<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>6742</id>
    <completedYear/>
    <publishedYear>2011</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2012-01-17</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Cliff-like conduction band offset and KCN-induced recombination barrier enhancement at the CdS/Cu2ZnSnS4 thin-film solar cell heterojunction</title>
    <abstract language="eng">The electronic structure of the CdS/Cu2ZnSnS4 (CZTS) heterojunction was investigated by direct and inverse photoemission. The effects of a KCN etch of the CZTS absorber prior to CdS deposition on the band alignment at the respective interface were studied. We find a “cliff”-like conduction band offset at the CdS/CZTS interface independent of absorber pretreatment and a significant etch-induced enhancement of the energetic barrier for charge carrier recombination across the CdS/CZTS interface.</abstract>
    <enrichment key="UBICOIdent">007926</enrichment>
    <enrichment key="UBICOquelle">Applied physics letters  99(2011)222105, 0003-6951</enrichment>
    <author>
      <firstName>Marcus</firstName>
      <lastName>Bär</lastName>
    </author>
    <submitter>
      <firstName>...</firstName>
      <lastName>Administrator</lastName>
    </submitter>
    <author>
      <firstName>Björn-Arvid</firstName>
      <lastName>Schubert</lastName>
    </author>
    <author>
      <firstName>Björn</firstName>
      <lastName>Marsen</lastName>
    </author>
    <author>
      <firstName>Regan G.</firstName>
      <lastName>Wilks</lastName>
    </author>
    <author>
      <firstName>Sujitra</firstName>
      <lastName>Pookpanratana</lastName>
    </author>
    <author>
      <firstName>Monika</firstName>
      <lastName>Blum</lastName>
    </author>
    <author>
      <firstName>Stefan</firstName>
      <lastName>Krause</lastName>
    </author>
    <author>
      <firstName>Thomas</firstName>
      <lastName>Unold</lastName>
    </author>
    <author>
      <firstName>Wan Li</firstName>
      <lastName>Yang</lastName>
    </author>
    <author>
      <firstName>Lothar</firstName>
      <lastName>Weinhardt</lastName>
    </author>
    <author>
      <firstName>Clemens</firstName>
      <lastName>Heske</lastName>
    </author>
    <author>
      <firstName>Hans-Werner</firstName>
      <lastName>Schock</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>kesterite</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>thin-film solar cells</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>energy band alignment</value>
    </subject>
    <collection role="old_institute" number="01002">JP Photovoltaik</collection>
    <collection role="institutes" number="1523">JP Photovoltaik</collection>
  </doc>
  <doc>
    <id>6743</id>
    <completedYear/>
    <publishedYear>2011</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2012-01-17</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Impact of KCN etching on the chemical and electronic surface structure of Cu2ZnSnS4 thin-film solar cell absorbers</title>
    <abstract language="eng">The chemical and electronic surface structure of Cu2ZnSnS4 thin-film solar cell absorbers has been investigated by direct and inverse photoemission. Particular emphasis was placed on the impact of KCN etching, which significantly alters the surface composition and is best explained by a preferred etching of Cu and, to a lesser degree, Sn. As a consequence the surface band gap increased from (1.53 +/- 0.15) eV, which agrees with optically derived bulk band gap values, to (1.91 +/- 0.15) ev.</abstract>
    <enrichment key="UBICOIdent">007927</enrichment>
    <enrichment key="UBICOquelle">Applied physics letters  99(2011)152111, 0003-6951</enrichment>
    <author>
      <firstName>Marcus</firstName>
      <lastName>Bär</lastName>
    </author>
    <submitter>
      <firstName>...</firstName>
      <lastName>Administrator</lastName>
    </submitter>
    <author>
      <firstName>Björn-Arvid</firstName>
      <lastName>Schubert</lastName>
    </author>
    <author>
      <firstName>Björn</firstName>
      <lastName>Marsen</lastName>
    </author>
    <author>
      <firstName>Stefan</firstName>
      <lastName>Krause</lastName>
    </author>
    <author>
      <firstName>Sujitra</firstName>
      <lastName>Pookpanratana</lastName>
    </author>
    <author>
      <firstName>Thomas</firstName>
      <lastName>Unold</lastName>
    </author>
    <author>
      <firstName>Lothar</firstName>
      <lastName>Weinhardt</lastName>
    </author>
    <author>
      <firstName>Clemens</firstName>
      <lastName>Heske</lastName>
    </author>
    <author>
      <firstName>Hans-Werner</firstName>
      <lastName>Schock</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>kesterite</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>thin-film solar cells</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>electronic surface structure</value>
    </subject>
    <collection role="old_institute" number="01002">JP Photovoltaik</collection>
    <collection role="institutes" number="1523">JP Photovoltaik</collection>
  </doc>
</export-example>
