@article{Yao2026, 
author = {Yitao Yao and Zhiqiang Gao and Pengfei Qiu and Jiali Zhou and Jiawei Zhang and Yasong Wu and Jiong Yang and Xun Shi},
title = {Enhanced plasticity in Ag-excessive Ag2Se-based thermoelectric materials},
year = {2026},
journal = {Journal of Materiomics},
volume = {12},
number = {3},
keywords = {Plasticity, Ag2Se, Flexible thermoelectrics, Ag-excess},
url = {https://www.sciopen.com/article/10.1016/j.jmat.2026.101179},
doi = {10.1016/j.jmat.2026.101179},
abstract = {Recently, Ag2Se has attracted great interest due to its excellent room-temperature thermoelectric (TE) performance, interesting mechanical properties, and environmental friendliness. Tuning the Ag stoichiometry is a conventional strategy to optimize the TE performance of Ag2Se-based materials, but the effects of Ag content on the mechanical properties are still unclear. In this work, we find Ag-excess has weak influence on the plasticity of Ag2Se, but can significantly enhance the plasticity of S-alloyed Ag2Se. The Ag-excessive Ag2.01Se0.7S0.3 can endure large bending strain above 20% without cracking, comparable with those of many metals. The improved plasticity is possibly caused by the increased density of Ag—S bonds. The TE figure-of-merit of plastic Ag2.01Se0.7S0.3 reaches 0.53 at room temperature. The flexible TE device consisting of free-standing Ag2.01Se0.7S0.3 films shows high maximum material normalized power density up to 0.20 W/m under the temperature difference of 25 K. This work sheds light on the further investigation of mechanical properties of Ag-based TE materials.}
}