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Interface Engineering in Solution‐Processed Nanocrystal Thin Films for Improved Thermoelectric Performance
Author(s) -
Ding Defang,
Wang Dawei,
Zhao Man,
Lv Jiawei,
Jiang Hong,
Lu Chenguang,
Tang Zhiyong
Publication year - 2017
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.201603444
Subject(s) - materials science , nanocrystal , ethylenediamine , thermoelectric effect , thin film , heterojunction , nanotechnology , coupling (piping) , optoelectronics , chemical engineering , composite material , inorganic chemistry , chemistry , physics , thermodynamics , engineering
Solution‐processed PbTe nanocrystal (NC) thin films are ligand exchanged by ethylenediamine and then annealed at 400 °C for enhancement of NC coupling. To further improve the performance, heterostructures are introduced into the PbTe/PbS films. Significantly, an optimized ZT of ≈0.30 is successfully achieved at 405 K. This method opens an avenue toward thermoelectric thin film devices with high performance.