1 Ocak 2022 Dergi makalesi Açık Erişim

Guvenc, C. Meric; Tunc, Ilknur; Balci, Sinan

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/231946</identifier>
  <creators>
    <creator>
      <creatorName>Guvenc, C. Meric</creatorName>
      <givenName>C. Meric</givenName>
      <familyName>Guvenc</familyName>
      <affiliation>Izmir Inst Technol, Dept Mat Sci &amp; Engn, TR-35430 Izmir, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Tunc, Ilknur</creatorName>
      <givenName>Ilknur</givenName>
      <familyName>Tunc</familyName>
      <affiliation>Univ Turkish Aeronaut Assoc, Dept Mech Engn, TR-06790 Ankara, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Balci, Sinan</creatorName>
      <givenName>Sinan</givenName>
      <familyName>Balci</familyName>
      <affiliation>Izmir Inst Technol, Dept Photon, TR-35430 Izmir, Turkey</affiliation>
    </creator>
  </creators>
  <titles>
    <title>L-2[Ga(X)Fa(1-X)Pbi(3)]Pbi4 (0 &lt;= X &lt;= 1) Ruddlesden-Popper Perovskite Nanocrystals For Solar Cells And Light-Emitting Diodes</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2022</publicationYear>
  <dates>
    <date dateType="Issued">2022-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/231946</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1021/acsanm.1c03727</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">The main challenges to overcome for colloidal 2D Ruddlesden-Popper (RP) organo-lead iodide perovskite nanocrystals (NCs) are phase instability and low photo-luminescence quantum yield (PLQY). Herein, we demonstrate colloidal synthesis of guanidinium (GA)-L-2[GAPbI(3)]PbI4, formamidinium (FA)-L-2[FAPbI(3)]PbI4, and GA and FA alloyed L-2[GA(0.5)FA(0.5)PbI(3)]PbI4 NCs without using polar or high boiling point nonpolar solvents. Importantly, we show that optical properties and phase stability of L-2[APbI(3)]PbI4 NCs can be affectively tuned by alloying with guanidinium and formamidinium cations. Additionally, the band gap of NCs can be rapidly engineered by bromide ion exchange in L-2[GA(x)FA(1-x)PbI(3)]PbI4 (0 = x = 1) NCs. Our approach produces a stable dispersion of L-2[FAPbI(3)]PbI4 NCs with 12.6% PLQY that is at least three times higher than the previously reported PLQY in the nanocrystals. Furthermore, L-2[GAPbI(3)]PbI4 and L-2[GA(0.5)FA(0.5)PbI(3)]PbI4 NC films exhibit improved ambient stability over 10 days, which is significantly higher than L-2[FAPbI(3)]PbI4 NC films, which transform to an undesired 1D phase within 6 days. The colloidally synthesized guanidinium- and formamidinium-based 2D RP organo-lead iodide perovskite NCs with improved stability and high PLQY demonstrated in this study may find applications in solar cells and light-emitting diodes. Therefore, large A-site cation-alloyed 2D RP perovskite NCs may provide a new way to rationalize high-performance and stable perovskite solar cells and light-emitting diodes.</description>
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