changes in...
Voltage-tunable, all-day operating portable power supplies based on tailored integration of silicon photovoltaics and bipolar lithium-ion batteries are demonstrated with a wide voltage window, high overall efficiency, stable cyclability.
Reliable Stretchable Conductor The process using a hydrophilic liquid improves the reliability of stretchable conductive composite materials. This forms an internal structure that consumes strain during stretching, thereby minimizing changes in resistance cyclic stretching and maximizing elastic durability. It also conductivity by concentrating fillers to increase number paths. More details can be found article 2201021 Sungmook Jung co-workers.
Abstract To design a high‐efficiency crystalline silicon ( c‐ Si) photocathode, the photovoltage and photocurrent generated by device must be maximized because these factors directly affect hydrogen evolution reaction (HER). In this study, Si p–n junction is used to enhance of tapered microwire array structure introduced increase photocurrent. When arrays are employed on front surface current density ≈41.7 mA cm − 2 achieved at 0 V RHE (reversible electrode); highest among all reported...
자바스크립트의 성능을 개선하기 위한 목적으로 asm.js가 제안되었다. asm.js는 부분집합 언어이고, 일반적인 네이티브 애플리케이션의 절반정도의 보이는 것으로 알려져 있다. 해당 언어를 활용하여 애플리케이션을 개발하기 위해 현재로서는 C/C++ 언어로 한번 개발한 후 asm.js로 컴파일하거나, 직접적으로 개발하는 방법을 활용해야 한다. 하지만 이는 기존의 자바스크립트로 작성된 활용하지 못하는 개발 구조로, 같은 기능을 수행하지만 다른 새로이 것과 같다. 본 연구에서는 자바스크립트 소스 코드를 이용한 asm.js 개발이 가능하도록 자바스크립트-to-asm.js 컴파일러를 설계 및 개발하여 비합리적인 환경을 개선하고자 또한 자바스크립트로부터 변환된 코드의 실험을 통해 컴파일러의 검증하고자
Unmanned aerial systems (UAS) with embedded machine learning applications are applied in various fields for autonomous refueling (AAR), concept of parent-child UAV system, drone swarm, teaming manned aircraft and UAV, package delivery, etc. The fundamental challenge an air-to-air docking phase is securing between a leader follower vehicles effective target detection strategy. This paper proposes system unmanned vehicle (UAV) that detects, tracks, docks to drogue. proposed operated on onboard...
Coupling solar cells with energy storage devices promises to overcome longstanding issues on intermittency and longevity of the individual systems. To enable practical/versatile applications coupled power sources, their operating voltages should be widened customized specific purpose. Here, we demonstrate for first time a new class voltage-tunable, all-day portable supplies based monolithic integration interdigitated back contact-structured crystalline silicon photovoltaic (cSiPV) modules...
To meet strong emission regulations such as Euro-7, which is expected to be implemented in 2025, gasoline engine and vehicle researchers are making considerable efforts drastically reduce emissions while maintaining or improving combustion performance. With the application of ultra-high-pressure fuel injection, multiple-injection strategy a well-known solution exhaust gas without adverse effects on efficiency In high-speed system, order inject high-pressure several times within short period...