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Optoelectronic Devices For Manipulating Invisible Photons
Optoelectronic Devices For Manipulating Invisible Photons
Optoelectronic Devices For Manipulating Invisible Photons

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202104742
ISBN  
9798290650050
DDC  
547
저자명  
Hu, Manchen.
서명/저자  
Optoelectronic Devices For Manipulating Invisible Photons
발행사항  
[Sl] : Stanford University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
184 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-01, Section: B.
주기사항  
Advisor: Congreve, Dan.
학위논문주기  
Thesis (Ph.D.)--Stanford University, 2025.
초록/해제  
요약Controlling light beyond the visible spectrum-particularly in the ultraviolet (UV) and nearinfrared (NIR) regions-opens transformative opportunities across many different fields, including sterilization, 3D printing, biological imaging, optical communication, night vision and solar energy harvesting. This dissertation advances the fundamental understanding and technological implementation of optoelectronic devices that manipulate such "invisible" photons by leveraging solution-processed semiconductors, specifically metal halide perovskites and organic small molecules.In the first part of this work, we address the challenges in ultraviolet light-emitting diode (LED) technology by engineering wide-bandgap two-dimensional (2D) perovskite materials. Through halide composition tuning, interface engineering, and the introduction of water-based additives during film formation, we achieve highly uniform thin films with smaller crystal size. Additionally, when combined with a tailored dual electron transport layer architecture, these efforts yield electroluminescent devices with peak emission wavelengths below 400 nm and significantly improved external quantum efficiencies (EQEs). These devices represent one of the most efficient demonstrations of UV emission from solution-processed perovskite LEDs to date.In the second part, we turn to the complementary problem of photon upconversion, developing thin-film systems capable of converting NIR photons into visible emission via triplet-triplet annihilation. We introduce a bulk heterojunction (BHJ) design that enables efficient interfacial triplet sensitization using organic semiconductors. This architecture facilitates exciton diffusion and annihilation process, all within a single-step, scalable fabrication process. The resulting upconversion devices operate at low excitation intensities and can be deposited on both rigid and flexible substrates, supporting applications in energy harvesting, night vision, and anticounterfeiting.Taken together, this work outlines material design principles and device architectures that push the performance and manufacturability of optoelectronic systems operating outside the visible spectrum. It highlights the potential of solution-processable materials to redefine photon management at the nanoscale and establishes a foundation for future advances in ultraviolet and upconversion optoelectronics.
일반주제명  
Organic chemicals
일반주제명  
Writing
일반주제명  
Glass substrates
일반주제명  
Light emitting diodes
일반주제명  
Drinking water
일반주제명  
Counterfeiting
일반주제명  
Thin films
일반주제명  
Annealing
일반주제명  
Crystal structure
일반주제명  
Solar energy
일반주제명  
Additives
일반주제명  
Spectrum analysis
일반주제명  
Solvents
일반주제명  
3-D printers
일반주제명  
Energy transfer
일반주제명  
Nanocrystals
일반주제명  
Lamps
일반주제명  
Engineering
일반주제명  
Cadmium selenide
일반주제명  
Morphology
기타저자  
Stanford University.
기본자료저록  
Dissertations Abstracts International. 87-01B.
전자적 위치 및 접속  
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MARC

 008260126s2025        us                              c    eng  d
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■0820  ▼a547
■1001  ▼aHu,  Manchen.
■24510▼aOptoelectronic  Devices  For  Manipulating  Invisible  Photons
■260    ▼a[Sl]▼bStanford  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a184  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-01,  Section:  B.
■500    ▼aAdvisor:  Congreve,  Dan.
■5021  ▼aThesis  (Ph.D.)--Stanford  University,  2025.
■520    ▼aControlling  light  beyond  the  visible  spectrum-particularly  in  the  ultraviolet  (UV)  and  nearinfrared  (NIR)  regions-opens  transformative  opportunities  across  many  different  fields,  including  sterilization,  3D  printing,  biological  imaging,  optical  communication,  night  vision  and  solar  energy  harvesting.  This  dissertation  advances  the  fundamental  understanding  and  technological  implementation  of  optoelectronic  devices  that  manipulate  such  "invisible"  photons  by  leveraging  solution-processed  semiconductors,  specifically  metal  halide  perovskites  and  organic  small  molecules.In  the  first  part  of  this  work,  we  address  the  challenges  in  ultraviolet  light-emitting  diode  (LED)  technology  by  engineering  wide-bandgap  two-dimensional  (2D)  perovskite  materials.  Through  halide  composition  tuning,  interface  engineering,  and  the  introduction  of  water-based  additives  during  film  formation,  we  achieve  highly  uniform  thin  films  with  smaller  crystal  size.  Additionally,  when  combined  with  a  tailored  dual  electron  transport  layer  architecture,  these  efforts  yield  electroluminescent  devices  with  peak  emission  wavelengths  below  400  nm  and  significantly  improved  external  quantum  efficiencies  (EQEs).  These  devices  represent  one  of  the  most  efficient  demonstrations  of  UV  emission  from  solution-processed  perovskite  LEDs  to  date.In  the  second  part,  we  turn  to  the  complementary  problem  of  photon  upconversion,  developing  thin-film  systems  capable  of  converting  NIR  photons  into  visible  emission  via  triplet-triplet  annihilation.  We  introduce  a  bulk  heterojunction  (BHJ)  design  that  enables  efficient  interfacial  triplet  sensitization  using  organic  semiconductors.  This  architecture  facilitates  exciton  diffusion  and  annihilation  process,  all  within  a  single-step,  scalable  fabrication  process.  The  resulting  upconversion  devices  operate  at  low  excitation  intensities  and  can  be  deposited  on  both  rigid  and  flexible  substrates,  supporting  applications  in  energy  harvesting,  night  vision,  and  anticounterfeiting.Taken  together,  this  work  outlines  material  design  principles  and  device  architectures  that  push  the  performance  and  manufacturability  of  optoelectronic  systems  operating  outside  the  visible  spectrum.  It  highlights  the  potential  of  solution-processable  materials  to  redefine  photon  management  at  the  nanoscale  and  establishes  a  foundation  for  future  advances  in  ultraviolet  and  upconversion  optoelectronics.
■590    ▼aSchool  code:  0212.
■650  4▼aOrganic  chemicals
■650  4▼aWriting
■650  4▼aGlass  substrates
■650  4▼aLight  emitting  diodes
■650  4▼aDrinking  water
■650  4▼aCounterfeiting
■650  4▼aThin  films
■650  4▼aAnnealing
■650  4▼aCrystal  structure
■650  4▼aSolar  energy
■650  4▼aAdditives
■650  4▼aSpectrum  analysis
■650  4▼aSolvents
■650  4▼a3-D  printers
■650  4▼aEnergy  transfer
■650  4▼aNanocrystals
■650  4▼aLamps
■650  4▼aEngineering
■650  4▼aCadmium  selenide
■650  4▼aMorphology
■690    ▼a0287
■690    ▼a0537
■71020▼aStanford  University.
■7730  ▼tDissertations  Abstracts  International▼g87-01B.
■790    ▼a0212
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358721▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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