Journal
NANO LETTERS
Volume 22, Issue 12, Pages 4750-4757Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.2c00947
Keywords
Single atoms; Metal chalcogenide; Thermoelectrics; DFT
Categories
Funding
- National Natural Science Foundation of China [21801133]
- Jiangsu Specially Appointed Professorship, Innovation and Entrepreneurship Talents in Jiangsu Province
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, Nanjing University of Science and Technology
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University
Ask authors/readers for more resources
In this study, a solvothermal synthesis method assisted by a syringe-pump was used to produce Bi2S3-supported Pt single-atom materials. These materials showed high doping efficiency and enhanced Seebeck coefficient, resulting in a high power factor and minimum thermal conductivity. Additionally, they exhibited a record-high zT value at high temperatures, indicating their potential applications.
Single-atom materials are widely explored in production and centimeter-scale assembly, they are rarely studied in thermoelectrics. Herein, we demonstrate a solvothermal synthesis assisted by a syringe-pump method to yield Bi2S3supported Pt single-atom materials (Bi2S3-Pt1) at a 10 g scale. Different from Ptn clusters, Pt1 single atoms can increase carrier concentration at a high doping efficiency and provide a unique atomic environment to enhance carrier mobility, and an enlarged effective mass leads to an enhanced Seebeck coefficient. As a result, a high power factor (348 mu W m-1 K-2) is achieved at 823 K. Benefiting from the scattering of phonons by Pt1 atomic sites, a minimum thermal conductivity of 0.37 W m-1 K-1 is achieved. Consequently, the Bi2S3-0.5 wt % Pt1 realizes a record-high zT of similar to 0.75 at 823 K, being among the best in the state-of-the-art n-type environmentally friendly metal sulfides. The enhancement of the carrier mobility and suppression of the thermal conduction by the unique Pt1 single atoms will inspire various fields, as exemplified by electronic devices and thermal management.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available