Laser-induced local phase transformation of CIGSe for monolithic serial interconnection: Analysis of the material properties.

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Title: Laser-induced local phase transformation of CIGSe for monolithic serial interconnection: Analysis of the material properties.
Authors: Schultz, C.1 christof.schultz@htw-berlin.de, Schuele, M.1, Stelmaszczyk, K.1,2, Weizman, M.1, Gref, O.3, Friedrich, F.3, Wolf, C.2, Papathanasiou, N.2, Kaufmann, C.A.2, Rau, B.2, Schlatmann, R.1,2, Quaschning, V.1, Fink, F.1, Stegemann, B.1
Source: Solar Energy Materials & Solar Cells. Dec2016, Vol. 157, p636-643. 8p.
Subject Terms: Chalcopyrite, Electric conductivity, Laser pulses, Semiconductors, Thin films
Abstract: The change of electrical conductivity in chalcopyrite (i.e., Cu(In x , Ga 1−x )Se 2 or CIGSe) solar cells induced by nanosecond laser pulses is investigated as a function of the elemental composition and its spatial distribution. The underlying laser induced phase transformation process, which results in a decomposition of the CIGSe semiconductor and a modification of its elemental composition, is utilized to form the monolithic series interconnection between front and back contact in CIGSe based thin film solar cells. The results show a dependence of the composition of the CIGSe layer and the resulting series resistance on the applied laser fluence. Lower series resistance is primarily related to an enhanced fraction of copper, gallium and zinc in the laser transformed zone resulting from selective vaporization of absorber elements. For intermediate laser fluences (~0.36 J/cm 2 ) a patterning process is established that allows reliable and high-quality series interconnection. Both, lower and higher laser fluences result in high series resistances due to incomplete phase transformation or damages of the back contact, respectively. [ABSTRACT FROM AUTHOR]
Copyright of Solar Energy Materials & Solar Cells 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.)
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  Data: Laser-induced local phase transformation of CIGSe for monolithic serial interconnection: Analysis of the material properties.
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  Data: <searchLink fieldCode="AR" term="%22Schultz%2C+C%2E%22">Schultz, C.</searchLink><relatesTo>1</relatesTo><i> christof.schultz@htw-berlin.de</i><br /><searchLink fieldCode="AR" term="%22Schuele%2C+M%2E%22">Schuele, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Stelmaszczyk%2C+K%2E%22">Stelmaszczyk, K.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Weizman%2C+M%2E%22">Weizman, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Gref%2C+O%2E%22">Gref, O.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Friedrich%2C+F%2E%22">Friedrich, F.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Wolf%2C+C%2E%22">Wolf, C.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Papathanasiou%2C+N%2E%22">Papathanasiou, N.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Kaufmann%2C+C%2EA%2E%22">Kaufmann, C.A.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Rau%2C+B%2E%22">Rau, B.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Schlatmann%2C+R%2E%22">Schlatmann, R.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Quaschning%2C+V%2E%22">Quaschning, V.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Fink%2C+F%2E%22">Fink, F.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Stegemann%2C+B%2E%22">Stegemann, B.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Solar+Energy+Materials+%26+Solar+Cells%22">Solar Energy Materials & Solar Cells</searchLink>. Dec2016, Vol. 157, p636-643. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Chalcopyrite%22">Chalcopyrite</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+conductivity%22">Electric conductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Laser+pulses%22">Laser pulses</searchLink><br /><searchLink fieldCode="DE" term="%22Semiconductors%22">Semiconductors</searchLink><br /><searchLink fieldCode="DE" term="%22Thin+films%22">Thin films</searchLink>
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  Data: The change of electrical conductivity in chalcopyrite (i.e., Cu(In x , Ga 1−x )Se 2 or CIGSe) solar cells induced by nanosecond laser pulses is investigated as a function of the elemental composition and its spatial distribution. The underlying laser induced phase transformation process, which results in a decomposition of the CIGSe semiconductor and a modification of its elemental composition, is utilized to form the monolithic series interconnection between front and back contact in CIGSe based thin film solar cells. The results show a dependence of the composition of the CIGSe layer and the resulting series resistance on the applied laser fluence. Lower series resistance is primarily related to an enhanced fraction of copper, gallium and zinc in the laser transformed zone resulting from selective vaporization of absorber elements. For intermediate laser fluences (~0.36 J/cm 2 ) a patterning process is established that allows reliable and high-quality series interconnection. Both, lower and higher laser fluences result in high series resistances due to incomplete phase transformation or damages of the back contact, respectively. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Solar Energy Materials & Solar Cells 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.)
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        Value: 10.1016/j.solmat.2016.07.013
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 636
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      – SubjectFull: Chalcopyrite
        Type: general
      – SubjectFull: Electric conductivity
        Type: general
      – SubjectFull: Laser pulses
        Type: general
      – SubjectFull: Semiconductors
        Type: general
      – SubjectFull: Thin films
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      – TitleFull: Laser-induced local phase transformation of CIGSe for monolithic serial interconnection: Analysis of the material properties.
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              M: 12
              Text: Dec2016
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