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Exciton dissociation in poly-phenylene-vinylene derivative:perylenediimide and hexabenzocoronene derivative:perylenediimide blend systems

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Title: Exciton dissociation in poly-phenylene-vinylene derivative:perylenediimide and hexabenzocoronene derivative:perylenediimide blend systems
Authors: Im, C.1, Tian, W.1, Bässler, H.1 baessler@mailer.uni-marburg.de, Fechtenkötter, A.2, Watson, M.D.2, Müllen, K.2
Source: Synthetic Metals. Oct2003, Vol. 139 Issue 3, p683. 4p.
Subjects: Phenyl compounds, Semiconductor doping, Exciton theory, Photochemistry
Abstract: Steady state photoconduction both in a phenyl-substituted copolymeric poly-phenylene-vinylene (PhPPV) and in alkylated hexa-peri-hexabenzocoronene (HBC) doped by perylenediimide (PdI) at a broad range of dopant concentrations has been measured and compared to previous results [J. Chem. Phys. 117 (2002) 1395] on PhPPV doped by trinitrofluorenone (TNF). At relatively small concentration (<10 wt.%), the yield of the photogeneration is almost independent of the system and blend ratio because practically every primary excitation dissociates at a donor–acceptor site and the subsequent escape from the coulombic potential is virtually system-independent. At dopant concentrations >10 wt.%, the yield of that escape process increases by approximately two orders of magnitude explained by both shielding of the pair potential and the onset of percolative electron motion across the acceptor network. [Copyright &y& Elsevier]
Copyright of Synthetic Metals is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 10694924
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  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Synthetic+Metals%22&quot;&gt;Synthetic Metals&lt;/searchLink&gt;. Oct2003, Vol. 139 Issue 3, p683. 4p.
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  Data: &lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Phenyl+compounds%22&quot;&gt;Phenyl compounds&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Semiconductor+doping%22&quot;&gt;Semiconductor doping&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Exciton+theory%22&quot;&gt;Exciton theory&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Photochemistry%22&quot;&gt;Photochemistry&lt;/searchLink&gt;
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  Data: Steady state photoconduction both in a phenyl-substituted copolymeric poly-phenylene-vinylene (PhPPV) and in alkylated hexa-peri-hexabenzocoronene (HBC) doped by perylenediimide (PdI) at a broad range of dopant concentrations has been measured and compared to previous results [J. Chem. Phys. 117 (2002) 1395] on PhPPV doped by trinitrofluorenone (TNF). At relatively small concentration (&lt;10 wt.%), the yield of the photogeneration is almost independent of the system and blend ratio because practically every primary excitation dissociates at a donor–acceptor site and the subsequent escape from the coulombic potential is virtually system-independent. At dopant concentrations &gt;10 wt.%, the yield of that escape process increases by approximately two orders of magnitude explained by both shielding of the pair potential and the onset of percolative electron motion across the acceptor network. [Copyright &amp;y&amp; Elsevier]
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  Data: &lt;i&gt;Copyright of Synthetic Metals is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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        Value: 10.1016/S0379-6779(03)00255-8
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        Text: English
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        StartPage: 683
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      – SubjectFull: Phenyl compounds
        Type: general
      – SubjectFull: Semiconductor doping
        Type: general
      – SubjectFull: Exciton theory
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      – SubjectFull: Photochemistry
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      – TitleFull: Exciton dissociation in poly-phenylene-vinylene derivative:perylenediimide and hexabenzocoronene derivative:perylenediimide blend systems
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              Text: Oct2003
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              Y: 2003
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