A5064682488- Advanced Sensor and Energy Harvesting Materials
- Advanced Thermoelectric Materials and Devices
- Gas Sensing Nanomaterials and Sensors
- Thermal Radiation and Cooling Technologies
- ZnO doping and properties
- Nanowire Synthesis and Applications
- Conducting polymers and applications
- Analytical Chemistry and Sensors
- Perovskite Materials and Applications
- Thin-Film Transistor Technologies
- Semiconductor materials and interfaces
- Muscle activation and electromyography studies
- Advanced Photocatalysis Techniques
- Silicon and Solar Cell Technologies
- Advanced Chemical Sensor Technologies
- Organic Electronics and Photovoltaics
- Advanced battery technologies research
- solar cell performance optimization
- Thermal properties of materials
- Electronic and Structural Properties of Oxides
- Electrocatalysts for Energy Conversion
Korea Research Institute of Chemical Technology
2024-2025
Ulsan National Institute of Science and Technology
2017-2024
Room-temperature (RT) gas sensitivity of morphology-controlled free-standing hollow aluminum-doped zinc oxide (AZO) nanofibers for NO
Abstract Transparent solar cells (TSCs) are emerging devices that combine the advantages of visible transparency and light-to-electricity conversion. Currently, existing TSCs based predominantly on organics, dyes, perovskites; however, rigidity color-tinted transparent nature those strongly limit utility resulting for real-world applications. Here, we demonstrate a flexible, color-neutral, high-efficiency TSC freestanding form n -silicon microwires (SiMWs). Flat-tip SiMWs with controllable...
Abstract A wearable thermoelectric generator (WTEG) that utilizes human body heat can be a promising candidate for the power generators. The temperature difference (Δ T ) between and environment is stable source driving WTEG, but this force limited by ambient itself at same time. Here, novel WTEG operated using dual of light with exceptionally high fabricated. printable solar absorbing layer attached to bottom absorbs ≈95% from ultraviolet far infrared converts it into heat. To optimize...
PEG-treated poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) exhibited an enhanced power factor with increased strain.
Transparent optoelectronics can enable a new class of applications such as transparent displays, smart windows, and invisible sensors. Here, we demonstrate all-transparent NO2 gas sensors based on aluminum-doped zinc oxide (AZO) freestanding hollow nanofibers. Freestanding AZO nanofibers are fabricated by sputtering template polyvinylpyrrolidone (PVP) nanofibers, which electrospun glass frame with indium (IZO) electrodes, followed heat treatment to remove the PVP Not only gas-sensing active...
The efficient realization of bifunctional catalysts has immense opportunities in energy conversion technologies such as water splitting. Transition metal dichalcogenides (TMDs) are considered excellent hydrogen evolution owing to their hierarchical atomic-scale layered structure and feasible phase transition. On the other hand, for oxygen evolution, perovskite oxides offer best performance based on rational design flexible compositional structure. A unique way achieve an reaction (HER) (OER)...
The low-temperature difference (ΔT) of the body-heat-driven wearable thermoelectric generators (WTEG) is one major issues that set back application device. Recently, we proposed a WS-TEG achieves high ΔT by introducing solar absorber on hot side device, which has inspired many subsequent studies. Here, propose systematic approach to further increase considering heat conduction and convection in WS-TEG. For fabrication WS-TEGs, TE legs are dispenser-printed with BiTe-based ink, CNT/MoS2 was...
Abstract The suppression of surface recombination is primary importance for realizing efficient silicon photovoltaics, which usually achieved by introducing passivation or back‐surface field (BSF) layers. In this study, it demonstrated the first time that self‐assembled, ferroelectric, and organic thin‐films can be used as passivating BSF layers both n‐ p‐type Si solar cells switching polarization. n‐Si/PEDOT:PSS heterojunction cell with ambipolar passivated exhibits an efficiency 18.37%, a...
Abstract Organic thermoelectric generators (TEGs) are flexible and lightweight, but they often have high electrical resistance, poor output power, low mechanical durability, because of which their performance is poor. We used a facile rapid solvent evaporation process to prepare robust carbon nanotube/Bi 0.45 Sb 1.55 Te 3 (CNT/BST) foam with figure merit ( zT ). The BST sub‐micronparticles effectively create an electrically conductive network within the three‐dimensional porous CNT greatly...
Abstract Integrated photovoltaics are regarded as next‐generation photovoltaic technologies that can generate electricity in urban areas with limited available land while also serving aesthetic architectural elements. The criteria for integrating into buildings and electronic devices flexibility, color tunability, efficiency, scalability, stability. It is very challenging integrated to demonstrate all‐around performance benefits because performances exist a trade‐off relation, such between...
Here, a highly sensitive triboelectric bending sensor in non-contact mode operation, less to strain, is demonstrated by designing multiple triangular prisms at both sides of the polydimethylsiloxane film. The can detect strained condition (up 20%) as well direction with quite high linear sensitivity (~0.12/degree) up 120°, due electrostatic induction effect between Al and poly (glycerol sebacate) methacrylate. Further increase angle 135° significantly increases 0.16/degree, contact...
Graphene or two-dimensional materials have been intensively studied as a new generation of gas sensing due to their large specific surface area and high mobility. However, fabrication processes for oxide 2D lead non-uniform structures flakes graphene its derivatives nanowire, are randomly suspended devices, resulting in poor unrepeatable performances. Here, we report on the heterogeneous stacked interface reduced (rGO) ZnO nanowires demonstration NO2 sensor. Compared conventional decoration...