A5012754837- Advanced Thermoelectric Materials and Devices
- Thermal Radiation and Cooling Technologies
- Thermal properties of materials
- Innovative Energy Harvesting Technologies
- 2D Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Perovskite Materials and Applications
- Heusler alloys: electronic and magnetic properties
- Quantum Dots Synthesis And Properties
- Advanced Sensor and Energy Harvesting Materials
- Phase-change materials and chalcogenides
- Phase Change Materials Research
- Transition Metal Oxide Nanomaterials
- Machine Learning in Materials Science
- Advanced Photocatalysis Techniques
- Energy Harvesting in Wireless Networks
- Thermodynamic and Structural Properties of Metals and Alloys
- Additive Manufacturing Materials and Processes
- Vibration Control and Rheological Fluids
- Green IT and Sustainability
- Tactile and Sensory Interactions
- Wireless Power Transfer Systems
- Intermetallics and Advanced Alloy Properties
- Perfectionism, Procrastination, Anxiety Studies
- MXene and MAX Phase Materials
Korea Institute of Materials Science
2022-2024
Ulsan National Institute of Science and Technology
2016-2022
Yonsei University
2011-2022
Output power of thermoelectric generators depends on device engineering minimizing heat loss as well inherent material properties. However, the has been largely neglected due to limited flat or angular shape devices. Considering that surface most sources where these planar devices are attached is curved, a considerable amount inevitable. To address this issue, here, we present shape-engineerable painting, geometrically compatible surfaces any shape. We prepared Bi2Te3-based inorganic paints...
A report is presented on a thermoelectric generator used for harvesting heat energy from human body. The proposed comprises polydimethylsiloxane substrate and materials. use of provides flexibility to the generator. Another advantage using that it has low thermal conductivity; this can help minimise losses in effective flowing through active was easily fabricated dispenser printing attached body generating electrical energy. When temperature difference between ambient air 19 K, output power 2.1 µW.
Abstract The discovery of SnSe single crystals with record high thermoelectric efficiency along the b -axis has led to search for ways synthesize polycrystalline similar efficiencies. However, due weak texturing and difficulties in doping, such efficiencies have not been realized polycrystals or thin films. Here, we show that highly textured hole doped films power factors at crystal level can be prepared by solution process. Purification step synthetic process produced a SnSe-based...
Abstract Thermoelectric power generation offers a promising way to recover waste heat. The geometrical design of thermoelectric legs in modules is important ensure sustainable but cannot be easily achieved by traditional fabrication processes. Herein, we propose the cellular architectures for efficient and durable generation, realized extrusion-based 3D printing process Cu 2 Se materials. We optimum aspect ratio cuboid leg maximize output extend this mechanically stiff hollow hexagonal...
Owing to the increase in demand for energy autonomy electronic systems, there has been increased research interest thermoelectric thin-film-based harvesters. However, fabrication of such devices is challenging when considering material performance and integration processes. SnSe emerged as among best bulk materials capable functioning at high temperatures; however, thin films still limited. Herein, we present a solution-processed high-performance Ag-doped operable low-temperature range. The...
Abstract Thermoelectric devices have received significant attention because of their potential for sustainable energy recovery. In these devices, a thermal design that optimizes heat transfer and dissipation is crucial maximizing the power output. Heat generally requires external active or passive cooling which often suffer from inevitable loss heavy systems. Herein, heat‐sink integrated thermoelectric legs proposed to enhance without realized by finite element model simulation 3D printing...
Abstract Compared with the large plastic deformation observed in ductile metals and organic materials, inorganic semiconductors have limited plasticity (<0.2%) due to their intrinsic bonding characters, restricting widespread applications stretchable electronics. Herein, solution‐processed synthesis of α‐Ag 2 S thin films fabrication all‐inorganic, self‐powered, memory devices, is reported. Molecular Ag complex solution synthesized by chemical reduction powder, fabricating wafer‐scale...
Double half‐Heuslers comprising two aliovalent are promising candidates for thermoelectric materials because of their intrinsically low lattice thermal conductivity; however, poor electronic transport properties need to be overcome. Herein, the effects Sn doping on and p‐type Ti 2 FeNiSb enhance performance via compositional tuning route investigated. The power factor is significantly improved owing synergetic effect increase in density‐of‐states effective mass carrier concentration. In...
