Interface Engineering in Solution-Processed Nanocrystal Thin Films for Improved Thermoelectric Performance

Defang Ding; Dawei Wang; Man Zhao; Jiawei Lv; Hong Jiang; Chenguang Lu; Zhiyong Tang

doi:10.1002/adma.201603444

Interface Engineering in Solution-Processed Nanocrystal Thin Films for Improved Thermoelectric Performance

Adv Mater. 2017 Jan;29(1). doi: 10.1002/adma.201603444. Epub 2016 Oct 31.

Authors

Defang Ding¹, Dawei Wang¹, Man Zhao¹, Jiawei Lv¹, Hong Jiang², Chenguang Lu^{1

3}, Zhiyong Tang^{1

3}

Affiliations

¹ CAS key laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, No.11, Beiyitiao, Zhongguancun, Beijing, 100190, P. R. China.
² Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, No.2, Beiertiao, Zhongguancun, Beijing, 100871, P. R. China.
³ University of Chinese Academy of Sciences, 19 A Yuquan Rd, Shijingshan District, Beijing, 100049, P. R. China.

PMID: 27797124
DOI: 10.1002/adma.201603444

Abstract

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.

Keywords: nanocrystals; solution-processed; thermoelectrics; thin films.