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Engineering Hole Injection and Transport in low-Dimensional Material Transistors
Engineering Hole Injection and Transport in low-Dimensional Material Transistors
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211153002
- ISBN
- 9798346383642
- DDC
- 621.39
- 저자명
- Oberoi, Aaryan.
- 서명/저자
- Engineering Hole Injection and Transport in low-Dimensional Material Transistors
- 발행사항
- [Sl] : The Pennsylvania State University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 273 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-05, Section: B.
- 주기사항
- Advisor: Das, Saptarshi.
- 학위논문주기
- Thesis (Ph.D.)--The Pennsylvania State University, 2024.
- 초록/해제
- 요약In response to the slowdown in transistor footprint scaling, and the increasing computational demands, advanced device development for high-performance and low-power logic applications has routed towards stacking of complementary Silicon (Si) nanosheets. However, traditional Si technology is reaching a tipping point owing to its thickness scaling limitations. Alternative device geometries proposed to reduce leakage while improving electrostatics require materials with beyond-Si capabilities. The utilization of novel, inherently-low-dimensional, semiconducting channel materials with superior electronic properties such as 2D Transition Metal Dichalcogenides (TMDs) and 1D Carbon Nanotubes (CNTs) have been proposed to extend the technology roadmap beyond Si. Conversely, innovative approaches to integrate memory and logic functionalities are worth exploring to address computation demands by tackling data-transfer bottlenecks. Furthermore, always-ON, edge devices, connected across platforms in this digital age, pose a serious security threat. Hence, a ground-up makeover in the next-generation of electronics powered by beyond-Si TMD materials is implemented through a single logic transistor capable of integrating memory, sensing, and security primitives.However, for beyond-Si-CMOS technology the need for enhancing p-type (hole) transport in 2D field-effect transistors (FETs) is identified as a critical yet challenging aspect. Tungsten Diselenide and Molybdenum Diselenide are proposed as promising 2D channel materials due to the more favorable Fermi-level pinning behavior near valence band edge. Techniques such as work-function engineering with the use of Palladium and contact interface optimization with the incorporation of Selenium, are explored to statistically improve hole injection efficiency. Following this strategy, a 3X reduction in contact resistance is achieved, down to 16 kΩ µm.Further, the research delves into threshold voltage engineering of p-type 2D channels using electrostatic modulation, gate dielectric optimization, and charge transfer oxide capping to achieve precise control over threshold voltage. Oxides of Molybdenum, Tungsten, and Germanium are studied in detail for their charge transfer mechanisms into the TMD channel. A large range in threshold voltage is achieved to modulate device behavior between high-performance and low-power operation with current switching ratio over 8 orders in magnitude.Precise layer engineering strategies are also elaborated, aiming to refine the transport properties of p-type transistors through uniform bilayer growth and layer functionalization techniques. Monolayer oxidation by plasma treatment of bilayer WSe2channel with Palladium contacts, reduces contact resistance by 9X whereas functionalization by annealing in NO environment reduces contact resistance down to 3.5 kΩ µm while maintaining current switching ratio over 6 orders in magnitude. Following this, an approach to achieving high-performance p-type 2D FETs is completed.Finally, interface characterization in 1D CNT channels is discussed, presenting methods to mitigate interface defects by post-process annealing. Furthermore, temperature-dependent impedance analysis is employed to assess defect densities across the semiconductor energy gap. This concludes by underscoring the importance of interface characterization in all-interface devices such as devices on low-dimensional channel materials. This work aims to highlight the potential of low-dimensional materials for beyond-Si-CMOS logic.
- 일반주제명
- Microprocessors
- 일반주제명
- Fourier transforms
- 일반주제명
- Semiconductors
- 일반주제명
- Single crystals
- 일반주제명
- Light emitting diodes
- 일반주제명
- Design
- 일반주제명
- CMOS
- 일반주제명
- Metal oxides
- 일반주제명
- Grain size
- 일반주제명
- Graphene
- 일반주제명
- Transistors
- 일반주제명
- Energy consumption
- 일반주제명
- Shear strain
- 일반주제명
- Entropy
- 일반주제명
- Electrical engineering
- 일반주제명
- Energy
- 일반주제명
- Mathematics
- 일반주제명
- Optics
- 기본자료저록
- Dissertations Abstracts International. 86-05B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017164438
■00520250211153002
■006m o d
■007cr#unu||||||||
■020 ▼a9798346383642
■035 ▼a(MiAaPQ)AAI31631317
■035 ▼a(MiAaPQ)PennState20700auo337
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a621.39
■1001 ▼aOberoi, Aaryan.
