Achieving Superior Thermoelectric Performance in Ge4Se3Te via Symmetry Manipulation with I–V–VI2 Alloying

M Guo, HH Cui, W Guo, Z Chen, H Ming… - Advanced Functional …, 2024 - Wiley Online Library
Although orthorhombic GeSe is predicted to have an ultrahigh figure of merit, ZT≈ 2.5, up to
now, the highest experimental value is≈ 0.2 due to the low carrier concentration (nH≈ 1018 …

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 …

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 …

High Thermoelectric Performance of New Rhombohedral Phase of GeSe stabilized through Alloying with AgSbSe2

Z Huang, SA Miller, B Ge, M Yan… - Angewandte Chemie …, 2017 - Wiley Online Library
GeSe is a IV–VI semiconductor, like the excellent thermoelectric materials PbTe and SnSe.
Orthorhombic GeSe has been predicted theoretically to have good thermoelectric …

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 …

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 …

Largely Enhanced Seebeck Coefficient and Thermoelectric Performance by the Distortion of Electronic Density of States in Ge2Sb2Te5

P Hu, TR Wei, P Qiu, Y Cao, J Yang… - ACS applied materials …, 2019 - ACS Publications
As one of the state-of-the-art phase-change materials, the stable Ge2Sb2Te5 hexagonal
compound also exhibits decent thermoelectric performance with high electrical conductivity …

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 …

Enhanced thermoelectric performance of band structure engineered GeSe 1− x Te x alloys

D Sidharth, ASA Nedunchezhian, R Akilan… - Sustainable Energy & …, 2021 - pubs.rsc.org
Nanostructured thermoelectric materials of GeSe1− xTex (0≤ x≤ 0.2) alloys were prepared
by mechanical ball milling, followed by consolidation under a hydrogen atmosphere and …

Synergistically Optimized Thermal Conductivity and Carrier Concentration in GeTe by Bi–Se Codoping

L Xu, G Wu, R Wang, Z Yan, J Cai, J Yang… - … Applied Materials & …, 2022 - ACS Publications
The GeTe compound has been revealed to be an outstanding thermoelectric compound,
while its inherent high thermal conductivity restricts further improvement in its performance …