A5065759356- Advanced Thermoelectric Materials and Devices
- Chalcogenide Semiconductor Thin Films
- Thermal Expansion and Ionic Conductivity
- Quantum Dots Synthesis And Properties
- 2D Materials and Applications
- Perovskite Materials and Applications
- Phase-change materials and chalcogenides
- Nanocluster Synthesis and Applications
- Quasicrystal Structures and Properties
- Rare-earth and actinide compounds
- Transition Metal Oxide Nanomaterials
- Physics of Superconductivity and Magnetism
- Organic Light-Emitting Diodes Research
- nanoparticles nucleation surface interactions
- Heusler alloys: electronic and magnetic properties
National Tsing Hua University
2019-2024
Institute of Atomic and Molecular Sciences, Academia Sinica
2016-2020
Academia Sinica
2018
SnTe, a lead-free chalcogenide-based material, shows potential to achieve high thermoelectric performance.
The present study reports the effect of Sn substitution on structural and thermoelectric properties synthetic tetrahedrite (Cu12Sb4S13) system. samples were prepared with intended compositions Cu12Sb4- xSn xS13 ( x = 0.25, 0.35, 0.5, 1) sintered using spark plasma sintering. A detailed characterization revealed phase as main substituting at both Cu Sb sites instead only site. theoretical calculations density functional theory that Cu(1) 12d or Cu(2) 12e site moves Fermi level EF) toward band...
Introducing vacancies in oxychalcogenides is an effective paradigm for the improvement of thermoelectric properties by reducing thermal conductivity through phonon scattering as well decreasing electrical resistivity via incorporation holes vacancies. In this paper, we present Bi1−x CuSeO1−y with y = 0 x 0, 0.04, and 0.02 0.08, 0.12. X-ray diffraction studies reveal BiCuSeO main phase trace amounts Cu1.8Se Bi0.92CuSeO0.98 Bi0.88CuSeO0.98. The impurity phases Bi0.88CuSeO0.98 could be due to...
Cr substituted tetrahedrites with the chemical formula Cu12-xCrxSb4S13 (x = 0.15, 0.25, 0.35, 0.5, 0.75, 1.0) have been synthesised for thermoelectric study. substitutes at Cu site to optimize properties and achieve a higher figure of merit (zT). X-Ray diffraction (XRD) analysis revealed that tetrahedrite is major phase minor impurity phases. Electron probe microanalysis (EPMA) shows formation main near stoichiometry presence Cu3SbS4, CuSbS2 Sb as secondary X-ray photoelectron spectroscopy...
Decagonal quasicrystals are receiving considerable attention because of their unique crystallographic structure, electrical, magnetic, and mechanical properties. Hence, anisotropic decagonal nano‐quasicrystals (NQCs) will have potential applications in multifunctional devices. Here, the NQCs prepared from an bulk sample by liquid exfoliation via ultrasonic process at room temperature. The high transmittance incorporated into green organic light‐emitting diodes solution dry processes for...
Low-color-temperature candlelight organic light-emitting diodes (OLEDs) offer a healthier lighting alternative by minimizing blue light exposure, which is known to disrupt circadian rhythms, suppress melatonin, and potentially harm the retina with prolonged use. In this study, we explore integration of transition metal dichalcogenides (TMDs), specifically molybdenum disulfide (MoS2) tungsten (WS2), into hole injection layers (HILs) OLEDs enhance their performance. The TMDs, are for superior...
Chalcopyrite (CuFeS2) is an earth abundant, non-toxic, thermoelectric (TE) material with a high Seebeck coefficient of -480 µV K−1 at 300 K. But its TE performance hindered due to low electrical conductivity (∼ 29 S cm−1 K) and thermal 6.5 Wm−1K−1 K). Pristine CuFeS2 Co,Se substituted compounds were prepared by solid state method. Powder X-ray diffraction confirmed the formation phase (ICSD#2518). The transport properties measured between temperature 350 673 (S) was negative for pristine...
The electronegativity difference between the filler and host atom of skutterudites determines bonding type, which effects thermoelectric properties. electropositive elements with low compared to Sb can form n-type filled skutterudites. In this study, electronegative element sulphur has into voids. A series SxCo4Sb12 (x= 0.05 0.4) compounds were synthesized by solid-state method. CoSbS secondary phase was observed for x >0.05. Filling fraction void (∼ 0.04) calculated using electron probe...