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Improvements in CdTe module reliability and long-term degradation through advances in construction and device innovation

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By Imran Kahn, Integration Manager of Device Technology, First Solar; Lou Trippel, PV Module Product Line Director, First Solar; Nicholas Strevel, Technical Sales Manager, First Solar; Chad Kotarba, Engineer, First Solar

Recent advances in cadmium telluride (CdTe) research and development have improved the long-term power output degradation and extended reliability test performance of First Solar’s thin-film CdTe PV modules. This paper reviews the characterization results of the new First Solar cell structure with improved back-contact design that better manages the fundamental power-output degradation mechanism. First Solar's proprietary ‘Black’ series module construction significantly enhances the long-term durability and extended test performance of the modules. The accelerated lab-testing methods, field testing and associated analyses are discussed. These advances in the solar cell performance, coupled with upgraded module materials, further substantiate the long-term power-generating capability of First Solar's CdTe PV modules in harsh operating conditions.

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Photovoltaics International Archive
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