Ferroelectric Instability Induced Ultralow Thermal Conductivity and High Thermoelectric Performance in Rhombohedral p-Type GeSe Crystal

D Sarkar, T Ghosh, S Roychowdhury… - Journal of the …, 2020 - ACS Publications
The orthorhombic phase of GeSe, a structural analogue of layered SnSe (space group:
Pnma), has recently attracted attention after a theoretical prediction of high thermoelectric …

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 …

Metavalent bonding in GeSe leads to high thermoelectric performance

D Sarkar, S Roychowdhury, R Arora… - Angewandte Chemie …, 2021 - Wiley Online Library
Orthorhombic GeSe is a promising thermoelectric material. However, large band gap and
strong covalent bonding result in a low thermoelectric figure of merit, zT≈ 0.2. Here, we …

Band and phonon engineering for thermoelectric enhancements of rhombohedral GeTe

H Liu, X Zhang, J Li, Z Bu, X Meng… - ACS applied materials …, 2019 - ACS Publications
Rhombohedral GeTe can be approximated as the directional distortion of the cubic GeTe
along [111]. Such a symmetry-breaking of the crystal structure results in an opposite …

Stabilizing n‐Type Cubic GeSe by Entropy‐Driven Alloying of AgBiSe2: Ultralow Thermal Conductivity and Promising Thermoelectric Performance

S Roychowdhury, T Ghosh, R Arora… - Angewandte Chemie …, 2018 - Wiley Online Library
The realization of n‐type Ge chalcogenides is elusive owing to intrinsic Ge vacancies that
make them p‐type semiconductors. GeSe crystallizes into a layered orthorhombic structure …

Engineering ferroelectric instability to achieve ultralow thermal conductivity and high thermoelectric performance in Sn 1− x Ge x Te

A Banik, T Ghosh, R Arora, M Dutta, J Pandey… - Energy & …, 2019 - pubs.rsc.org
High thermoelectric performance of a crystalline solid requires it to have low thermal
conductivity which is one of the utmost material challenges. Herein, we demonstrate how the …

[HTML][HTML] Thermoelectric properties of GeSe

X Zhang, J Shen, S Lin, J Li, Z Chen, W Li, Y Pei - Journal of Materiomics, 2016 - Elsevier
The recently reported superior thermoelectric performance of SnSe, motivates the current
work on the thermoelectric properties of polycrystalline GeSe, an analog compound with the …

Low Thermal Conductivity and High Thermoelectric Performance in (GeTe)1–2x(GeSe)x(GeS)x: Competition between Solid Solution and Phase Separation

M Samanta, K Biswas - Journal of the American Chemical Society, 2017 - ACS Publications
GeTe and its derivatives constituting Pb-free elements have been well known as potential
thermoelectric materials for the last five decades, which offer paramount technological …

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 …

Realization of Both n- and p-Type GeTe Thermoelectrics: Electronic Structure Modulation by AgBiSe2 Alloying

M Samanta, T Ghosh, R Arora… - Journal of the …, 2019 - ACS Publications
Successful applications of a thermoelectric material require simultaneous development of
compatible n-and p-type counterparts. While the thermoelectric performance of p-type GeTe …