Dataset Open Access

Photoluminescence dynamics in few-layer InSe

Venanzi, Tommaso; Arora, Himani; Winnerl, Stephan; Pashkin, Oleksiy; Chava, Phanish; Patane, Amalia; Kovalyuk, Zakhar; Kudrynskyi, Zakhar; Watanabe, Kenji; Taniguchi, Takashi; Erbe, Artur; Helm, Manfred; Schneider, Harald


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  <identifier identifierType="URL">https://rodare.hzdr.de/record/294</identifier>
  <creators>
    <creator>
      <creatorName>Venanzi, Tommaso</creatorName>
      <givenName>Tommaso</givenName>
      <familyName>Venanzi</familyName>
      <nameIdentifier nameIdentifierScheme="ORCID" schemeURI="http://orcid.org/">0000-0002-6446-7553</nameIdentifier>
      <affiliation>Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany</affiliation>
    </creator>
    <creator>
      <creatorName>Arora, Himani</creatorName>
      <givenName>Himani</givenName>
      <familyName>Arora</familyName>
      <nameIdentifier nameIdentifierScheme="ORCID" schemeURI="http://orcid.org/">0000-0003-3318-9877</nameIdentifier>
      <affiliation>Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany</affiliation>
    </creator>
    <creator>
      <creatorName>Winnerl, Stephan</creatorName>
      <givenName>Stephan</givenName>
      <familyName>Winnerl</familyName>
      <affiliation>Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany</affiliation>
    </creator>
    <creator>
      <creatorName>Pashkin, Oleksiy</creatorName>
      <givenName>Oleksiy</givenName>
      <familyName>Pashkin</familyName>
      <nameIdentifier nameIdentifierScheme="ORCID" schemeURI="http://orcid.org/">0000-0003-1309-6171</nameIdentifier>
      <affiliation>Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany</affiliation>
    </creator>
    <creator>
      <creatorName>Chava, Phanish</creatorName>
      <givenName>Phanish</givenName>
      <familyName>Chava</familyName>
      <affiliation>Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany</affiliation>
    </creator>
    <creator>
      <creatorName>Patane, Amalia</creatorName>
      <givenName>Amalia</givenName>
      <familyName>Patane</familyName>
      <affiliation>School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom</affiliation>
    </creator>
    <creator>
      <creatorName>Kovalyuk, Zakhar</creatorName>
      <givenName>Zakhar</givenName>
      <familyName>Kovalyuk</familyName>
      <affiliation>Institute for Problems of Materials Science, The National Academy of Sciences of Ukraine, Chernivtsi, Ukraine</affiliation>
    </creator>
    <creator>
      <creatorName>Kudrynskyi, Zakhar</creatorName>
      <givenName>Zakhar</givenName>
      <familyName>Kudrynskyi</familyName>
      <affiliation>School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom</affiliation>
    </creator>
    <creator>
      <creatorName>Watanabe, Kenji</creatorName>
      <givenName>Kenji</givenName>
      <familyName>Watanabe</familyName>
      <affiliation>National Institute for Material Science, 1-1 Namiki, Tsukuba 305-0044, Japan</affiliation>
    </creator>
    <creator>
      <creatorName>Taniguchi, Takashi</creatorName>
      <givenName>Takashi</givenName>
      <familyName>Taniguchi</familyName>
      <affiliation>National Institute for Material Science, 1-1 Namiki, Tsukuba 305-0044, Japan</affiliation>
    </creator>
    <creator>
      <creatorName>Erbe, Artur</creatorName>
      <givenName>Artur</givenName>
      <familyName>Erbe</familyName>
      <affiliation>Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany</affiliation>
    </creator>
    <creator>
      <creatorName>Helm, Manfred</creatorName>
      <givenName>Manfred</givenName>
      <familyName>Helm</familyName>
      <affiliation>Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany</affiliation>
    </creator>
    <creator>
      <creatorName>Schneider, Harald</creatorName>
      <givenName>Harald</givenName>
      <familyName>Schneider</familyName>
      <nameIdentifier nameIdentifierScheme="ORCID" schemeURI="http://orcid.org/">0000-0002-8060-8504</nameIdentifier>
      <affiliation>Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Photoluminescence dynamics in few-layer InSe</title>
  </titles>
  <publisher>Rodare</publisher>
  <publicationYear>2020</publicationYear>
  <subjects>
    <subject>2D semiconductors, time-resolved photoluminescence</subject>
  </subjects>
  <dates>
    <date dateType="Issued">2020-04-14</date>
  </dates>
  <language>en</language>
  <resourceType resourceTypeGeneral="Dataset"/>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://rodare.hzdr.de/record/294</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsIdenticalTo">https://www.hzdr.de/publications/Publ-30918</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1103/PhysRevMaterials.4.044001</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsPartOf">https://rodare.hzdr.de/communities/fwi</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsPartOf">https://rodare.hzdr.de/communities/rodare</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="https://creativecommons.org/licenses/by/1.0/legalcode">Creative Commons Attribution 1.0 Generic</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;We study the optical properties of thin flakes of InSe encapsulated in hexagonal boron nitride. Mores pecifically, we investigate the photoluminescence (PL) emission and its dependence on sample thickness and temperature. Through the analysis of the PL line shape, we discuss the relative weights of the exciton and electron-hole contributions. Thereafter we investigate the PL dynamics. Two contributions are distinguishable at low temperature: direct band-gap electron-hole and defect-assisted recombination. The two recombination processes have lifetimes of&amp;tau;1&amp;sim;8ns and&amp;tau;2&amp;sim;100 ns, respectively. The relative weights of the direct band-gap and defect-assisted contributions show a strong layer dependence due to the direct-to-indirect band-gap crossover. Electron-hole PL lifetime is limited by population transfer to lower-energy states and no dependence on the number of layers was observed. The lifetime of the defect-assisted recombination gets longer for thinner samples. Finally, we show that the PL lifetime decreases at high temperatures as a consequence of more efficient nonradiative recombinations.&lt;/p&gt;</description>
  </descriptions>
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