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Correlating the Hyb...
Correlating the Hybridization of Local-Exciton and Charge-Transfer States with Charge Generation in Organic Solar Cells
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- Qian, Deping (author)
- Fujian Normal Univ, Peoples R China; Straits Lab Flexible Elect SLoFE, Peoples R China; Imperial Coll London, England
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- Pratik, Saied Md (author)
- Univ Arizona, AZ 85721 USA
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- Liu, Qi (author)
- Shandong Univ, Peoples R China
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- Dong, Yifan (author)
- Imperial Coll London, England
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- Zhang, Rui (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Yu, Jianwei (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Gasparini, Nicola (author)
- Imperial Coll London, England
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- Wu, Jiaying (author)
- Imperial Coll London, England
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- Zhang, Tiankai (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Coropceanu, Veaceslav (author)
- Univ Arizona, AZ 85721 USA
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- Guo, Xia (author)
- Shandong Univ, Peoples R China
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- Zhang, Maojie (author)
- Shandong Univ, Peoples R China
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- Bredas, Jean-Luc (author)
- Univ Arizona, AZ 85721 USA
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- Gao, Feng (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Durrant, James R. (author)
- Imperial Coll London, England; Swansea Univ, Wales
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(creator_code:org_t)
- WILEY-V C H VERLAG GMBH, 2023
- 2023
- English.
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In: Advanced Energy Materials. - : WILEY-V C H VERLAG GMBH. - 1614-6832 .- 1614-6840. ; 13
- Related links:
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https://liu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- In organic solar cells with very small energetic-offset (& UDelta;ELE - CT), the charge-transfer (CT) and local-exciton (LE) states strongly interact via electronic hybridization and thermal population effects, suppressing the non-radiative recombination. Here, we investigated the impact of these effects on charge generation and recombination. In the blends of PTO2:C8IC and PTO2:Y6 with very small, ultra-fast CT state formation was observed, and assigned to direct photoexcitation resulting from strong hybridization of the LE and CT states (i.e., LE-CT intermixed states). These states in turn accelerate the recombination of both CT and charge separated (CS) states. Moreover, they can be significantly weakened by an external-electric field, which enhanced the yield of CT and CS states but attenuated the emission of the device. This study highlights that excessive LE-CT hybridization due to very low , whilst enabling direct and ultrafast charge transfer and increasing the proportion of radiative versus non-radiative recombination rates, comes at the expense of accelerating recombination losses competing with exciton-to-charge conversion process, resulting in a loss of photocurrent generation.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- charge generation; hybridization; non-radiative voltage loss; organic solar cells
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Qian, Deping
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Pratik, Saied Md
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Liu, Qi
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Dong, Yifan
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Zhang, Rui
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Yu, Jianwei
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show more...
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Gasparini, Nicol ...
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Wu, Jiaying
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Zhang, Tiankai
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Coropceanu, Veac ...
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Guo, Xia
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Zhang, Maojie
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Bredas, Jean-Luc
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Gao, Feng
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Durrant, James R ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
- Articles in the publication
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Advanced Energy ...
- By the university
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Linköping University