Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 95, Issue 1, Pages 223-226Publisher
ELSEVIER
DOI: 10.1016/j.solmat.2010.03.033
Keywords
Cu(In,Ga)Se-2; Solar cell; Lift-off; Superstrate structure
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Cu(In,Ga)Se-2 (CIGS) solar cells with a superstrate structure were fabricated using a lift-off process. To widen the variety of substrate choices for CIGS solar cells, a lift-off process was developed without an intentional sacrificial layer between the CIGS and Mo back-contact layers. The CIGS solar cells fabricated on Mo/soda-lime glass (SLG) were transferred to an alternative SLG substrate. The conversion efficiency of the CIGS solar cells with the superstrate structure was 5.1%, which was almost half that of the CIGS solar cells with a substrate structure prior to the lift-off process. The low conversion efficiency was caused by the high series resistance and low shunt resistance, which would be due to the junction resistance between the CIGS/back contact and cracks introduced during the lift-off process, respectively. (C) 2010 Elsevier B.V. All rights reserved.
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