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2D Hexagonal Boron Nitride Based Processes for Flexible Electronics
2D Hexagonal Boron Nitride Based Processes for Flexible Electronics
2D Hexagonal Boron Nitride Based Processes for Flexible Electronics

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자료유형  
 학위논문 서양
최종처리일시  
20260209102934
ISBN  
9798265402172
DDC  
620
저자명  
Gujrati, Rajat.
서명/저자  
2D Hexagonal Boron Nitride Based Processes for Flexible Electronics
발행사항  
[Sl] : Georgia Institute of Technology, 2023
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2023
형태사항  
143 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
주기사항  
Advisor: Mora, Luis B.;Salvestrini, Jean Paul.
학위논문주기  
Thesis (Ph.D.)--Georgia Institute of Technology, 2023.
초록/해제  
요약This thesis focuses on advancing the field of flexible electronic devices by utilizing two-dimensional hexagonal boron nitride (2D h-BN) as a release layer. The methodology used in the thesis is the selective area growth (SAG) of III-N materials through quasi van der Waals (vdW) epitaxy on 2D h-BN. This approach is adopted to address and solve the state-of-the-art challenges associated with InGaN/GaN solar cells and micro-light emitting diodes (micro-LEDs).The pathway to achieving efficient InGaN/GaN solar cells is impeded by degradation of the crystalline quality of the InGaN layer beyond a certain critical thickness, the phase separation of InGaN alloy at the high indium content in it, and the presence of the strong polarization charges at the InGaN/GaN hetero-interface. To overcome these challenges we propose a novel design of InGaN/GaN solar cells which includes conformally grown p-GaN, by MBE at low temperature, on top of an InGaN Nano Pyramid (NP) absorber, grown by nano SAG. Further, by coupling this structure with the quasi van der Waals epitaxy on 2D h-BN, two new designs of solar cells (a) conformal NP on copper, and (b) free-standing NP, are proposed. The performance of these solar cells is evaluated by optical and electrical simulations and a complete fabrication process of these solar cells is presented.The primary challenge for micro-LED fabrication has been the lowered performance of tiny micro-LEDs caused by chemical etching that defines individual LEDs and the complexity and cost associated with the lift-off and transfer of these LEDs from sapphire substrates to suitable supports. In this thesis, for the first time, we report a demonstration of coupled vdW epitaxy and SAG, to fabricate micro-LEDs of various shapes down to ultra-tiny sizes of 1.4m. The selective area growth of multi-quantum wells LED heterostructures allows to obtain ultra smooth crystalline sidewalls and vdW epitaxy of 2D h-BN allows simple lift-off and transfer of micro-LEDs. We perform a complete fabrication process of micro-LEDs and its transfer to a flexible copper substrate. Finally, device performances of these high-brightness micro-LEDs are reported.
일반주제명  
Silicon
일반주제명  
Boron
일반주제명  
Organic chemicals
일반주제명  
Semiconductors
일반주제명  
Lasers
일반주제명  
Electric fields
일반주제명  
Symmetry
일반주제명  
Microscopy
일반주제명  
Chemical vapor deposition
일반주제명  
Light emitting diodes
일반주제명  
Aluminum
일반주제명  
Photovoltaic cells
일반주제명  
Copper
일반주제명  
Molecular beam epitaxy
일반주제명  
21st century
일반주제명  
Indium
일반주제명  
Electronics
일반주제명  
Transistors
일반주제명  
Thin films
일반주제명  
Atoms & subatomic particles
일반주제명  
Nitrogen
일반주제명  
Alternative energy
일반주제명  
Atomic physics
일반주제명  
Condensed matter physics
일반주제명  
Electrical engineering
일반주제명  
Materials science
일반주제명  
Optics
일반주제명  
Organic chemistry
일반주제명  
Electromagnetics
기타저자  
Georgia Institute of Technology.
기본자료저록  
Dissertations Abstracts International. 87-05B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aGujrati,  Rajat.
■24510▼a2D  Hexagonal  Boron  Nitride  Based  Processes  for  Flexible  Electronics
■260    ▼a[Sl]▼bGeorgia  Institute  of  Technology▼c2023
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2023
■300    ▼a143  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  B.
■500    ▼aAdvisor:  Mora,  Luis  B.;Salvestrini,  Jean  Paul.
■5021  ▼aThesis  (Ph.D.)--Georgia  Institute  of  Technology,  2023.
