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Pushing the Limit of Power Density in Devices with Ultra-Wide Bandgap (All-AlGaN) Heterostructures
Pushing the Limit of Power Density in Devices with Ultra-Wide Bandgap (All-AlGaN) Heterost...
Pushing the Limit of Power Density in Devices with Ultra-Wide Bandgap (All-AlGaN) Heterostructures

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20250211153059
ISBN  
9798346380771
DDC  
620
저자명  
Noshin, Maliha.
서명/저자  
Pushing the Limit of Power Density in Devices with Ultra-Wide Bandgap (All-AlGaN) Heterostructures
발행사항  
[Sl] : Stanford University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
112 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-05, Section: A.
주기사항  
Advisor: Chowdhury, Srabanti.
학위논문주기  
Thesis (Ph.D.)--Stanford University, 2024.
초록/해제  
요약The increasing energy-consumption due to increased electrification of our society is pushing the limit of today's power-electronics systems. To address this challenge, the development of higher energy-density power-electronic devices and systems will be a key enabler of energy technologies for future grid-electronics and data centers. To this end, ultrawide-bandgap (UWBG) semiconducting materials-like aluminum gallium nitride (AlGaN) are emerging as promising candidates for high-power electronics, beyond the limitations of conventional materials like silicon.In this thesis, I will present the first demonstration of nitrogen (N)-polar AlGaN (Al = 20% to 73%) heterostructure based high-electron mobility transistors. First, I will discuss the compositional design space and metal organic chemical vapor deposition (MOCVD)-growth of such heterostructures to realize a tunable and large bandgap, followed by the materials characterization. I will simultaneously explain how the alloy-dominated scattering of charge carriers in such material system can control its two-dimensional electron gas mobility. Leveraging these fundamental understanding, I will demonstrate the realization of the first N-polar AlGaN-channel high electron mobility transistors, achieving simultaneously large drive current, low contact resistance, low leakage current and large breakdown voltage. Finally, I will illustrate the interface-driven thermal and electrical transport and their temperature dependence in such heterostructures, offering important insights into material-device codesign, electronic device functionality and reliability. This work demonstrates the outstanding potential of AlGaN-based heterostructures for high-power density electronic devices and systems.
일반주제명  
Silicon
일반주제명  
Electrons
일반주제명  
Optimization techniques
일반주제명  
Electric fields
일반주제명  
Electric vehicles
일반주제명  
Signal processing
일반주제명  
Microscopy
일반주제명  
Etching
일반주제명  
Aluminum
일반주제명  
Transistors
일반주제명  
Heat conductivity
일반주제명  
Nitrogen
일반주제명  
Atomic physics
일반주제명  
Electrical engineering
일반주제명  
Electromagnetics
일반주제명  
Thermodynamics
일반주제명  
Transportation
기타저자  
Stanford University.
기본자료저록  
Dissertations Abstracts International. 86-05A.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■035    ▼a(MiAaPQ)Stanfordry886hk9765
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a620
■1001  ▼aNoshin,  Maliha.
■24510▼aPushing  the  Limit  of  Power  Density  in  Devices  with  Ultra-Wide  Bandgap  (All-AlGaN)  Heterostructures
■260    ▼a[Sl]▼bStanford  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a112  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-05,  Section:  A.
■500    ▼aAdvisor:  Chowdhury,  Srabanti.
■5021  ▼aThesis  (Ph.D.)--Stanford  University,  2024.
■520    ▼aThe  increasing  energy-consumption  due  to  increased  electrification  of  our  society  is  pushing  the  limit  of  today's  power-electronics  systems.  To  address  this  challenge,  the  development  of  higher  energy-density  power-electronic  devices  and  systems  will  be  a  key  enabler  of  energy  technologies  for  future  grid-electronics  and  data  centers.  To  this  end,  ultrawide-bandgap  (UWBG)  semiconducting  materials-like  aluminum  gallium  nitride  (AlGaN)  are  emerging  as  promising  candidates  for  high-power  electronics,  beyond  the  limitations  of  conventional  materials  like  silicon.In  this  thesis,  I  will  present  the  first  demonstration  of  nitrogen  (N)-polar  AlGaN  (Al  =  20%  to  73%)  heterostructure  based  high-electron  mobility  transistors.  First,  I  will  discuss  the  compositional  design  space  and  metal  organic  chemical  vapor  deposition  (MOCVD)-growth  of  such  heterostructures  to  realize  a  tunable  and  large  bandgap,  followed  by  the  materials  characterization.  I  will  simultaneously  explain  how  the  alloy-dominated  scattering  of  charge  carriers  in  such  material  system  can  control  its  two-dimensional  electron  gas  mobility.  Leveraging  these  fundamental  understanding,  I  will  demonstrate  the  realization  of  the  first  N-polar  AlGaN-channel  high  electron  mobility  transistors,  achieving  simultaneously  large  drive  current,  low  contact  resistance,  low  leakage  current  and  large  breakdown  voltage.  Finally,  I  will  illustrate  the  interface-driven  thermal  and  electrical  transport  and  their  temperature  dependence  in  such  heterostructures,  offering  important  insights  into  material-device  codesign,  electronic  device  functionality  and  reliability.  This  work  demonstrates  the  outstanding  potential  of  AlGaN-based  heterostructures  for  high-power  density  electronic  devices  and  systems.
■590    ▼aSchool  code:  0212.
■650  4▼aSilicon
■650  4▼aElectrons
■650  4▼aOptimization  techniques
■650  4▼aElectric  fields
■650  4▼aElectric  vehicles
■650  4▼aSignal  processing
■650  4▼aMicroscopy
■650  4▼aEtching
■650  4▼aAluminum
■650  4▼aTransistors
■650  4▼aHeat  conductivity
■650  4▼aNitrogen
■650  4▼aAtomic  physics
■650  4▼aElectrical  engineering
■650  4▼aElectromagnetics
■650  4▼aThermodynamics
■650  4▼aTransportation
■690    ▼a0800
■690    ▼a0748
■690    ▼a0544
■690    ▼a0607
■690    ▼a0348
■690    ▼a0709
■71020▼aStanford  University.
■7730  ▼tDissertations  Abstracts  International▼g86-05A.
■790    ▼a0212
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164893▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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