Structural properties of the active layer of discotic hexabenzocoronene/perylene diimide bulk hetero junction photovoltaic devices : The role of alkyl side chain length

Al-Hussein, Mahmoud; Hesse, Holger C.; Weickert, Jonas; Dössel, Lukas; Feng, Xinliang; Müllen, Klaus; Schmidt-Mende, Lukas

Structural properties of the active layer of discotic hexabenzocoronene/perylene diimide bulk hetero junction photovoltaic devices : The role of alkyl side chain length

Dateien

Al-Hussein_Structural properties.pdfGröße: 3.83 MBDownloads: 364

Datum

2011

Autor:innen

Al-Hussein, Mahmoud

Hesse, Holger C.

Weickert, Jonas

Dössel, Lukas

Feng, Xinliang

Müllen, Klaus

Schmidt-Mende, Lukas

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Thin Solid Films. 2011, 520(1), pp. 307-313. ISSN 0040-6090. Available under: doi: 10.1016/j.tsf.2011.06.044

Zusammenfassung

We investigate thin blend films of phenyl-substituted hexa-peri-hexabenzocoronenes (HBC) with various alkyl side chain lengths ((CH2)n, n=6, 8, 12 and 16)/perylenediimide (PDI). These blends constitute the active layers in bulk-hetero junction organic solar cells we studied recently [1]. Their structural properties are studied by both scanning electron microscopy and X-ray diffraction measurements. The results support the evidence for the formation of HBC donor–PDI acceptor complexes in all blends regardless of the side chain length of the HBC molecule. These complexes are packed into a layered structure parallel to the substrate for short side chain HBC molecules (n=6 and 8). The layered structure is disrupted by increasing the side chain length of the HBC molecule and eventually a disordered structure is formed for long side chains (nN12). We attribute this behavior to the size difference between the aromatic parts of the HBC and PDI molecules. For short side chains, the size difference results in a room for the side chains of the two molecules to fill in the space around the aromatic cores. For long side chains (nN12), the empty space will not be enough to accommodate this increase, leading to the disruption of the layered structure and a rather disordered structure is formed. Our results highlight the importance of the donor–acceptor interaction in a bulk heterojunction active layer as well as the geometry of the two molecules and their role in determining the structure of the active layer and thus their photovoltaic performance.

Fachgebiet (DDC)

530 Physik

Schlagwörter

Organic solar cells, Bulk-heterojunction, Discotic liquid crystal, Active layer morphology, Scanning electron microscopy, X-ray diffraction

Zitieren

ISO 690

AL-HUSSEIN, Mahmoud, Holger C. HESSE, Jonas WEICKERT, Lukas DÖSSEL, Xinliang FENG, Klaus MÜLLEN, Lukas SCHMIDT-MENDE, 2011. Structural properties of the active layer of discotic hexabenzocoronene/perylene diimide bulk hetero junction photovoltaic devices : The role of alkyl side chain length. In: Thin Solid Films. 2011, 520(1), pp. 307-313. ISSN 0040-6090. Available under: doi: 10.1016/j.tsf.2011.06.044

BibTex

@article{AlHussein2011Struc-17926,
  year={2011},
  doi={10.1016/j.tsf.2011.06.044},
  title={Structural properties of the active layer of discotic hexabenzocoronene/perylene diimide bulk hetero junction photovoltaic devices : The role of alkyl side chain length},
  number={1},
  volume={520},
  issn={0040-6090},
  journal={Thin Solid Films},
  pages={307--313},
  author={Al-Hussein, Mahmoud and Hesse, Holger C. and Weickert, Jonas and Dössel, Lukas and Feng, Xinliang and Müllen, Klaus and Schmidt-Mende, Lukas}
}

RDF

<rdf:RDF
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:bibo="http://purl.org/ontology/bibo/"
    xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:void="http://rdfs.org/ns/void#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="https://kops.uni-konstanz.de/server/rdf/resource/123456789/17926">
    <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/>
    <dc:contributor>Müllen, Klaus</dc:contributor>
    <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/17926/1/Al-Hussein_Structural%20properties.pdf"/>
    <dc:contributor>Dössel, Lukas</dc:contributor>
    <dc:creator>Müllen, Klaus</dc:creator>
    <dc:creator>Al-Hussein, Mahmoud</dc:creator>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dc:contributor>Feng, Xinliang</dc:contributor>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2012-03-13T09:18:17Z</dc:date>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2012-03-13T09:18:17Z</dcterms:available>
    <dc:language>eng</dc:language>
    <dc:rights>terms-of-use</dc:rights>
    <dcterms:bibliographicCitation>First publ. in: Thin Solid Films ; 520 (2011), 1. - pp. 307-313</dcterms:bibliographicCitation>
    <dc:creator>Schmidt-Mende, Lukas</dc:creator>
    <dc:creator>Weickert, Jonas</dc:creator>
    <dc:creator>Hesse, Holger C.</dc:creator>
    <dc:contributor>Weickert, Jonas</dc:contributor>
    <dc:creator>Dössel, Lukas</dc:creator>
    <dc:contributor>Schmidt-Mende, Lukas</dc:contributor>
    <dcterms:title>Structural properties of the active layer of discotic hexabenzocoronene/perylene diimide bulk hetero junction photovoltaic devices : The role of alkyl side chain length</dcterms:title>
    <dc:contributor>Al-Hussein, Mahmoud</dc:contributor>
    <dcterms:issued>2011</dcterms:issued>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/17926/1/Al-Hussein_Structural%20properties.pdf"/>
    <dc:creator>Feng, Xinliang</dc:creator>
    <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/17926"/>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dcterms:abstract xml:lang="eng">We investigate thin blend films of phenyl-substituted hexa-peri-hexabenzocoronenes (HBC) with various alkyl side chain lengths ((CH2)n, n=6, 8, 12 and 16)/perylenediimide (PDI). These blends constitute the active layers in bulk-hetero junction organic solar cells we studied recently [1]. Their structural properties are studied by both scanning electron microscopy and X-ray diffraction measurements. The results support the evidence for the formation of HBC donor–PDI acceptor complexes in all blends regardless of the side chain length of the HBC molecule. These complexes are packed into a layered structure parallel to the substrate for short side chain HBC molecules (n=6 and 8). The layered structure is disrupted by increasing the side chain length of the HBC molecule and eventually a disordered structure is formed for long side chains (nN12). We attribute this behavior to the size difference between the aromatic parts of the HBC and PDI molecules. For short side chains, the size difference results in a room for the side chains of the two molecules to fill in the space around the aromatic cores. For long side chains (nN12), the empty space will not be enough to accommodate this increase, leading to the disruption of the layered structure and a rather disordered structure is formed. Our results highlight the importance of the donor–acceptor interaction in a bulk heterojunction active layer as well as the geometry of the two molecules and their role in determining the structure of the active layer and thus their photovoltaic performance.</dcterms:abstract>
    <dc:contributor>Hesse, Holger C.</dc:contributor>
  </rdf:Description>
</rdf:RDF>

Universitätsbibliographie

Ja