Abstract
This paper is a short status report on the continuing development of Cu 2—xTe-CdTe thin film solar cells for eventual aerospace application. The fabrication and operating characteristics are described, as well as on-earth maintenance, stability to thermal cycling, and resistance to radiation. Experiments with single crystal junctions are used to obtain a basic understanding of the Cu2—xTe-CdTe junctions, and to guide future thin film work. The most pressing current need is to determine how to extend cell life, particularly at elevated temperatures

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