1 Ocak 2020 Dergi makalesi Açık Erişim

Usta, Hakan; Alimli, Dilek; Ozdemir, Resul; Tekin, Emine; Alkan, Fahri; Kacar, Rifat; Altas, Ahu Galen; Dabak, Salih; Gurek, Ayse Gul; Mutlugun, Evren; Yazici, Ahmet Faruk; Can, Ayse

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/89153</identifier>
  <creators>
    <creator>
      <creatorName>Usta, Hakan</creatorName>
      <givenName>Hakan</givenName>
      <familyName>Usta</familyName>
      <affiliation>Abdullah Gul Univ, Dept Mat Sci &amp; Nanotechnol Engn, TR-38080 Kayseri, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Alimli, Dilek</creatorName>
      <givenName>Dilek</givenName>
      <familyName>Alimli</familyName>
      <affiliation>Gebze Tech Univ, Dept Chem, TR-41400 Kocaeli, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Ozdemir, Resul</creatorName>
      <givenName>Resul</givenName>
      <familyName>Ozdemir</familyName>
      <affiliation>Abdullah Gul Univ, Dept Mat Sci &amp; Nanotechnol Engn, TR-38080 Kayseri, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Tekin, Emine</creatorName>
      <givenName>Emine</givenName>
      <familyName>Tekin</familyName>
      <affiliation>Sci &amp; Technol Res Council Turkey TUBITAK, Marmara Res Ctr MAM, TR-41470 Kocaeli, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Alkan, Fahri</creatorName>
      <givenName>Fahri</givenName>
      <familyName>Alkan</familyName>
      <affiliation>Abdullah Gul Univ, Dept Mat Sci &amp; Nanotechnol Engn, TR-38080 Kayseri, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Kacar, Rifat</creatorName>
      <givenName>Rifat</givenName>
      <familyName>Kacar</familyName>
      <affiliation>Sci &amp; Technol Res Council Turkey TUBITAK, Marmara Res Ctr MAM, TR-41470 Kocaeli, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Altas, Ahu Galen</creatorName>
      <givenName>Ahu Galen</givenName>
      <familyName>Altas</familyName>
      <affiliation>Sci &amp; Technol Res Council Turkey TUBITAK, Marmara Res Ctr MAM, TR-41470 Kocaeli, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Dabak, Salih</creatorName>
      <givenName>Salih</givenName>
      <familyName>Dabak</familyName>
      <affiliation>Sci &amp; Technol Res Council Turkey TUBITAK, Marmara Res Ctr MAM, TR-41470 Kocaeli, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Gurek, Ayse Gul</creatorName>
      <givenName>Ayse Gul</givenName>
      <familyName>Gurek</familyName>
      <affiliation>Gebze Tech Univ, Dept Chem, TR-41400 Kocaeli, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Mutlugun, Evren</creatorName>
      <givenName>Evren</givenName>
      <familyName>Mutlugun</familyName>
      <affiliation>Abdullah Gul Univ, Dept Elect &amp; Elect Engn, TR-38080 Kayseri, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Yazici, Ahmet Faruk</creatorName>
      <givenName>Ahmet Faruk</givenName>
      <familyName>Yazici</familyName>
      <affiliation>Abdullah Gul Univ, Dept Mat Sci &amp; Nanotechnol Engn, TR-38080 Kayseri, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Can, Ayse</creatorName>
      <givenName>Ayse</givenName>
      <familyName>Can</familyName>
      <affiliation>Abdullah Gul Univ, Dept Mat Sci &amp; Nanotechnol Engn, TR-38080 Kayseri, Turkey</affiliation>
    </creator>
  </creators>
  <titles>
    <title>A Hybridized Local And Charge Transfer Excited State For Solution-Processed Non-Doped Green Electroluminescence Based On Oligo(P-Phenyleneethynylene)</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2020</publicationYear>
  <dates>
    <date dateType="Issued">2020-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/89153</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1039/d0tc01266a</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">We herein report a new highly efficient green emissive hot-exciton molecule, 1,4-bis((4'-diphenylamino3-cyano-[1,1'-biphenyl]-4-yl)ethynyl)-2,5-bis(2-ethylhexyloxy)benzene (2EHO-TPA-CNPE) that consists of an extended D'-pi'-A-pi-D-pi-A-pi'-D' molecular p-system with diphenylamino end units (D') and ethynylene/phenylene spacers (pi/pi'). The new molecule exhibits high photoluminescence (PL) quantum efficiencies (Phi(PL) = 0.95 (solution) and 0.45 (spin-coated neat thin-film)), and a strong PL solvatochromic behavior revealing significant changes in excited state energies/characteristics (locally excited (LE) -&amp;gt; hybridized local and charge transfer (HLCT) - charge-transfer (CT)) depending on solvent polarity. Highly efficient (radiative exciton yield (eta(r)) = 50-59% &amp;gt;&amp;gt; 25%) green-emitting OLEDs were fabricated in a conventional device architecture by employing (non-)doped thin-films reaching a maximum current efficiency (CEmax) of 12.0 cd A(-1) and a maximum external quantum efficiency (EQE(max)) of 5.5%. The emission profile of the non-doped OLED has CIE 1976 (u', v') chromaticity coordinates of (0.10, 0.55) corresponding to a night vision imaging system (NVIS) compatible Green A region. 2EHO-TPA-CNPE-based OLED devices of industrial relevance were also fabricated by ink-jet printing the emissive layer and by fabricating an inverted architecture, which possessed respectable device performances of 2.4-6.1 cd A(-1). The solid-state solvation effect in OLED devices yields HLCT electronic behavior resulting in high Zr's, which is confirmed by TDDFT to originate from energetically/spatially favorable reverse intersystem crossings (RISCs) (T-2/3 -&amp;gt; S-1). As a unique observation, delayed fluorescence due to this RISC was evident in the PL decay lifetime measurement with a ns-scale lifetime of similar to 10 ns. These results clearly allow a better understanding of the structure-photophysical property-electroluminescence relationships in this new class of oligo(p-phenyleneethynylene)-based hot-exciton molecules, and it could open up new opportunities for high-performance solution-processed optoelectronic/sensing applications.</description>
  </descriptions>
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