Journal article Open Access

In-plane Aligned Colloidal 2D WS2 Nanofakes for SolutionProcessable Thin Films with High Planar Conductivity

Mastria, Rosanna


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  <identifier identifierType="URL">https://zenodo.org/record/3836121</identifier>
  <creators>
    <creator>
      <creatorName>Mastria, Rosanna</creatorName>
      <givenName>Rosanna</givenName>
      <familyName>Mastria</familyName>
      <affiliation>CNR</affiliation>
    </creator>
  </creators>
  <titles>
    <title>In-plane Aligned Colloidal 2D WS2 Nanofakes for SolutionProcessable Thin Films with High Planar Conductivity</title>
  </titles>
  <publisher>Zenodo</publisher>
  <publicationYear>2020</publicationYear>
  <dates>
    <date dateType="Issued">2020-05-20</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://zenodo.org/record/3836121</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1038/s41598-019-45192-1</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsPartOf">https://zenodo.org/communities/qsort</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="https://creativecommons.org/licenses/by/4.0/legalcode">Creative Commons Attribution 4.0 International</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;Two-dimensional transition-metal dichalcolgenides (2D-TMDs) are among the most intriguing materials for next-generation electronic and optoelectronic devices. Albeit still at the embryonic stage, building thin films by manipulating and stacking preformed 2D nanosheets is now emerging as a practical and cost-effective bottom-up paradigm to obtain excellent electrical properties over large areas. Herein, we exploit the ultrathin morphology and outstanding solution stability of 2D WS&lt;sub&gt;2&lt;/sub&gt;&amp;nbsp;colloidal nanocrystals to make thin films of TMDs assembled on a millimetre scale by a layer-by-layer deposition approach. We found that a room-temperature surface treatment with a superacid, performed with the precise scope of removing the native insulating surfactants, promotes in-plane assembly of the colloidal WS&lt;sub&gt;2&lt;/sub&gt;&amp;nbsp;nanoflakes into stacks parallel to the substrate, along with healing of sulphur vacancies in the lattice that are detrimental to electrical conductivity. The as-obtained 2D WS&lt;sub&gt;2&lt;/sub&gt;&amp;nbsp;thin films, characterized by a smooth and compact morphology, feature a high planar conductivity of up to 1 &amp;mu;S, comparable to the values reported for epitaxially grown WS&lt;sub&gt;2&lt;/sub&gt;&amp;nbsp;monolayers, and enable photocurrent generation upon light irradiation over a wide range of visible to near-infrared frequencies.&lt;/p&gt;</description>
  </descriptions>
  <fundingReferences>
    <fundingReference>
      <funderName>European Commission</funderName>
      <funderIdentifier funderIdentifierType="Crossref Funder ID">10.13039/501100000780</funderIdentifier>
      <awardNumber awardURI="info:eu-repo/grantAgreement/EC/H2020/766970/">766970</awardNumber>
      <awardTitle>QUANTUM SORTER</awardTitle>
    </fundingReference>
    <fundingReference>
      <funderName>European Commission</funderName>
      <funderIdentifier funderIdentifierType="Crossref Funder ID">10.13039/501100000780</funderIdentifier>
      <awardNumber awardURI="info:eu-repo/grantAgreement/EC/H2020/696656/">696656</awardNumber>
      <awardTitle>Graphene-based disruptive technologies</awardTitle>
    </fundingReference>
  </fundingReferences>
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