Defect engineering synergistically modulates power factor and thermal conductivity of CuGaTe2 for ultra-high thermoelectric performance

Zhang, Zipei; Li, Wenhao; Yu, Leijian; Wei, Sitong; Wei, Shikai; Ji, Zhen; Song, Wenli; Zheng, Shuqi

doi:10.1016/j.jmst.2022.04.019

Cited by 13 publications

(7 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…11 or lower than those of other CuGaTe 2 -based chalcogenides. 49–53 The ultralow thermal conductivity is attributed to the severe lattice disorder, as mentioned above. As a consequence, the highest zT value reaches ∼1.90 at 770 K when using the measured C p (see Fig.…”

mentioning

confidence: 91%

Data analytics accelerates the experimental discovery of Cu_1−xAg_xGaTe₂ based thermoelectric chalcogenides with high figure of merit

Zhong,

Hu,

Sarker

et al. 2023

J. Mater. Chem. A

View full text Add to dashboard Cite

show abstract

mentioning

confidence: 91%

Data analytics accelerates the experimental discovery of Cu_1−xAg_xGaTe₂ based thermoelectric chalcogenides with high figure of merit

Zhong,

Hu,

Sarker

et al. 2023

J. Mater. Chem. A

View full text Add to dashboard Cite

show abstract

“…Temperature dependence of figure of merit ZT of the (CuGaTe 2 ) 0.96 (AgCl) 0.04 sample and other reported optimized CuGaTe 2 materials ,,,,,,− (the data of refs , and in the figure are reused with the permission of RSC).…”

Section: Resultsmentioning

confidence: 99%

AgCl Addition to Chalcopyrite Compound for Ultra-Low Thermal Conductivity in Realizing High ZT Thermoelectric Materials

Zhang

Luo

et al. 2023

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Optimizing the performance of thermoelectric materials by reducing its thermal conductivity is crucial to enhance its thermoelectric efficiency. Novel thermoelectric materials like the CuGaTe2 compound are hindered by high intrinsic thermal conductivity, which negatively impacts its thermoelectric performance. In this paper, we report that the introduction of AgCl by the solid-phase melting method will influence the thermal conductivity of CuGaTe2. The generated multiple scattering mechanisms are expected to reduce the lattice thermal conductivity while maintaining sufficient good electrical properties. The experimental results were supported by first-principles calculations confirming that the doping of the Ag will decrease the elastic constants, bulk modulus, and shear modulus of CuGaTe2, which makes the mean sound velocity and Debye temperature of Ag-doped samples lower than those of CuGaTe2, indicating the lower lattice thermal conductivity. In addition, the Cl elements within the CuGaTe2 matrix escaping during the sintering process will create holes of various sizes within the sample. These combined effects of holes and impurities will induce phonon scattering, which further reduces the lattice thermal conductivity. Based on our findings, we conclude that the introduction of AgCl into CuGaTe2 has shown a lower thermal conductivity without compromising the electrical performance, resulting in an ultra-high ZT value of 1.4 in the (CuGaTe2)0.96(AgCl)0.04 sample at 823 K.

show abstract

“…Our previous work [71] investigated the impact of introducing Cu defects on the thermoelectric performance of CuGaTe 2 and we found that the carrier concentration of Cudeficient CuGaTe 2 was greatly increased. Cu 0.94 GaTe 2 and Cu 0.92 GaTe 2 samples had carrier concentrations as high as 10 20 cm −3 , resulting in excellent electrical performance.…”

Section: Cu Vacancy Defectsmentioning

confidence: 99%

Topical review: characterization of chalcopyrite CuGa(In)Te₂ compounds for high thermoelectric performance

Zhang,

Luo,

et al. 2023

J. Phys. D: Appl. Phys.

Self Cite

View full text Add to dashboard Cite

The chalcopyrite compound CuGa(In)Te2 has garnered significant attention due to its safe elemental composition and high thermoelectric potential. Optimizing the carrier concentration and reducing the lattice thermal conductivity of CuGa(In)Te2 can significantly enhance its thermoelectric performance. In this mini-review, we analyze the electronic and phonon structures of CuGa(In)Te2, summarize and categorize the representative methods employed in recent years to improve its thermoelectric performance. Our analysis reveals that reducing thermal conductivity has a more significant impact on enhancing the ZT value of CuGa(In)Te2 compared to increasing the power factor. In conclusion, we outline potential challenges and provide a brief outlook, offering valuable insights into the design of CuGa(In)Te2 chalcopyrite compounds as high-performance thermoelectric materials.

show abstract

Defect engineering synergistically modulates power factor and thermal conductivity of CuGaTe2 for ultra-high thermoelectric performance

Cited by 13 publications

References 27 publications

Data analytics accelerates the experimental discovery of Cu_1−xAg_xGaTe₂ based thermoelectric chalcogenides with high figure of merit

Data analytics accelerates the experimental discovery of Cu_1−xAg_xGaTe₂ based thermoelectric chalcogenides with high figure of merit

AgCl Addition to Chalcopyrite Compound for Ultra-Low Thermal Conductivity in Realizing High ZT Thermoelectric Materials

Topical review: characterization of chalcopyrite CuGa(In)Te₂ compounds for high thermoelectric performance

Contact Info

Product

Resources

About

Defect engineering synergistically modulates power factor and thermal conductivity of CuGaTe2 for ultra-high thermoelectric performance

Cited by 13 publications

References 27 publications

Data analytics accelerates the experimental discovery of Cu1−xAgxGaTe2 based thermoelectric chalcogenides with high figure of merit

Data analytics accelerates the experimental discovery of Cu1−xAgxGaTe2 based thermoelectric chalcogenides with high figure of merit

AgCl Addition to Chalcopyrite Compound for Ultra-Low Thermal Conductivity in Realizing High ZT Thermoelectric Materials

Topical review: characterization of chalcopyrite CuGa(In)Te2 compounds for high thermoelectric performance

Contact Info

Product

Resources

About

Data analytics accelerates the experimental discovery of Cu_1−xAg_xGaTe₂ based thermoelectric chalcogenides with high figure of merit

Data analytics accelerates the experimental discovery of Cu_1−xAg_xGaTe₂ based thermoelectric chalcogenides with high figure of merit

Topical review: characterization of chalcopyrite CuGa(In)Te₂ compounds for high thermoelectric performance