In:
Advanced Materials, Wiley
Abstract:
Flexible thermoelectric materials have attracted increasing interest because of their potential use in thermal energy harvesting and high‐spatial‐resolution thermal management. However, a high‐performance flexible micro‐thermoelectric device (TED) compatible with the microelectronics fabrication process has not yet been developed. Here we report a universal epitaxial growth strategy guided by one‐dimensional van der Waals‐coupling, to fabricate freestanding and flexible hybrids comprised of single‐wall carbon nanotubes and ordered (Bi,Sb) 2 Te 3 nanocrystals. High power factors ranging from ∼1680 to ∼1020 μW m −1 K −2 in the temperature range of 300 K to 480 K, combined with a low thermal conductivity yield a high average figure of merit of ∼0.81. The fabricated flexible micro‐TED module consisting of two p‐n couples of freestanding thermoelectric hybrids has an unprecedented open circuit voltage of ∼22.7 mV and a power density of ∼0.36 W cm −2 under a ∼30 K temperature difference, and a net cooling temperature of ∼22.4 K and a heat absorption density of ∼92.5 W cm −2 . This article is protected by copyright. All rights reserved
Type of Medium:
Online Resource
ISSN:
0935-9648
,
1521-4095
DOI:
10.1002/adma.202304751
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
1474949-X