본문

서브메뉴

Anion Diffusion in Two-Dimensional Halide Perovskites- [electronic resource]
Anion Diffusion in Two-Dimensional Halide Perovskites - [electronic resource]
Anion Diffusion in Two-Dimensional Halide Perovskites- [electronic resource]

Detailed Information

자료유형  
 학위논문파일 국외
최종처리일시  
20240214101126
ISBN  
9798379842109
DDC  
629.8
저자명  
Akriti.
서명/저자  
Anion Diffusion in Two-Dimensional Halide Perovskites - [electronic resource]
발행사항  
[S.l.]: : Purdue University., 2022
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2022
형태사항  
1 online resource(139 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
주기사항  
Advisor: Dou, Letian.
학위논문주기  
Thesis (Ph.D.)--Purdue University, 2022.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약Technological advancements in electronics industry are driven by innovations in device fabrication techniques and development of novel materials. Halide perovskites are one of the latest additions to the semiconductor family. The performance of solid-state devices based on halide perovskites is now competing with other well-established semiconductors like silicon and gallium arsenide. However, the intrinsic instability of three-dimensional (3D) perovskites poses a great challenge in their widespread commercialization. The soft crystal lattice of hybrid halide perovskites facilitates anionic diffusion which impacts material stability, optoelectronic properties, and solid-state device performance.Two-dimensional (2D) halide perovskites with organic capping layers have been used for improving the extrinsic stability as well as suppressing intrinsic anionic diffusion. Nevertheless, a fundamental understanding of the role of compositional tuning, especially the impact of organic cations, in inhibiting anionic diffusion across the perovskite-ligand interface is missing. In our research, we first developed a library of atomically sharp and flat 2D heterostructures between two arbitrarily determined phase-pure halide perovskite single crystals. This platform was then used to perform a systematic investigation of anionic diffusion mechanism and quantify the impact of structural components on anionic inter-diffusion in halide perovskites.Stark differences were observed in anionic diffusion across 2D halide perovskite lateral and vertical heterostructures. Halide inter-diffusion in lateral heterostructures was found to be similar to the classical Fickian diffusion featuring continuous concentration profile evolution. However, vertical heterostructures show a "quantized" layer-by-layer diffusion behavior governed by a local free energy minimum and ion-blocking effects of the organic cations. For both lateral and vertical migrations, halide diffusion was found to be faster in perovskites with larger inorganic layer thickness. The increment becomes less apparent as the inorganic layer thickness increases, akin to the quantum confinement effect observed for band gaps. Furthermore, we found that bulkier and more rigid π-conjugated organic cations inhibit halide inter-diffusion much more effectively compared to short chain aliphatic cations. These results offer significant insights into the mechanism of anionic diffusion in 2D perovskites and provide a new materials platform for heterostructure assembly and device integration.
일반주제명  
Technological change.
일반주제명  
Semiconductors.
일반주제명  
Ions.
일반주제명  
Gallium arsenide.
일반주제명  
Light emitting diodes.
일반주제명  
Homogenization.
일반주제명  
Energy.
일반주제명  
Research & development--R&D.
일반주제명  
Photocatalysis.
일반주제명  
Thin films.
일반주제명  
Scanning electron microscopy.
일반주제명  
Transmission electron microscopy.
일반주제명  
Monte Carlo simulation.
일반주제명  
Iodine.
일반주제명  
Materials science.
일반주제명  
Lasers.
일반주제명  
Polymethyl methacrylate.
일반주제명  
Nanocrystals.
일반주제명  
Quantum dots.
일반주제명  
Analytical chemistry.
일반주제명  
Chemistry.
일반주제명  
Condensed matter physics.
일반주제명  
Electrical engineering.
일반주제명  
Optics.
일반주제명  
Physical chemistry.
일반주제명  
Physics.
일반주제명  
Polymer chemistry.
일반주제명  
Quantum physics.
기타저자  
Purdue University.
기본자료저록  
Dissertations Abstracts International. 85-01B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008240612s2022      us  |||||||||||||||c||eng  d
■001000016932899
■00520240214101126
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798379842109
■035    ▼a(MiAaPQ)AAI30505772
■035    ▼a(MiAaPQ)Purdue19521823
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a629.8
■1001  ▼aAkriti.
■24510▼aAnion  Diffusion  in  Two-Dimensional  Halide  Perovskites▼h[electronic  resource]
■260    ▼a[S.l.]:▼bPurdue  University.  ▼c2022
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2022
■300    ▼a1  online  resource(139  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-01,  Section:  B.
■500    ▼aAdvisor:  Dou,  Letian.
