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Journal of Photonics for Energy • Open Access

Cu(In,Ga)Se2 thin-film solar cells based on a simple sputtered alloy precursor and a low-cost selenization step
Author(s): Veronika Haug; Ines Klugius; Theresa M. Friedlmeier; Aina Quintilla; Erik Ahlswede

Paper Abstract

High-efficiency thin-film solar cells based on Cu(In,Ga)Se2 are often formed by depositing precursor films and using a subsequent selenization step. We demonstrate a simple and cost-efficient approach simplifying both process steps by using a ternary Cu-In-Ga alloy target for sputter deposition of the precursor layer and by using a simple nonvacuum selenization reaction based on elemental selenium. In this contribution we examine in detail the characteristics of the precursor layers. The sputter growth is governed by a segregation of In-rich islands on top of a closed Cu-rich base. With optimized layers we could achieve conversion efficiencies well above 13% without the use of antireflective coating or metallic grids. The influence of the selenization duration on morphology and performance is discussed.

Paper Details

Date Published: 1 January 2011
PDF: 8 pages
J. Photon. Energy. 1(1) 018002 doi: 10.1117/1.3659500
Published in: Journal of Photonics for Energy Volume 1, Issue 1
Show Author Affiliations
Veronika Haug, Zentrum für Sonnenenergie- und Wasserstoff-Forschung (Germany)
Ines Klugius, Zentrum für Sonnenenergie- und Wasserstoff-Forschung (Germany)
Theresa M. Friedlmeier, Zentrum für Sonnenenergie- und Wasserstoff-Forschung (Germany)
Aina Quintilla, Zentrum für Sonnenenergie- und Wasserstoff-Forschung (Germany)
Erik Ahlswede, Zentrum für Sonnenenergie- und Wasserstoff-Forschung (Germany)


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