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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: Y...
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  
Industrial plant emissions
일반주제명  
Advanced materials
일반주제명  
Annealing
일반주제명  
Polymers
일반주제명  
Nuclear energy
일반주제명  
Fourier transforms
일반주제명  
Cadmium
일반주제명  
Flexibility
일반주제명  
Indium
일반주제명  
Molecular structure
일반주제명  
Alternative energy sources
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
기타저자  
The Pennsylvania State University.
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
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■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.

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