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Hot Carrier Filtering in Solution Processed Heterostructures: A Paradigm for Improving Thermoelectric Efficiency
Author(s) -
Zhang Yichi,
Bahk JeHyeong,
Lee Joun,
Birkel Christina S.,
Snedaker Matthew L.,
Liu Deyu,
Zeng Hongmei,
Moskovits Martin,
Shakouri Ali,
Stucky Galen D.
Publication year - 2014
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201304419
Subject(s) - materials science , heterojunction , thermoelectric effect , figure of merit , seebeck coefficient , semiconductor , oxide , thermoelectric materials , optoelectronics , nanotechnology , thermal conductivity , metallurgy , composite material , thermodynamics , physics
An approach based on a solution‐based synthesis that produces a thermally stable Ag/oxide/Sb 2 Te 3 ‐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.