Hot carrier filtering in solution processed heterostructures: a paradigm for improving thermoelectric efficiency.
An approach based on a solution-based synthesis that produces a thermally stable Ag/oxide/S₂ Te₃ -Te metal-semiconductor heterostructure is described. With this approach, a figure of merit of zT = 1.0 at 460 K is achieved, a record for a heterostructured material made using wet chemistry. Combining experiments and theory shows that the large increase in the material's Seebeck coefficient results from hot carrier filtering.
Department of Chemistry and Biochemistry, University of California-Santa Barbara, Santa Barbara, CA, 93106, U.S.
Yichi
Y
Zhang
Je-Hyeong
JH
Bahk
Joun
J
Lee
Christina S
CS
Birkel
Matthew L
ML
Snedaker
Deyu
D
Liu
Hongmei
H
Zeng
Martin
M
Moskovits
Ali
A
Shakouri
Galen D
GD
Stucky
atomic layer deposition (ALD); hetero-structure; hot carrier filtering effect; molecular metal chalcogenide; solution processed; thermoelectric