Abstract
Adjusting the crystal and band structures is of great significance for phonon or carrier transport in functional materials. Lattice contraction was designed to adjust the crystal and energy band structures, which bring about energy valley degeneracy and a band gap decrease in the SnSe system. The Seebeck coefficient of the rapid cooling sample increases significantly due to the energy valley degeneracy. The multichannel effect based on the energy valley degeneracy weakens scattering among the carriers and maintains a high σ along the "⊥" direction. The PF for the rapid cooling sample at 773 K reaches 686 μW m-1 K-2, which is boosted by 66.13% compared with that of the slow cooling sample. Due to the contribution from the high power factor, the ZT value of the rapid cooling sample reaches 0.86, which is an increase of 26% compared with the 0.69 of the slow cooling sample.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
