Abstract
A glassy zeolitic imidazolate framework-62 (g-ZIF-62) is used to composite with GeTe for effectively enhancing the mid-frequency phonon scattering to decrease the thermal conductivity of GeTe. After compositing, g-ZIF-62 distributes at the grain boundary of GeTe, leading to reduced lattice thermal conductivity (κl) of 0.31 W m–1 K–1 at 673 K, which is close to the theoretical amorphous limit of GeTe. Meanwhile, the introduction of g-ZIF-62 refrains the hall mobility and electrical conductivity, thus leading to minimized electrical thermal conductivity (κe). Accordingly, such g-ZIF-62 compositing can solely increase the ZT (dimensionless figure of merit) of GeTe of around 32 % at 723 K, even though the other parameters are not technically optimized for improving thermoelectric properties of GeTe. This study suggests that compositing g-ZIF-62 with GeTe can effectively strengthen the mid-frequency phonon scattering to decrease κl and κe of GeTe, providing a reasonable way to enhance the ZT of the thermoelectric materials.
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.