■24510▼aEngineering Hole Injection and Transport in low-Dimensional Material Transistors
■260 ▼a[Sl]▼bThe Pennsylvania State University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a273 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-05, Section: B.
■500 ▼aAdvisor: Das, Saptarshi.
■5021 ▼aThesis (Ph.D.)--The Pennsylvania State University, 2024.
■520 ▼aIn response to the slowdown in transistor footprint scaling, and the increasing computational demands, advanced device development for high-performance and low-power logic applications has routed towards stacking of complementary Silicon (Si) nanosheets. However, traditional Si technology is reaching a tipping point owing to its thickness scaling limitations. Alternative device geometries proposed to reduce leakage while improving electrostatics require materials with beyond-Si capabilities. The utilization of novel, inherently-low-dimensional, semiconducting channel materials with superior electronic properties such as 2D Transition Metal Dichalcogenides (TMDs) and 1D Carbon Nanotubes (CNTs) have been proposed to extend the technology roadmap beyond Si. Conversely, innovative approaches to integrate memory and logic functionalities are worth exploring to address computation demands by tackling data-transfer bottlenecks. Furthermore, always-ON, edge devices, connected across platforms in this digital age, pose a serious security threat. Hence, a ground-up makeover in the next-generation of electronics powered by beyond-Si TMD materials is implemented through a single logic transistor capable of integrating memory, sensing, and security primitives.However, for beyond-Si-CMOS technology the need for enhancing p-type (hole) transport in 2D field-effect transistors (FETs) is identified as a critical yet challenging aspect. Tungsten Diselenide and Molybdenum Diselenide are proposed as promising 2D channel materials due to the more favorable Fermi-level pinning behavior near valence band edge. Techniques such as work-function engineering with the use of Palladium and contact interface optimization with the incorporation of Selenium, are explored to statistically improve hole injection efficiency. Following this strategy, a 3X reduction in contact resistance is achieved, down to 16 kΩ µm.Further, the research delves into threshold voltage engineering of p-type 2D channels using electrostatic modulation, gate dielectric optimization, and charge transfer oxide capping to achieve precise control over threshold voltage. Oxides of Molybdenum, Tungsten, and Germanium are studied in detail for their charge transfer mechanisms into the TMD channel. A large range in threshold voltage is achieved to modulate device behavior between high-performance and low-power operation with current switching ratio over 8 orders in magnitude.Precise layer engineering strategies are also elaborated, aiming to refine the transport properties of p-type transistors through uniform bilayer growth and layer functionalization techniques. Monolayer oxidation by plasma treatment of bilayer WSe2channel with Palladium contacts, reduces contact resistance by 9X whereas functionalization by annealing in NO environment reduces contact resistance down to 3.5 kΩ µm while maintaining current switching ratio over 6 orders in magnitude. Following this, an approach to achieving high-performance p-type 2D FETs is completed.Finally, interface characterization in 1D CNT channels is discussed, presenting methods to mitigate interface defects by post-process annealing. Furthermore, temperature-dependent impedance analysis is employed to assess defect densities across the semiconductor energy gap. This concludes by underscoring the importance of interface characterization in all-interface devices such as devices on low-dimensional channel materials. This work aims to highlight the potential of low-dimensional materials for beyond-Si-CMOS logic.
■590 ▼aSchool code: 0176.
■650 4▼aMicroprocessors
■650 4▼aFourier transforms
■650 4▼aSemiconductors
■650 4▼aSingle crystals
■650 4▼aLight emitting diodes
■650 4▼aDesign
■650 4▼aCMOS
■650 4▼aMetal oxides
■650 4▼aGrain size
■650 4▼aGraphene
■650 4▼aTransistors
■650 4▼aEnergy consumption
■650 4▼aShear strain
■650 4▼aEntropy
■650 4▼aElectrical engineering
■650 4▼aEnergy
■650 4▼aMathematics
■650 4▼aOptics
■690 ▼a0389
■690 ▼a0544
■690 ▼a0791
■690 ▼a0405
■690 ▼a0752
■71020▼aThe Pennsylvania State University.
■7730 ▼tDissertations Abstracts International▼g86-05B.
■790 ▼a0176
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164438▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


