Triple-Junction Amorphous Silicon Alloy PV Manufacturing Plant of 5 MW Annual Capacity

    Research output: Contribution to conferencePaper


    A spectral-splitting, triple-junction a-Si alloy solar cell processor has been designed, built and optimized. A roll-to-roll process has been used to deposit two layers of back reflector, a triple-cell structure with nine layers of a-Si and a-SiGe alloys and a single layer of antireflection coating consecutively on a half-a-mile roll of stainless steel. The coated web is next slabbed andprocessed to make a variety of products. The design of the machine and processes used incorporate several key features developed for improving cell efficiency. In order to reduce manufacturing cost, higher deposition rates and thinner cells than are used in R&D have been used. The back reflector also consists of Al/ZnO rather than Ag/ZnO. Large-scale production has begun, and products are beingshipped for a wide range of applications.
    Original languageAmerican English
    Number of pages4
    StatePublished - 1997
    EventTwenty Sixth IEEE Photovoltaic Specialists Conference - Anaheim, California
    Duration: 29 Sep 19973 Oct 1997


    ConferenceTwenty Sixth IEEE Photovoltaic Specialists Conference
    CityAnaheim, California

    Bibliographical note

    Work performed by United Solar Systems Corp, Troy, Michigan and Energy Conversion Devices, Inc., Troy, Michigan

    NREL Publication Number

    • NREL/CP-520-24984


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