A5078854779- Advanced Thermoelectric Materials and Devices
- Thermal Radiation and Cooling Technologies
- Thermal properties of materials
- Chalcogenide Semiconductor Thin Films
- Semiconductor materials and interfaces
- Heusler alloys: electronic and magnetic properties
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Innovative Energy Harvesting Technologies
- Perfectionism, Procrastination, Anxiety Studies
- Intermetallics and Advanced Alloy Properties
- Thermal Expansion and Ionic Conductivity
- Gas Sensing Nanomaterials and Sensors
- Energy Harvesting in Wireless Networks
- Transition Metal Oxide Nanomaterials
- Advanced Thermodynamics and Statistical Mechanics
- Ferroelectric and Piezoelectric Materials
- Microwave-Assisted Synthesis and Applications
- Conducting polymers and applications
- Graphene research and applications
- MXene and MAX Phase Materials
- Metamaterials and Metasurfaces Applications
- Mesenchymal stem cell research
- Layered Double Hydroxides Synthesis and Applications
- Periodontal Regeneration and Treatments
Pennsylvania State University
2019-2025
Purdue University West Lafayette
2022
National Renewable Energy Laboratory
2022
U.S. Army Aviation and Missile Command
2022
United States Army Combat Capabilities Development Command
2022
North Carolina State University
2015-2020
Park University
2019
Oklahoma State University
2013
Computational efficient, quasi-3D model for designing body wearable thermoelectric generators and experimental verification.
Abstract Thermoelectric coolers are attracting significant attention for replacing age-old cooling and refrigeration devices. Localized by wearable thermoelectric will decrease the usage of traditional systems, thereby reducing global warming providing savings on energy costs. Since human skin as well ambient air is a poor conductor heat, operate under huge thermally resistive environment. The external thermal resistances greatly influence material behavior, device design, performance, which...
To achieve optimal thermoelectric performance, it is crucial to manipulate the scattering processes within materials decouple transport of phonons and electrons. In half-Heusler (hH) compounds, selective defect reduction can significantly improve performance due weak electron-acoustic phonon interaction. This study utilized Sb-pressure controlled annealing process modulate microstructure point defects Nb0.55Ta0.40Ti0.05FeSb compound, resulting in a 100% increase carrier mobility maximum...
Perovskite solar cells (PSCs) without charge-carrier-transport layers (CTLs) are theoretically achievable due to the ambipolar charge-carrier-transfer characteristics presenting in perovskites. However, power conversion efficiency (PCE) of CTL-free PSCs needs further improvement. Herein, we provide a breakthrough fabrication cost-effective high-performance hole-transport-layer (HTL)-free PSC and trilayer with device configurations fluorine doped tin oxide (FTO)/SnO2/perovskite/carbon...
Thermoelectric generators (TEGs) offer cost-effective and sustainable solid-state energy conversion mechanism from wasted heat into useful electrical power. (TE) materials based upon bismuth telluride (BiTe) systems are widely utilized in applications ranging generation to sensing cooling. There is demand for BiTe with high figure of merit (zT) TEG modules efficiency over intermediate temperatures (25°C–250°C). Here we provide fundamental breakthrough design BiTe-based TE utilize them...
Thermoelectric (TE) generators enable the direct and reversible conversion between heat electricity, providing applications in both refrigeration power generation. In last decade, several TE materials with relatively high figures of merit (zT) have been reported low- high-temperature regimes. However, there is an urgent demand for high-performance working mid-temperature range (400-700 K). Herein, p-type AgSbTe2 stabilized S Se co-doping are demonstrated to exhibit outstanding maximum figure...
Abstract Waste‐heat electricity generation using high‐efficiency solid‐state conversion technology can significantly decrease dependence on fossil fuels. Here, a synergistical optimization of layered half‐Heusler (hH) materials and module to improve thermoelectric efficiency is reported. This realized by manufacturing multiple with major compositional variations temperature‐gradient‐coupled carrier distribution one‐step spark plasma sintering. strategy provides solution overcome the...
Electrochromic smart windows (ESWs) offer an attractive option for regulating indoor lighting conditions. materials based on ion insertion/desertion mechanisms also present the possibility energy storage, thereby increasing overall efficiency and adding value to system. However, current electrochromic electrodes suffer from performance degradation, long response time, low coloration efficiency. This work aims produce defect-engineered brookite titanium dioxide (TiO2 ) nanorods (NRs) with...
