In:
Advanced Functional Materials, Wiley, Vol. 32, No. 45 ( 2022-11)
Kurzfassung:
Inorganic films possess much higher thermoelectric performance than their organic counterparts, but their poor flexibilities limit their practical applications. Here, Sb 2 Te 3 /Te x hybrid thin films with high thermoelectric performance and flexibility, fabricated via a novel directional thermal diffusion reaction growth method are reported. The directional thermal diffusion enables rationally tuning the Te content in Sb 2 Te 3 , which optimizes the carrier density and leads to a significantly enhanced power factor of 〉 20 µW cm –1 K –2 , confirmed by both first‐principles calculations and experiments; while dense boundaries between Te and Sb 2 Te 3 nanophases, contribute to the low thermal conductivity of ≈0.86 W m –1 K –1 , both induce a high ZT of ≈1 in (Sb 2 Te 3 )(Te) 1.5 at 453 K, ranking as the top value among the reported flexible films. Besides, thin films also exhibit extraordinary flexibility. A rationally designed flexible device composed of (Sb 2 Te 3 )(Te) 1.5 thin films as p ‐type legs and Bi 2 Te 3 thin films as n ‐type legs shows a high power density of 〉 280 µW cm –2 at a temperature difference of 20 K, indicating a great potential for sustainably charging low‐power electronics.
Materialart:
Online-Ressource
ISSN:
1616-301X
,
1616-3028
DOI:
10.1002/adfm.202207903
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2022
ZDB Id:
2029061-5
ZDB Id:
2039420-2
SSG:
11