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Correlating Charge-Transfer State Lifetimes with Material Energetics in Polymer:Non-Fullerene Acceptor Organic Solar Cells.
Dong, Yifan; Cha, Hyojung; Bristow, Helen L; Lee, Jinho; Kumar, Aditi; Tuladhar, Pabitra Shakya; McCulloch, Iain; Bakulin, Artem A; Durrant, James R.
Afiliación
  • Dong Y; Department of Chemistry and Centre for Processable Electronics, Imperial College London, London, W12 0BZ, United Kingdom.
  • Cha H; Department of Hydrogen & Renewable Energy, Kyungpook National University, Daegu, 41566, Republic of Korea.
  • Bristow HL; Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford, OX1 3TA, United Kingdom.
  • Lee J; Department of Chemistry and Centre for Processable Electronics, Imperial College London, London, W12 0BZ, United Kingdom.
  • Kumar A; Department of Chemistry and Centre for Processable Electronics, Imperial College London, London, W12 0BZ, United Kingdom.
  • Tuladhar PS; Department of Chemistry and Centre for Processable Electronics, Imperial College London, London, W12 0BZ, United Kingdom.
  • McCulloch I; Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford, OX1 3TA, United Kingdom.
  • Bakulin AA; KAUST Solar Center (KSC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
  • Durrant JR; Department of Chemistry and Centre for Processable Electronics, Imperial College London, London, W12 0BZ, United Kingdom.
J Am Chem Soc ; 143(20): 7599-7603, 2021 May 26.
Article en En | MEDLINE | ID: mdl-33891817
Minimizing the energy offset between the lowest exciton and charge-transfer (CT) states is a widely employed strategy to suppress the energy loss (Eg/q - VOC) in polymer:non-fullerene acceptor (NFA) organic solar cells (OSCs). In this work, transient absorption spectroscopy is employed to determine CT state lifetimes in a series of low energy loss polymer:NFA blends. The CT state lifetime is observed to show an inverse energy gap law dependence and decreases as the energy loss is reduced. This behavior is assigned to increased mixing/hybridization between these CT states and shorter-lived singlet excitons of the lower gap component as the energy offset ΔECT-S1 is reduced. This study highlights how achieving longer exciton and CT state lifetimes has the potential for further enhancement of OSC efficiencies.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Am Chem Soc Año: 2021 Tipo del documento: Article País de afiliación: Reino Unido Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Am Chem Soc Año: 2021 Tipo del documento: Article País de afiliación: Reino Unido Pais de publicación: Estados Unidos