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Characterizing and Modeling p Xn-Type Transverse Thermoelectric Materials
Characterizing and Modeling p Xn-Type Transverse Thermoelectric Materials
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152723
- ISBN
- 9798384016564
- DDC
- 620.11
- 저자명
- Li, Juncen.
- 서명/저자
- Characterizing and Modeling p Xn-Type Transverse Thermoelectric Materials
- 발행사항
- [Sl] : Northwestern University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 102 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-02, Section: B.
- 주기사항
- Advisor: Grayson, Matthew A.;Kanatzidis, Mercouri G.
- 학위논문주기
- Thesis (Ph.D.)--Northwestern University, 2024.
- 초록/해제
- 요약Transverse thermoelectrics (TTEs) represent a new class of energy materials whose anisotropic structure permits the conversion of heat flow to orthogonal electrical current. (p x n)-type transverse thermoelectrics are anisotropic, exhibiting the ambipolar Seebeck effect with a negative Seebeck coefficient along one direction and a positive Seebeck coefficient in the orthogonal direction, which generates a voltage drop perpendicular to an appropriately oriented temperature gradient, hence the name (p x n) -type transverse thermoelectrics. A few candidate materials were identified based on published anisotropic results, among which CsBi4Te6 is one of the most promising materials for cooling. One particular challenge for studying (p x n) transverse thermoelectrics is the lack of comprehensive, systematic anisotropic measurement methods. Here, large single crystals of CsBi4Te6 are grown. Its galvomagnetic properties are also characterized, indicating signs of the anisotropic Fermi surface. Most importantly, We have developed an all-in-one measurement set-up for measuring the full Seebeck tensor on one sample with a custom-made apparatus, which is also capable of measuring the full resistivity tensor in axis-aligned rectangular prism samples. Experiments on isotropic materials confirmed this apparatus can accurately determine all 9 independent Seebeck components. The method was then tested on bismuth, a model anisotropic thermoelectric material, and both its anisotropic Seebeck and anisotropic resistivity were measured, demonstrating the effectiveness of the method. CsBi4Te6 was also measured with this novel setup. This reusable characterization apparatus promises to accelerate the testing of new TTE materials for novel low-temperature solid-state cooling applications.
- 일반주제명
- Materials science
- 일반주제명
- Thermodynamics
- 일반주제명
- Inorganic chemistry
- 일반주제명
- Electrical engineering
- 기타저자
- Northwestern University Materials Science and Engineering
- 기본자료저록
- Dissertations Abstracts International. 86-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152723
■006m o d
■007cr#unu||||||||
■020 ▼a9798384016564
■035 ▼a(MiAaPQ)AAI31489965
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a620.11
■1001 ▼aLi, Juncen.
■24510▼aCharacterizing and Modeling p Xn-Type Transverse Thermoelectric Materials
■260 ▼a[Sl]▼bNorthwestern University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a102 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-02, Section: B.
■500 ▼aAdvisor: Grayson, Matthew A.;Kanatzidis, Mercouri G.
■5021 ▼aThesis (Ph.D.)--Northwestern University, 2024.
■520 ▼aTransverse thermoelectrics (TTEs) represent a new class of energy materials whose anisotropic structure permits the conversion of heat flow to orthogonal electrical current. (p x n)-type transverse thermoelectrics are anisotropic, exhibiting the ambipolar Seebeck effect with a negative Seebeck coefficient along one direction and a positive Seebeck coefficient in the orthogonal direction, which generates a voltage drop perpendicular to an appropriately oriented temperature gradient, hence the name (p x n) -type transverse thermoelectrics. A few candidate materials were identified based on published anisotropic results, among which CsBi4Te6 is one of the most promising materials for cooling. One particular challenge for studying (p x n) transverse thermoelectrics is the lack of comprehensive, systematic anisotropic measurement methods. Here, large single crystals of CsBi4Te6 are grown. Its galvomagnetic properties are also characterized, indicating signs of the anisotropic Fermi surface. Most importantly, We have developed an all-in-one measurement set-up for measuring the full Seebeck tensor on one sample with a custom-made apparatus, which is also capable of measuring the full resistivity tensor in axis-aligned rectangular prism samples. Experiments on isotropic materials confirmed this apparatus can accurately determine all 9 independent Seebeck components. The method was then tested on bismuth, a model anisotropic thermoelectric material, and both its anisotropic Seebeck and anisotropic resistivity were measured, demonstrating the effectiveness of the method. CsBi4Te6 was also measured with this novel setup. This reusable characterization apparatus promises to accelerate the testing of new TTE materials for novel low-temperature solid-state cooling applications.
■590 ▼aSchool code: 0163.
■650 4▼aMaterials science
■650 4▼aThermodynamics
■650 4▼aInorganic chemistry
■650 4▼aElectrical engineering
■653 ▼aAnisotropic resistivity
■653 ▼aAnisotropic Seebeck
■653 ▼aReusable characterization
■653 ▼aSeebeck coefficient
■653 ▼aTransverse thermoelectrics
■690 ▼a0794
■690 ▼a0488
■690 ▼a0544
■690 ▼a0348
■71020▼aNorthwestern University▼bMaterials Science and Engineering.
■7730 ▼tDissertations Abstracts International▼g86-02B.
■790 ▼a0163
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163555▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
