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Investigating Charge Transfer and Triplet Exciton Formation in Organic Single Crystals and Donor-Acceptor Single Co-Crystals
Investigating Charge Transfer and Triplet Exciton Formation in Organic Single Crystals and Donor-Acceptor Single Co-Crystals
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152820
- ISBN
- 9798346856603
- DDC
- 541
- 서명/저자
- Investigating Charge Transfer and Triplet Exciton Formation in Organic Single Crystals and Donor-Acceptor Single Co-Crystals
- 발행사항
- [Sl] : Northwestern University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 441 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-06, Section: B.
- 주기사항
- Advisor: Wasielewski, Michael R.
- 학위논문주기
- Thesis (Ph.D.)--Northwestern University, 2024.
- 초록/해제
- 요약Donor-acceptor (D-A) systems have emerged as valuable frameworks for studying charge transfer (CT) exciton dynamics. Single co-crystals featuring D-A pairs provide a controlled environment to investigate the formation and migration of CT excitons. The precise arrangement of donor and acceptor molecules within these co-crystals influences their electronic properties and charge transport behaviors. Understanding these interactions at a molecular level is critical for designing materials with high efficiency in solar energy conversion.This thesis delves into the intricate dynamics of SF and CT in various organic semiconductor systems, with a particular focus on PDI derivatives and D-A co-crystals. By employing advanced spectroscopic techniques and theoretical analyses, we aim to elucidate the fundamental processes governing exciton generation, separation, and migration in these materials. The findings from this research are expected to inform the design principles for next-generation photovoltaic devices, offering pathways to significantly enhance their efficiency and performance. In Chapter 2, we explore the impact of crystallinity on the SF rate and triplet exciton yield in PDI single crystals and polycrystalline thin films. Chapters 3 and 4 extend this investigation to fluorinated PDI and H-, C3-H-, and C3- terminated tetraphenoxy PDI derivatives, examining how molecular packing affects their photophysical properties. Chapters 5 and 6 focus on D-A systems, synthesizing and characterizing new covalently bound D-A crystals to understand their charge separation and recombination dynamics. Finally, Chapters 7, 8, and 9 provide a comprehensive analysis of donor-acceptor co-crystals based on flat, aromatic hydrogen carbon donor-acceptor assemblies (chapters 7 and 8) and NDIΔ-based donor-acceptor systems (chapter 9), highlighting the role of supramolecular structures in determining their electronic behaviors.The overarching goal of this thesis is to deepen our understanding of the fundamental mechanisms in SF and CT processes, thereby paving the way for the development of highly efficient organic solar cells and other optoelectronic devices. Through a combination of experimental and theoretical approaches, we aim to contribute valuable insights into the design and optimization of organic semiconductors for energy conversion applications.
- 일반주제명
- Physical chemistry
- 일반주제명
- Organic chemistry
- 일반주제명
- Materials science
- 키워드
- Crystallography
- 키워드
- Donor-acceptor
- 기타저자
- Northwestern University Chemistry
- 기본자료저록
- Dissertations Abstracts International. 86-06B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■007cr#unu||||||||
■020 ▼a9798346856603
■035 ▼a(MiAaPQ)AAI31559287
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a541
■1001 ▼aWilliams, Malik Leon.▼0(orcid)0000-0003-2835-4946
■24510▼aInvestigating Charge Transfer and Triplet Exciton Formation in Organic Single Crystals and Donor-Acceptor Single Co-Crystals
■260 ▼a[Sl]▼bNorthwestern University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a441 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-06, Section: B.
■500 ▼aAdvisor: Wasielewski, Michael R.
■5021 ▼aThesis (Ph.D.)--Northwestern University, 2024.
■520 ▼aDonor-acceptor (D-A) systems have emerged as valuable frameworks for studying charge transfer (CT) exciton dynamics. Single co-crystals featuring D-A pairs provide a controlled environment to investigate the formation and migration of CT excitons. The precise arrangement of donor and acceptor molecules within these co-crystals influences their electronic properties and charge transport behaviors. Understanding these interactions at a molecular level is critical for designing materials with high efficiency in solar energy conversion.This thesis delves into the intricate dynamics of SF and CT in various organic semiconductor systems, with a particular focus on PDI derivatives and D-A co-crystals. By employing advanced spectroscopic techniques and theoretical analyses, we aim to elucidate the fundamental processes governing exciton generation, separation, and migration in these materials. The findings from this research are expected to inform the design principles for next-generation photovoltaic devices, offering pathways to significantly enhance their efficiency and performance. In Chapter 2, we explore the impact of crystallinity on the SF rate and triplet exciton yield in PDI single crystals and polycrystalline thin films. Chapters 3 and 4 extend this investigation to fluorinated PDI and H-, C3-H-, and C3- terminated tetraphenoxy PDI derivatives, examining how molecular packing affects their photophysical properties. Chapters 5 and 6 focus on D-A systems, synthesizing and characterizing new covalently bound D-A crystals to understand their charge separation and recombination dynamics. Finally, Chapters 7, 8, and 9 provide a comprehensive analysis of donor-acceptor co-crystals based on flat, aromatic hydrogen carbon donor-acceptor assemblies (chapters 7 and 8) and NDIΔ-based donor-acceptor systems (chapter 9), highlighting the role of supramolecular structures in determining their electronic behaviors.The overarching goal of this thesis is to deepen our understanding of the fundamental mechanisms in SF and CT processes, thereby paving the way for the development of highly efficient organic solar cells and other optoelectronic devices. Through a combination of experimental and theoretical approaches, we aim to contribute valuable insights into the design and optimization of organic semiconductors for energy conversion applications.
■590 ▼aSchool code: 0163.
■650 4▼aPhysical chemistry
■650 4▼aOrganic chemistry
■650 4▼aMaterials science
■653 ▼aCrystallography
■653 ▼aTransient absorption microscopy
■653 ▼aDonor-acceptor
■653 ▼aSemiconductor systems
■653 ▼aSolar energy conversion
■690 ▼a0494
■690 ▼a0794
■690 ▼a0490
■71020▼aNorthwestern University▼bChemistry.
■7730 ▼tDissertations Abstracts International▼g86-06B.
■790 ▼a0163
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164009▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
