DataVXACS Applied Energy MaterialsPaper
journal article·2023-03-13

Inducing High Power Factor in Cu2GeSe3-Based Bulk Materials via (Bi, Zn)-Co-doping

Zeqing Hu, Rong Wei, Chen Yan, Han Wan, Yu Liu, Longjiu Cheng, Zhou Li, Jiming Song

ACS Applied Energy Materials· Volume 6· Issue 5
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Source abstract

Abstract

In this work, carrier concentration optimization and effective mass increase of Cu 2 GeSe 3, which were considered to be a synergetic effect of electrical transport properties, were achieved by the co-doping of Bi and Zn on the Cu site. This effect led to a higher Seebeck coefficient of ∼307.76 μV K –1 at 723 K for the Cu 1.988 Bi 0.01 Zn 0.002 GeSe 3 sample. This effect also resulted in a higher power factor of ∼8.66 μW cm –1 K –2 at 723 K and an average power factor of ∼6.29 μW cm –1 K –2 at the temperature range of 303–723 K for the Cu 1.988 Bi 0.01 Zn 0.002 GeSe 3 sample, which were ∼135 and ∼196% larger than those of pristine Cu 2 GeSe 3, respectively, and are among the highest value of the Cu 2 GeSe 3 -based sample. Benefiting from simultaneous optimization of the power factor, the maximum ZT of ∼0.75 for the Cu 1.988 Bi 0.01 Zn 0.002 GeSe 3 sample at 723 K was obtained, which is ∼288% higher than that of Cu 2 GeSe 3 .
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Research context

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Chemistry & Chemical Engineering, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei 230601, Anhui, PR China

School of Materials Science and Engineering, Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Anhui University, Hefei 230601, Anhui, PR China

School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, Anhui, PR China

Institute of Energy Hefei Comprehensive National Science Center, Hefei 230031, Anhui, PR China

Funding

Anhui Provincial Department of Education · Anhui Provincial Key Research and Development Plan

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