AI Article Synopsis
- Thermoelectric materials can convert heat into electricity efficiently, making them valuable for energy applications.
- The study created polycrystalline SnPbSeTe samples through vacuum melting and hot pressing, introducing defects to enhance properties.
- Although the power factor decreased due to semiconductor behavior, thermal conductivity dropped significantly, enabling the SnPbSeTe sample to reach a maximum thermoelectric performance value of 0.60 at 750 K.
Article Abstract
Thermoelectric materials can directly convert heat and electricity, which is a kind of promising energy material. In view of cost and mechanical properties, polycrystalline SnSe material with high value is greatly desired. In this study, polycrystalline SnPbSeTe samples were prepared by the vacuum melting-hot pressing sintering method. Sn vacancies, Pb and Te atoms were simultaneously introduced into the polycrystalline SnSe. The power factor of SnPbSeTe samples was decreased, which could be attributed to the generation of -type semiconductor SnSe. In addition, the phonons were strongly scattered by point defects and dislocations, which led to the decrease of thermal conductivity-from 0.43 WmK to 0.29 WmK at 750 K. Finally, the polycrystalline SnPbSeTe sample achieved the maximum value of 0.60 at 750 K.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9100177 | PMC |
| http://dx.doi.org/10.3390/nano12091575 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Heterogeneous Cu Doping Facilitates Excellent Thermoelectric and Mechanical Performance in n-Type SnSe Composites.
ACS Appl Mater Interfaces
December 2024
Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.
SnSe materials have attracted extensive attention in thermoelectrics due to their low thermal conductivity. Nevertheless, the thermoelectric properties of n-type polycrystalline SnSe are still low, and metallic Sn distributed in the SnSe materials would affect the repeatability of thermoelectric performance. Herein, the thermoelectric properties of n-type polycrystalline SnSe-based composites are highly enhanced by heterogeneous Cu doping.
View Article and Find Full Text PDFEnhanced Weighted Mobility Induced High Thermoelectric Performance in Argyrodite AgSnSe.
ACS Appl Mater Interfaces
October 2024
College of Materials, Shanghai Dianji University, Shanghai 201306, China.
Article Synopsis
- - The argyrodite family, known for its conductive properties, shows promise as a thermoelectric material due to its diffusive Ag ions and low thermal conductivity, making it an interesting research subject.
- - This study suggests using the zone melting (ZM) method instead of hot pressing (HP) to create high-density polycrystalline bulk AgSnSe samples, leading to improved thermoelectric properties.
- - ZM-synthesized samples showed a significant increase in weighted mobility by about 60% and achieved a higher peak thermoelectric value at elevated temperatures, indicating ZM's potential for enhancing performance in this material and potentially others in the argyrodite family.
Single Crystalline GeSe Van Der Waals Ribbons With Uniform Layer Stacking, High Carrier Mobility, and Adjustable Edge Morphology.
Small
December 2024
Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA.
Article Synopsis
- High-quality single crystalline GeSe can enhance the performance of solar cells and electronic devices compared to polycrystalline films.
- Researchers successfully used vapor-liquid-solid growth combined with direct lateral vapor-solid incorporation to produce uniform, large GeSe ribbons with controlled thickness and no defects.
- Electrical tests show that these ribbons have high Hall mobility and potential for applications like catalysis, thanks to their jagged edges when grown from mixed vapors.
Influence of Sputtering Power on the Properties of Magnetron Sputtered Tin Selenide Films.
Materials (Basel)
June 2024
Faculty of Materials Science and Ceramics, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, Poland.
Article Synopsis
- The study focuses on developing ecofriendly tin selenide (SnSe) thin films for thermoelectric applications, aiming to improve their efficiency compared to polycrystalline bulk materials.
- Using a modified direct current power supply for magnetron sputtering allows for stable deposition of SnSe films, resulting in high-quality films with a dimensionless figure of merit (ZT) value of 0.5 at 530 K.
- The research also highlights how varying the sputtering power affects the thickness and microstructure of the films, with thermoelectric efficiency showing improvements at higher sputtering powers.
In recent years, solution processes have gained considerable traction as a cost-effective and scalable method to produce high-performance thermoelectric materials. The process entails a series of critical steps: synthesis, purification, thermal treatments, and consolidation, each playing a pivotal role in determining performance, stability, and reproducibility. We have noticed a need for more comprehensive details for each of the described steps in most published works.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!