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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
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202104742
■006m o d
■007cr#unu||||||||
■020 ▼a9798290650050
■035 ▼a(MiAaPQ)AAI32149714
■035 ▼a(MiAaPQ)Stanfordrm880wk6723
■040 ▼aMiAaPQ▼cMiAaPQ
■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.