■520    ▼aThis  thesis  focuses  on  advancing  the  field  of  flexible  electronic  devices  by  utilizing  two-dimensional  hexagonal  boron  nitride  (2D  h-BN)  as  a  release  layer.  The  methodology  used  in  the  thesis  is  the  selective  area  growth  (SAG)  of  III-N  materials  through  quasi  van  der  Waals  (vdW)  epitaxy  on  2D  h-BN.  This  approach  is  adopted  to  address  and  solve  the  state-of-the-art  challenges  associated  with  InGaN/GaN  solar  cells  and  micro-light  emitting  diodes  (micro-LEDs).The  pathway  to  achieving  efficient  InGaN/GaN  solar  cells  is  impeded  by  degradation  of  the  crystalline  quality  of  the  InGaN  layer  beyond  a  certain  critical  thickness,  the  phase  separation  of  InGaN  alloy  at  the  high  indium  content  in  it,  and  the  presence  of  the  strong  polarization  charges  at  the  InGaN/GaN  hetero-interface.  To  overcome  these  challenges  we  propose  a  novel  design  of  InGaN/GaN  solar  cells  which  includes  conformally  grown  p-GaN,  by  MBE  at  low  temperature,  on  top  of  an  InGaN  Nano  Pyramid  (NP)  absorber,  grown  by  nano  SAG.  Further,  by  coupling  this  structure  with  the  quasi  van  der  Waals  epitaxy  on  2D  h-BN,  two  new  designs  of  solar  cells  (a)  conformal  NP  on  copper,  and  (b)  free-standing  NP,  are  proposed.  The  performance  of  these  solar  cells  is  evaluated  by  optical  and  electrical  simulations  and  a  complete  fabrication  process  of  these  solar  cells  is  presented.The  primary  challenge  for  micro-LED  fabrication  has  been  the  lowered  performance  of  tiny  micro-LEDs  caused  by  chemical  etching  that  defines  individual  LEDs  and  the  complexity  and  cost  associated  with  the  lift-off  and  transfer  of  these  LEDs  from  sapphire  substrates  to  suitable  supports.  In  this  thesis,  for  the  first  time,  we  report  a  demonstration  of  coupled  vdW  epitaxy  and  SAG,  to  fabricate  micro-LEDs  of  various  shapes  down  to  ultra-tiny  sizes  of  1.4m.  The  selective  area  growth  of  multi-quantum  wells  LED  heterostructures  allows  to  obtain  ultra  smooth  crystalline  sidewalls  and  vdW  epitaxy  of  2D  h-BN  allows  simple  lift-off  and  transfer  of  micro-LEDs.  We  perform  a  complete  fabrication  process  of  micro-LEDs  and  its  transfer  to  a  flexible  copper  substrate.  Finally,  device  performances  of  these  high-brightness  micro-LEDs  are  reported.
■590    ▼aSchool  code:  0078.
■650  4▼aSilicon
■650  4▼aBoron
■650  4▼aOrganic  chemicals
■650  4▼aSemiconductors
■650  4▼aLasers
■650  4▼aElectric  fields
■650  4▼aSymmetry
■650  4▼aMicroscopy
■650  4▼aChemical  vapor  deposition
■650  4▼aLight  emitting  diodes
■650  4▼aAluminum
■650  4▼aPhotovoltaic  cells
■650  4▼aCopper
■650  4▼aMolecular  beam  epitaxy
■650  4▼a21st  century
■650  4▼aIndium
■650  4▼aElectronics
■650  4▼aTransistors
■650  4▼aThin  films
■650  4▼aAtoms  &  subatomic  particles
■650  4▼aNitrogen
■650  4▼aAlternative  energy
■650  4▼aAtomic  physics
■650  4▼aCondensed  matter  physics
■650  4▼aElectrical  engineering
■650  4▼aMaterials  science
■650  4▼aOptics
■650  4▼aOrganic  chemistry
■650  4▼aElectromagnetics
■690    ▼a0363
■690    ▼a0748
■690    ▼a0611
■690    ▼a0544
■690    ▼a0794
■690    ▼a0752
■690    ▼a0490
■690    ▼a0607
■71020▼aGeorgia  Institute  of  Technology.
■7730  ▼tDissertations  Abstracts  International▼g87-05B.
■790    ▼a0078
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17366047▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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