■5021  ▼aThesis  (Ph.D.)--Purdue  University,  2022.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aTechnological  advancements  in  electronics  industry  are  driven  by  innovations  in  device  fabrication  techniques  and  development  of  novel  materials.  Halide  perovskites  are  one  of  the  latest  additions  to  the  semiconductor  family.  The  performance  of  solid-state  devices  based  on  halide  perovskites  is  now  competing  with  other  well-established  semiconductors  like  silicon  and  gallium  arsenide.  However,  the  intrinsic  instability  of  three-dimensional  (3D)  perovskites  poses  a  great  challenge  in  their  widespread  commercialization.  The  soft  crystal  lattice  of  hybrid  halide  perovskites  facilitates  anionic  diffusion  which  impacts  material  stability,  optoelectronic  properties,  and  solid-state  device  performance.Two-dimensional  (2D)  halide  perovskites  with  organic  capping  layers  have  been  used  for  improving  the  extrinsic  stability  as  well  as  suppressing  intrinsic  anionic  diffusion.  Nevertheless,  a  fundamental  understanding  of  the  role  of  compositional  tuning,  especially  the  impact  of  organic  cations,  in  inhibiting  anionic  diffusion  across  the  perovskite-ligand  interface  is  missing.  In  our  research,  we  first  developed  a  library  of  atomically  sharp  and  flat  2D  heterostructures  between  two  arbitrarily  determined  phase-pure  halide  perovskite  single  crystals.  This  platform  was  then  used  to  perform  a  systematic  investigation  of  anionic  diffusion  mechanism  and  quantify  the  impact  of  structural  components  on  anionic  inter-diffusion  in  halide  perovskites.Stark  differences  were  observed  in  anionic  diffusion  across  2D  halide  perovskite  lateral  and  vertical  heterostructures.  Halide  inter-diffusion  in  lateral  heterostructures  was  found  to  be  similar  to  the  classical  Fickian  diffusion  featuring  continuous  concentration  profile  evolution.  However,  vertical  heterostructures  show  a  "quantized"  layer-by-layer  diffusion  behavior  governed  by  a  local  free  energy  minimum  and  ion-blocking  effects  of  the  organic  cations.  For  both  lateral  and  vertical  migrations,  halide  diffusion  was  found  to  be  faster  in  perovskites  with  larger  inorganic  layer  thickness.  The  increment  becomes  less  apparent  as  the  inorganic  layer  thickness  increases,  akin  to  the  quantum  confinement  effect  observed  for  band  gaps.  Furthermore,  we  found  that  bulkier  and  more  rigid  π-conjugated  organic  cations  inhibit  halide  inter-diffusion  much  more  effectively  compared  to  short  chain  aliphatic  cations.  These  results  offer  significant  insights  into  the  mechanism  of  anionic  diffusion  in  2D  perovskites  and  provide  a  new  materials  platform  for  heterostructure  assembly  and  device  integration.
■590    ▼aSchool  code:  0183.
■650  4▼aTechnological  change.
■650  4▼aSemiconductors.
■650  4▼aIons.
■650  4▼aGallium  arsenide.
■650  4▼aLight  emitting  diodes.
■650  4▼aHomogenization.
■650  4▼aEnergy.
■650  4▼aResearch  &  development--R&D.
■650  4▼aPhotocatalysis.
■650  4▼aThin  films.
■650  4▼aScanning  electron  microscopy.
■650  4▼aTransmission  electron  microscopy.
■650  4▼aMonte  Carlo  simulation.
■650  4▼aIodine.
■650  4▼aMaterials  science.
■650  4▼aLasers.
■650  4▼aPolymethyl  methacrylate.
■650  4▼aNanocrystals.
■650  4▼aQuantum  dots.
■650  4▼aAnalytical  chemistry.
■650  4▼aChemistry.
■650  4▼aCondensed  matter  physics.
■650  4▼aElectrical  engineering.
■650  4▼aOptics.
■650  4▼aPhysical  chemistry.
■650  4▼aPhysics.
■650  4▼aPolymer  chemistry.
■650  4▼aQuantum  physics.
■690    ▼a0791
■690    ▼a0794
■690    ▼a0486
■690    ▼a0485
■690    ▼a0611
■690    ▼a0544
■690    ▼a0752
■690    ▼a0494
■690    ▼a0605
■690    ▼a0495
■690    ▼a0599
■71020▼aPurdue  University.
■7730  ▼tDissertations  Abstracts  International▼g85-01B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0183
■791    ▼aPh.D.
■792    ▼a2022
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16932899▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

Preview

Export

ChatGPT Discussion

AI Recommended Related Books


    New Books MORE
    Statistics for the past 3 years. Go to brief

    Подробнее информация.

    • Бронирование
    • не существует
    • моя папка
    • Первый запрос зрения
    • Non-Book Loan Application
    • Nighttime Book Loan Application
    материал
    Reg No. Количество платежных Местоположение статус Ленд информации
    TF08228 전자도서 My Folder 부재도서신고 비도서대출신청

    * Бронирование доступны в заимствований книги. Чтобы сделать предварительный заказ, пожалуйста, нажмите кнопку бронирование

    Books borrowed together with this book

    Related Popular Books

    Available after logging in.