In situ design of high‐performance dual‐phase GeSe thermoelectrics by tailoring chemical bonds

L Hu, B Duan, T Lyu, N Lin, C Zhang… - Advanced Functional …, 2023 - Wiley Online Library
Composite engineering favors high thermoelectric performance by tuning the carrier and
phonon transport. Herein, orthorhombic and rhombohedral dual‐phase GeSe are designed …

Phase Modulation Enabled High Thermoelectric Performance in Polycrystalline GeSe0.75Te0.25

Z Wang, H Wu, B Zhang, L Dai, Y Huo… - Advanced Functional …, 2022 - Wiley Online Library
The structure–property link is inherent to materials. Hexagonal Ge4Se3Te phase, with
special Ge–Ge cationic bonding and distinctive from other IV–VI compounds, reveals …

The Role of Cation Vacancies in GeSe: Stabilizing High‐Symmetric Phase Structure and Enhancing Thermoelectric Performance

B Duan, Y Zhang, Q Yang, Y Li, J Cheng… - Advanced Energy …, 2022 - Wiley Online Library
Enhancing crystal symmetry is perceived as the most efficacious strategy to improve the
thermoelectric performance of GeSe. Although multicomponent alloying is commonly …

[PDF][PDF] Two-step phase manipulation by tailoring chemical bonds results in high-performance GeSe thermoelectrics

W Yao, Y Zhang, T Lyu, W Huang, N Huang, X Li… - The Innovation, 2023 - cell.com
In thermoelectrics, phase engineering serves a crucial function in determining the power
factor by affecting the band degeneracy. However, for low-symmetry compounds, the …

Synergetic optimization of electronic and thermal transport for high-performance thermoelectric GeSe–AgSbTe 2 alloy

M Yan, X Tan, Z Huang, G Liu, P Jiang… - Journal of Materials …, 2018 - pubs.rsc.org
Rhombohedral GeSe is a promising p-type thermoelectric material with a multivalley band
structure. However, its figure of merit ZT, especially average ZT is still relatively low …

Stepwise Ge vacancy manipulation enhances the thermoelectric performance of cubic GeSe

T Lyu, X Li, Q Yang, J Cheng, Y Zhang, C Zhang… - Chemical Engineering …, 2022 - Elsevier
In thermoelectrics, the native point defect enables the delicate balance between carrier
concentration and carrier mobility. The proper native point defect is prerequisite for the …

Band Modification and Localized Lattice Engineering Leads to High Thermoelectric Performance in Ge and Bi Codoped SnTe–AgBiTe2 Alloys

C Nie, C Wang, Y Xu, Y Liu, X Niu, S Li, Y Gong, Y Hou… - Small, 2023 - Wiley Online Library
SnTe, emerging as an environment‐friendly alternative to conventional PbTe
thermoelectrics, has drawn significant attention for clean energy conversion. Here, a high …

Enhanced Thermoelectric Performance in Ge0.955−xSbxTe/FeGe2 Composites Enabled by Hierarchical Defects

L Xie, R Liu, C Zhu, Z Bu, W Qiu, J Liu, F Xu, Y Pei… - Small, 2021 - Wiley Online Library
Manipulations of carrier and phonon scatterings through hierarchical structures have been
proved to be effective in improving thermoelectric performance. Previous efforts in GeTe …

Structure-Dependent Thermoelectric Properties of GeSe1–xTex (0 ≤ x ≤ 0.5)

Z Wang, H Wu, M Xi, H Zhu, L Dai… - … Applied Materials & …, 2020 - ACS Publications
GeSe was theoretically predicted to have thermoelectric (TE) performance as high as SnSe.
However, the relatively high TE performance was not achieved experimentally in doped …

Crystal symmetry enables high thermoelectric performance of rhombohedral GeSe (MnCdTe2) x

X Li, Z Liang, J Li, F Cheng, J He, C Zhang, J Li, F Liu… - Nano Energy, 2022 - Elsevier
High symmetry favors high power factor by virtue of the balanced Seebeck coefficient and
carrier mobility, nonetheless, the role of crystal symmetry in enhancing the material's …