NDLI: Towards the development of flexible CIGS solar cells on polymer films with efficiency exceeding 15%

Content Provider	IEEE Xplore Digital Library
Author	Bremaud, D. Rudmann, D. Bilger, G. Zogg, H. Tiwari, A.N.
Copyright Year	2005
Description	Author affiliation: Thin Film Phys. Group, Swiss Fed. Inst. of Technol., Zurich, Switzerland (Bremaud, D.; Rudmann, D.)
Abstract	Development of Cu(In,Ga)Se/sub 2/ (called CIGS) solar cells on polymers is challenging because of the thermo-physical properties of layers and substrates. CIGS layers of suitable structural and opto-electronic properties should be grown at low temperature (< 500/spl deg/C) as polyimides tend to degrade at higher deposition temperatures. Additionally, a method for controlled incorporation of an optimum amount of Na in CIGS is needed for high-efficiency cells since polyimides do not contain Na. Solar cells were developed on commercially available Upilex foils. CIGS layers were grown by evaporation of elemental Cu, In, Ga and Se at different substrate temperatures. Na from a NaF film was incorporated into CIGS layers with a post-deposition diffusion method that is suitable for in-line production of solar cells. Independent measurements have confirmed 14.1% efficiency under simulated AM1.5 standard test conditions. This is the highest efficiency reported to date for any kind of solar cell grown on polymer films. An average reflectance loss of about 13% was measured for these cells. Application of a commonly used anti-reflection coating would enable more than 15% efficiency flexible CIGS solar cells on polyimide foils.
Sponsorship	IEEE Electron Devices Soc. (USA)
Starting Page	223
Ending Page	226
File Size	871272
Page Count	4
File Format	PDF
ISBN	0780387074
ISSN	01608371
DOI	10.1109/PVSC.2005.1488109
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-01-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Photovoltaic cells Polymer films Temperature Polyimides Substrates Degradation Production Measurement standards Testing Reflectivity
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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