[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 …

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 …

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 …

Doping by design: enhanced thermoelectric performance of GeSe alloys through metavalent bonding

Y Yu, C Zhou, T Ghosh, CF Schön, Y Zhou… - Advanced …, 2023 - Wiley Online Library
Doping is usually the first step to tailor thermoelectrics. It enables precise control of the
charge‐carrier concentration and concomitant transport properties. Doping should also turn …

Germanium chalcogenide thermoelectrics: electronic structure modulation and low lattice thermal conductivity

S Roychowdhury, M Samanta, S Perumal… - Chemistry of …, 2018 - ACS Publications
Thermoelectric materials can convert untapped heat to electricity and are expected to have
an important role in future energy utilization. IV–VI metal chalcogenides are the most …

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 …

[PDF][PDF] Rashba effect maximizes thermoelectric performance of GeTe derivatives

M Hong, W Lyv, M Li, S Xu, Q Sun, J Zou, ZG Chen - Joule, 2020 - cell.com
Advances in thermoelectrics are motivated by the innovation of thermoelectric theories. The
Rashba effect, spin-dependent band splitting, paves a new path to enhance thermoelectric …

Strong Phonon–Phonon Interactions Securing Extraordinary Thermoelectric Ge1–xSbxTe with Zn-Alloying-Induced Band Alignment

M Hong, Y Wang, T Feng, Q Sun, S Xu… - Journal of the …, 2018 - ACS Publications
The ability of substitution atoms to decrease thermal conductivity is usually ascribed to the
enhanced phonon-impurity scattering by assuming the original phonon dispersion relations …

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 …

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 …