View in EDS

Back contact formation in thin cadmium telluride solar cells

Saved in:
Bibliographic Details
Title: Back contact formation in thin cadmium telluride solar cells
Authors: Hädrich, M. mathias.haedrich@uni-jena.de, Heisler, C., Reislöhner, U., Kraft, C., Metzner, H.
Source: Thin Solid Films. Aug2011, Vol. 519 Issue 21, p7156-7159. 4p.
Subjects: Thin films, Tellurides, Solar cells, Schottky barrier diodes, Thickness measurement, Energy bands, Simulation methods & models, Phase diagrams
Abstract: Abstract: We present a model describing the undesired roll-over which is a well-known phenomenon in the current–voltage characteristics of CdTe solar cells. Therein, the roll-over is ascribed to a Schottky barrier at the back contact which is effective as a reverse diode. The formation of this barrier is investigated depending on the CdTe absorber thickness as well as on the employed back contact metal. Computer simulations of the energy band diagram reveal that the back contact barrier can be reduced and even eliminated for sufficiently thin absorbers. The reason is the spatial overlap between the space-charge regions of the p–n heterojunction with the one of the back contact. This behaviour correlates with experimental current–voltage data of solar cells with a simple gold back contact. In the latter, the roll-over is considerable for absorbers with 3 to 5μm thickness, diminishes when the absorber thickness is reduced and finally vanishes when the absorber thickness is approximately 1μm. The investigations show that thickness reduction can be employed in order to suppress the roll-over phenomenon in CdTe solar cells. [Copyright &y& Elsevier]
Copyright of Thin Solid Films is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 65119710
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Back contact formation in thin cadmium telluride solar cells
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Hädrich%2C+M%2E%22">Hädrich, M.</searchLink><i> mathias.haedrich@uni-jena.de</i><br /><searchLink fieldCode="AR" term="%22Heisler%2C+C%2E%22">Heisler, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Reislöhner%2C+U%2E%22">Reislöhner, U.</searchLink><br /><searchLink fieldCode="AR" term="%22Kraft%2C+C%2E%22">Kraft, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Metzner%2C+H%2E%22">Metzner, H.</searchLink>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Thin+Solid+Films%22">Thin Solid Films</searchLink>. Aug2011, Vol. 519 Issue 21, p7156-7159. 4p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Thin+films%22">Thin films</searchLink><br /><searchLink fieldCode="DE" term="%22Tellurides%22">Tellurides</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+cells%22">Solar cells</searchLink><br /><searchLink fieldCode="DE" term="%22Schottky+barrier+diodes%22">Schottky barrier diodes</searchLink><br /><searchLink fieldCode="DE" term="%22Thickness+measurement%22">Thickness measurement</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+bands%22">Energy bands</searchLink><br /><searchLink fieldCode="DE" term="%22Simulation+methods+%26+models%22">Simulation methods & models</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+diagrams%22">Phase diagrams</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: We present a model describing the undesired roll-over which is a well-known phenomenon in the current–voltage characteristics of CdTe solar cells. Therein, the roll-over is ascribed to a Schottky barrier at the back contact which is effective as a reverse diode. The formation of this barrier is investigated depending on the CdTe absorber thickness as well as on the employed back contact metal. Computer simulations of the energy band diagram reveal that the back contact barrier can be reduced and even eliminated for sufficiently thin absorbers. The reason is the spatial overlap between the space-charge regions of the p–n heterojunction with the one of the back contact. This behaviour correlates with experimental current–voltage data of solar cells with a simple gold back contact. In the latter, the roll-over is considerable for absorbers with 3 to 5μm thickness, diminishes when the absorber thickness is reduced and finally vanishes when the absorber thickness is approximately 1μm. The investigations show that thickness reduction can be employed in order to suppress the roll-over phenomenon in CdTe solar cells. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Thin Solid Films is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=65119710
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.tsf.2010.12.144
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 4
        StartPage: 7156
    Subjects:
      – SubjectFull: Thin films
        Type: general
      – SubjectFull: Tellurides
        Type: general
      – SubjectFull: Solar cells
        Type: general
      – SubjectFull: Schottky barrier diodes
        Type: general
      – SubjectFull: Thickness measurement
        Type: general
      – SubjectFull: Energy bands
        Type: general
      – SubjectFull: Simulation methods & models
        Type: general
      – SubjectFull: Phase diagrams
        Type: general
    Titles:
      – TitleFull: Back contact formation in thin cadmium telluride solar cells
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Hädrich, M.
      – PersonEntity:
          Name:
            NameFull: Heisler, C.
      – PersonEntity:
          Name:
            NameFull: Reislöhner, U.
      – PersonEntity:
          Name:
            NameFull: Kraft, C.
      – PersonEntity:
          Name:
            NameFull: Metzner, H.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 31
              M: 08
              Text: Aug2011
              Type: published
              Y: 2011
          Identifiers:
            – Type: issn-print
              Value: 00406090
          Numbering:
            – Type: volume
              Value: 519
            – Type: issue
              Value: 21
          Titles:
            – TitleFull: Thin Solid Films
              Type: main
ResultId 1