Highly Suppressed Thermal Conductivity in Diamond-like Cu2SnS3 by Dense Dislocation
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2021-08-18 |
| Journal | ACS Applied Energy Materials |
| Authors | Chao Li, Haili Song, Yan Cheng, Ruijuan Qi, Rong Huang |
| Institutions | Guangdong University of Technology, East China Normal University |
| Citations | 11 |
Abstract
Section titled āAbstractāCu2SnS3 is a promising low-cost and eco-friendly thermoelectric material. However, its rigid diamond crystal structure leads to a high thermal conductivity and hence its overall poor thermoelectric properties. Here we show Ni doping at the Sn site can introduce a dense dislocation of density of ā¼4.83 Ć 109 cm-2 to Cu2SnS3. The abundant dislocations generate a large strain within the matrix, which effectively scatters heat-carrying phonons. The resultant lowest Īŗlatt reaches ā¼0.41 W m-1 K-1 at 723 K, approaching the theoretical limit (0.30 W m-1 K-1). The regulation strategy on dislocations is expected to reduce the thermal conductivity and improve the functionalities of other diamond-like materials.