The n-type Bi2-xSbxTe3 compounds have been of great interest due to its potential achieve a high thermoelectric performance, comparable that p-type Bi2-xSbxTe3. However, comprehensive understanding on the properties remains lacking. Here, we investigate transport and band characteristics (x = 0.1 – 1.1) based experimental theoretical considerations. We find higher power factor at lower Sb content results from optimized balance between density state effective mass nondegenerate mobility....
In this study, a wearable thermoelectric generator (TEG) in the flexible fabric is proposed for converting human body heat energy to electrical energy. The TEG composed of material, columns (Bi <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Te xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> ) and connection based on conductive component. showed flexibility wearability suitable be applied body. was fabricated dispenser printing,...
The development of thermoelectric (TE) materials to replace Bi2Te3 alloys is emerging as a hot issue with the potential for wider practical applications. In particular, layered Zintl-phase materials, which can appropriately control carrier and phonon transport behaviors, are being considered promising candidates. However, limited data have been reported on properties metal-Sb that be transformed into through insertion cations. this study, we synthesized FeSb MnSb, used base advanced...
Crystalline red phosphorus has very recently emerged as a stable and cost-effective semiconductor material. However, despite its potentiality in electronics optoelectronics, the widespread application of this material is still hampered by limited synthetic route ampoule-based chemical vapor deposition that critically requires mineralizing agents. To address issue, we report synthesis soluble polyphosphide precursors serve inks for solution-processed fabrication crystalline fibrous thin...
We report a strategy toward the synthesis of colloidal nanocrystals capped with inorganic molybdenum and tungsten sulfide ligands. MoS42– WS42– thiometalates were utilized to replace organic ligands capping wide range such as metals, semiconductors, well-conserved primary properties in polar media. Especially, MoS42–- WS42–-capped CdSe nanocryatals showed dramatic enhancement photoluminescence by photo-oxidation treatment, which originated from preferential formation MoSxOy layers on...
In this paper, a passive self frequency tunable energy harvester, which can transduce vibration into electrical energy, is proposed. The proposed harvester composed of cantilever couples be horizontally moved by the large deflection characteristics flexible cantilever. As external fluctuate, resonant tuned in real time change beam length through movement couples. It was confirmed that tune its ranged from 24Hz to 40Hz real-time without an additional source.
An electromagnetic energy harvester for vibrations generated by the human body is proposed. The proposed comprises a magnetic spring and inductive components. It preferred to use vibrations, which are aperiodic in very low frequency domain. components composed of planar coil layers. reduces size harvester, multilayer structure enhances its transduction efficiency. electrical domain ranging from 1 15 Hz, output power was 430 µW. When applied body, 500
The recent interest in wearable electronics suggests flexible thermoelectrics as candidates for the power supply. Herein, we report a solution process to fabricate Sb2Te3 thermoelectric thin films using molecular precursors, synthesized by reduction of powder ethylenediamine and ethanedithiol with superhydride. fabricated exhibit factor ∼8.5 μW cm–1 K−2 at 423 K, maintaining properties during 1000 bending cycles. FePt nanoparticles are homogeneously embedded film, reducing thermal...
Using three-dimensional (3D) printing technology to fabricate Bi2Te3-based thermoelectric (TE) generators opens a potential way create shape-conformable devices capable of recovering waste heat from thermal energy sources with diverse surface morphologies. However, pores formed in 3D-printed materials by the removal organic ink binder result unsatisfactory performance compared bulk materials, which has limited widespread application ink-based 3D process. Furthermore, managing volatile Se...
Electronically doped nanoparticles formed by incorporation of impurities have been great interest because their controllable electrical properties. However, the development a strategy for n-type or p-type doping on sub-10 nm-sized under quantum confinement regime is very challenging using conventional processes, owing to difficulty in synthesis. Herein, we report colloidal chemical synthesis tellurium (Te)-doped Bismuth (Bi) with precisely controlled Te content from 0 5% and systematically...