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Investigating the Impact of Small Molecule Aggregation on Polaron Generation in Polymer: Y6 Organic Bulk Heterojunctions Using Optical Spectroscopy
Investigating the Impact of Small Molecule Aggregation on Polaron Generation in Polymer: Y6 Organic Bulk Heterojunctions Using Optical Spectroscopy
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211153002
- ISBN
- 9798346389859
- DDC
- 620
- 저자명
- Yuan, Yue.
- 서명/저자
- Investigating the Impact of Small Molecule Aggregation on Polaron Generation in Polymer: Y6 Organic Bulk Heterojunctions Using Optical Spectroscopy
- 발행사항
- [Sl] : The Pennsylvania State University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 204 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-05, Section: B.
- 주기사항
- Advisor: Asbury, John B.
- 학위논문주기
- Thesis (Ph.D.)--The Pennsylvania State University, 2024.
- 초록/해제
- 요약Organic solar cells (OSCs) based on polymer donor and non-fullerene small molecule acceptor bulk heterojunctions have emerged as the leading candidates to replace the traditional inorganic solar cells for their flexibility, tailorability, and potential for low-cost manufacturing. Among the high performance OSCs, PM6:Y6 has gained a lot of attention in recent years because of its high power conversion efficiency (PCE) of over 15%. This extraordinary performance mainly comes from: 1, The complementary absorption of the donor and acceptor molecules. 2, The barrierless charge separation at the donor acceptor interfaces. Despite the rapid progress made in the organic photovoltaics (OPVs) field, a comprehensive understanding of how the materials morphology affects its optoelectronics properties like charge separation efficiency remains incomplete. Such information is essential for the future design of OPV molecules.In this dissertation, time-resolved mid-infrared (TRIR) spectroscopy is used to directly probe the polaron generation efficiency in a series of PM6:Y6 thin films with different donor acceptor weight ratios (DARs). The DAR induced Y6 aggregation change is monitored by photoluminescence spectroscopy and grazing incidence wide angle X-ray scattering. The similar trend between the polaron generation efficiency variation and the morphology variation against the DAR reveals the relation between molecular aggregation and charge separation. This work provides first direct experimental evidence for the aggregation effect on reducing the Coulomb attraction between the hole and electron in the charge transfers states and promoting charge separation.
- 일반주제명
- Silicon
- 일반주제명
- Electrodes
- 일반주제명
- Semiconductors
- 일반주제명
- Aggregates
- 일반주제명
- Voltammetry
- 일반주제명
- Thin films
- 일반주제명
- Advanced materials
- 일반주제명
- Annealing
- 일반주제명
- Polymers
- 일반주제명
- Nuclear energy
- 일반주제명
- Fourier transforms
- 일반주제명
- Cadmium
- 일반주제명
- Flexibility
- 일반주제명
- Indium
- 일반주제명
- Molecular structure
- 일반주제명
- Quantum dots
- 일반주제명
- Alternative energy
- 일반주제명
- Atmospheric sciences
- 일반주제명
- Condensed matter physics
- 일반주제명
- Materials science
- 일반주제명
- Mathematics
- 일반주제명
- Nuclear engineering
- 일반주제명
- Nuclear physics
- 일반주제명
- Polymer chemistry
- 일반주제명
- Quantum physics
- 기본자료저록
- Dissertations Abstracts International. 86-05B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■1001 ▼aYuan, Yue.
■24510▼aInvestigating the Impact of Small Molecule Aggregation on Polaron Generation in Polymer: Y6 Organic Bulk Heterojunctions Using Optical Spectroscopy
■260 ▼a[Sl]▼bThe Pennsylvania State University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a204 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-05, Section: B.
■500 ▼aAdvisor: Asbury, John B.
■5021 ▼aThesis (Ph.D.)--The Pennsylvania State University, 2024.
■520 ▼aOrganic solar cells (OSCs) based on polymer donor and non-fullerene small molecule acceptor bulk heterojunctions have emerged as the leading candidates to replace the traditional inorganic solar cells for their flexibility, tailorability, and potential for low-cost manufacturing. Among the high performance OSCs, PM6:Y6 has gained a lot of attention in recent years because of its high power conversion efficiency (PCE) of over 15%. This extraordinary performance mainly comes from: 1, The complementary absorption of the donor and acceptor molecules. 2, The barrierless charge separation at the donor acceptor interfaces. Despite the rapid progress made in the organic photovoltaics (OPVs) field, a comprehensive understanding of how the materials morphology affects its optoelectronics properties like charge separation efficiency remains incomplete. Such information is essential for the future design of OPV molecules.In this dissertation, time-resolved mid-infrared (TRIR) spectroscopy is used to directly probe the polaron generation efficiency in a series of PM6:Y6 thin films with different donor acceptor weight ratios (DARs). The DAR induced Y6 aggregation change is monitored by photoluminescence spectroscopy and grazing incidence wide angle X-ray scattering. The similar trend between the polaron generation efficiency variation and the morphology variation against the DAR reveals the relation between molecular aggregation and charge separation. This work provides first direct experimental evidence for the aggregation effect on reducing the Coulomb attraction between the hole and electron in the charge transfers states and promoting charge separation.
■590 ▼aSchool code: 0176.
■650 4▼aSilicon
■650 4▼aElectrodes
■650 4▼aSemiconductors
■650 4▼aAggregates
■650 4▼aVoltammetry
■650 4▼aThin films
■650 4▼aIndustrial plant emissions
■650 4▼aAdvanced materials
■650 4▼aAnnealing
■650 4▼aPolymers
■650 4▼aNuclear energy
■650 4▼aFourier transforms
■650 4▼aCadmium
■650 4▼aFlexibility
■650 4▼aIndium
■650 4▼aMolecular structure
■650 4▼aAlternative energy sources
■650 4▼aQuantum dots
■650 4▼aAlternative energy
■650 4▼aAtmospheric sciences
■650 4▼aCondensed matter physics
■650 4▼aMaterials science
■650 4▼aMathematics
■650 4▼aNuclear engineering
■650 4▼aNuclear physics
■650 4▼aPolymer chemistry
■650 4▼aQuantum physics
■690 ▼a0363
■690 ▼a0725
■690 ▼a0611
■690 ▼a0794
■690 ▼a0405
■690 ▼a0552
■690 ▼a0756
■690 ▼a0495
■690 ▼a0599
■71020▼aThe Pennsylvania State University.
■7730 ▼tDissertations Abstracts International▼g86-05B.
■790 ▼a0176
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164439▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