Abstract Highly effective electromagnetic (EM) wave absorber materials with strong reflection loss (RL) and a wide absorption bandwidth (EBW) in gigahertz (GHz) frequencies are crucial for advanced wireless applications portable electronics. Traditional microwave absorbers lack magnetic struggle impedance matching, while ferrites stable, exhibit excellent dielectric losses, offer better matching. However, achieving the desired EBW remains challenge, necessitating further composition design....
Thermoelectric generators (TEGs) can convert body heat into electricity, thereby providing a continuous power source for wearable and implantable devices. For wearables, the low fill factor (area occupied by legs over TEG base area) modules are relevant as they provide large thermal gradient across require less material, which reduces cost weight. However, TEGs with below 15% suffer from reduced mechanical robustness; consequently, commercial usually fabricated in range of 25-50%. In this...
Abstract The rapid enhancement of the thermoelectric (TE) figure‐of‐merit ( zT ) in past decade has opened opportunities for developing and transitioning solid state waste heat recovery systems. Here, a segmented TE device architecture is demonstrated conjunction with heterogeneous material integration that results high unicouple‐level conversion efficiency 12% under temperature difference 584 K. This breakthrough result success fabricating bismuth telluride/half‐Heusler unicouple modules...
Cu2-xS and Cu2-xSe have recently been reported as promising thermoelectric (TE) materials for medium-temperature applications. In contrast, Cu2-xTe, another member of the copper chalcogenide family, typically exhibits low Seebeck coefficients that limit its potential to achieve a superior figure merit, zT, particularly in low-temperature range where this material could be effective. To address this, we investigated TE performance Cu1.5-xTe-Cu2Se nanocomposites by consolidating...
Halide perovskites show ubiquitous presences in growing fields at both fundamental and applied levels. Discovery, investigation, application of innovative are heavily dependent on the synthetic methodology terms time-/yield-/effort-/energy- efficiency. Conventional wet chemistry method provides easiness for thin film samples, but represents as an inefficient way bulk crystal synthesis. To overcome these, here we report a universal solid state-based route synthesizing high-quality...
Thermoelectric (TE) materials have made rapid advancement in the past decade, paving pathway toward design of solid-state waste heat recovery systems. The next requirement process is realization full-scale multistage TE devices medium to high temperature range for enhanced power generation. Here, we report and manufacturing skutterudite (SKD)/half-Heusler (hH) cascaded with 49-couple legs each stage. automated pick-and-place tool employed module fabrication providing overall efficiency...
Thermoelectric properties of nanostructured FeSi2, Mg2Si, and SiGe are compared with their nanocomposites SiGe–Mg2Si SiGe–FeSi2. It was found that the addition silicide nanoinclusions to alloy maintained or increased power factor while further reduced thermal conductivity single-phase alloy. This resulted in ZT enhancement Si0.88Ge0.12–FeSi2 by ∼30% over broad temperature range 500-950 °C conventional Si0.80Ge0.20 The Si0.88Ge0.12–Mg2Si nanocomposite showed constantly increasing versus up...
Thermoelectric materials could play a crucial role in the future of wearable electronic devices. They can continuously generate electricity from body heat. For efficient operation systems, addition to high thermoelectric figure merit, zT, material must have low thermal conductivity and Seebeck coefficient. In this study, we successfully synthesized high-performance nanocomposites n-type Bi2Te2.7Se0.3, optimized especially for heat harvesting power generation applications. Different...
The metal–semiconductor nanocomposite of n-type thermoelectric SiGe–FeSi<sub>2</sub>was successfully developed and characterized<italic>versus</italic>electrical, thermal, microstructural properties.
High temperature waste heat recovery has gained tremendous interest to generate useful electricity while reducing the harmful impact on environment. Thermoelectric (TE) solid-state materials enable direct conversion of into with high efficiency, thereby offering a practical solution for recovery. Half-Heusler (hH) alloys are leading TE medium applications, as they exhibit figure merit and mechanical strength at temperatures 973 K. Here we investigate most promising hH represented MNiSn,...
Thermoelectric power generation is a reliable energy harvesting technique for directly converting heat into electricity. Recent studies have reported the thermal-to-electrical conversion efficiency of thermoelectric generators (TEGs) up to 11% under laboratory settings. However, practical TEGs deployed real environments still not more than few percent. In this study, we provide fundamental insight on operation in realistic by illustrating combinatory effect material properties, device...