A Solvothermal Synthetic Environmental Design for High-Performance SnSe-Based Thermoelectric Materials

121Citations
Citations of this article
42Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

SnSe is challenging to use in thermoelectric devices due to difficulties in simultaneously optimizing its thermoelectric and mechanical properties. Here, the authors show a unique solvothermal synthetic environmental design to fabricate super-large and micro/nanoporous Sn0.965Se microplates by using CrCl3. Cl− ions to trigger Sn-vacancy formation and optimize the hole concentration to ≈3 × 1019 cm−3, while the as-formed Cr(OH)3 colloidal precipitations act as “templates” to achieve micro/nanoporous features, leading to low lattice thermal conductivity of ≈0.2 W m−1 K−1 in the as-sintered polycrystal, contributing to a high ZT of ≈2.4 at 823 K and an average ZT of ≈1.1. Of particular note, the polycrystal exhibits high hardness (≈2.26 GPa) and compression strength (≈109 MPa), strengthened by grain refinement and vacancy-induced lattice distortions and dislocations; while a single-leg device provides a stable output power (>100 mW) and conversion efficiency of ≈10% by a temperature difference of 425 K, indicating great potential for applying to practical thermoelectric devices.

Cite

CITATION STYLE

APA

Shi, X. L., Liu, W. D., Li, M., Sun, Q., Xu, S. D., Du, D., … Chen, Z. G. (2022). A Solvothermal Synthetic Environmental Design for High-Performance SnSe-Based Thermoelectric Materials. Advanced Energy Materials, 12(20). https://doi.org/10.1002/aenm.202200670

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free