Decoupling carrier-phonon scattering boosts the thermoelectric performance of n-type GeTe-based materials

DZ Wang, WD Liu, Y Mao, S Li, LC Yin… - Journal of the …, 2024 - ACS Publications
The coupled relationship between carrier and phonon scattering severely limits the
thermoelectric performance of n-type GeTe materials. Here, we provide an efficient strategy …

Positive effect of Ge vacancies on facilitating band convergence and suppressing bipolar transport in GeTe‐based alloys for high thermoelectric performance

P Li, T Ding, J Li, C Zhang, Y Dou, Y Li… - Advanced Functional …, 2020 - Wiley Online Library
Because the intrinsic Ge vacancies in GeTe usually lead to high hole concentration beyond
the optimal range, many previous studies tend to consider Ge vacancies as negative effects …

Interstitial Cu: an effective strategy for high carrier mobility and high thermoelectric performance in GeTe

LC Yin, WD Liu, M Li, DZ Wang, H Wu… - Advanced Functional …, 2023 - Wiley Online Library
Dense point defects can strengthen phonon scattering to reduce the lattice thermal
conductivity and induce outstanding thermoelectric performance in GeTe‐based materials …

Versatile vanadium doping induces high thermoelectric performance in GeTe via band alignment and structural modulation

Q Sun, M Li, XL Shi, SD Xu, WD Liu… - Advanced Energy …, 2021 - Wiley Online Library
Owing to the moderate energy offset between light and heavy band edges of the rock‐salt
structured GeTe, its figure‐of‐merit (ZT) can be enhanced by the rational manipulation of …

Evolution of defect structures leading to high ZT in GeTe-based thermoelectric materials

Y Jiang, J Dong, HL Zhuang, J Yu, B Su, H Li… - Nature …, 2022 - nature.com
GeTe is a promising mid-temperature thermoelectric compound but inevitably contains
excessive Ge vacancies hindering its performance maximization. This work reveals that …

Boosting the thermoelectric performance of GeTe by manipulating the phase transition temperature via Sb doping

Y Jin, D Wang, Y Qiu, LD Zhao - Journal of Materials Chemistry C, 2021 - pubs.rsc.org
It is well known that the thermoelectric performance of GeTe is difficult to manipulate due to
its intrinsic overhigh carrier concentration and phase transition. Herein, we demonstrate that …

Bi–Zn codoping in GeTe synergistically enhances band convergence and phonon scattering for high thermoelectric performance

Z Guo, Q Zhang, H Wang, X Tan, F Shi… - Journal of Materials …, 2020 - pubs.rsc.org
As an attractive lead-free thermoelectric candidate, GeTe-based materials have been
intensively studied in recent years. However, the ZT value of pristine GeTe is limited around …

Realizing high thermoelectric performance in GeTe through optimizing Ge vacancies and manipulating Ge precipitates

Y Jin, Y Xiao, D Wang, Z Huang, Y Qiu… - ACS Applied Energy …, 2019 - ACS Publications
Recent vast reinvestigations on GeTe, a promising thermoelectric material at medium
temperature, have triggered enormous enthusiasm in the thermoelectric community again …

Origin of the High Performance in GeTe-Based Thermoelectric Materials upon Bi2Te3 Doping

D Wu, LD Zhao, S Hao, Q Jiang, F Zheng… - Journal of the …, 2014 - ACS Publications
As a lead-free material, GeTe has drawn growing attention in thermoelectrics, and a figure of
merit (ZT) close to unity was previously obtained via traditional doping/alloying, largely …

Cu/Sb codoping for tuning carrier concentration and thermoelectric performance of GeTe-based alloys with ultralow lattice thermal conductivity

L Yue, T Fang, S Zheng, W Cui, Y Wu… - ACS Applied Energy …, 2019 - ACS Publications
Pristine GeTe shows promising thermoelectric performance but is limited by the high carrier
concentration (n H) from Ge vacancies and thermal conductivity. Herein, Cu/Sb was chosen …