Junction formation by Zn(O,S) sputtering yields CIGSe-based cells with efficiencies exceeding 18

ABSTRACT In an effort to reduce the complexity and associated production costs of Cu(In,Ga)Se2 (CIGSe)‐based solar cells, the commonly used sputtered undoped ZnO layer has been modified to eliminate the requirement for a dedicated buffer layer. After replacing the ZnO target with a mixed ZnO/ZnS tar...

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Veröffentlicht in:Progress in photovoltaics 2014-02, Vol.22 (2), p.161-165
Hauptverfasser: Klenk, Reiner, Steigert, Alexander, Rissom, Thorsten, Greiner, Dieter, Kaufmann, Christian A., Unold, Thomas, Lux-Steiner, Martha Ch
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container_end_page 165
container_issue 2
container_start_page 161
container_title Progress in photovoltaics
container_volume 22
creator Klenk, Reiner
Steigert, Alexander
Rissom, Thorsten
Greiner, Dieter
Kaufmann, Christian A.
Unold, Thomas
Lux-Steiner, Martha Ch
description ABSTRACT In an effort to reduce the complexity and associated production costs of Cu(In,Ga)Se2 (CIGSe)‐based solar cells, the commonly used sputtered undoped ZnO layer has been modified to eliminate the requirement for a dedicated buffer layer. After replacing the ZnO target with a mixed ZnO/ZnS target, efficient solar cells could be prepared by sputtering directly onto the as‐grown CIGSe surface. This approach has now been tested with high‐quality lab‐scale glass/Mo/CIGSe substrates. An efficiency of 18.3% has been independently confirmed without any post‐deposition annealing or light soaking. Copyright © 2013 John Wiley & Sons, Ltd. A CIGSe/Zn(O,S)/ZnO:Al solar cell with a confirmed efficiency of 18.3% demonstrates the feasibility of junction formation by sputtering. This result was achieved without any surface treatments, annealing, or light soaking. This opens up a very attractive route to Cd‐free chalcopyrite‐based modules without a dedicated buffer layer.
doi_str_mv 10.1002/pip.2445
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source Wiley Online Library Journals Frontfile Complete
subjects Annealing
Applied sciences
buffer
Cu(In
Cu(In,Ga)Se2
Energy
Exact sciences and technology
Ga)Se2
hetero junction
Natural energy
Photovoltaic conversion
Solar cells. Photoelectrochemical cells
Solar energy
sputtering
thin film
Zn(O
Zn(O,S)
title Junction formation by Zn(O,S) sputtering yields CIGSe-based cells with efficiencies exceeding 18
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