Two new treatments for silicon wafers improve solar-cell conversion efficiency by precipitating electrically-active chromium impurities. One method is simple heat treatment. Other involves laser-induced damage followed by similar heat treatment. Chromium is one impurity of concern in metallurgical-grade silicon for solar cells. In new treatment, chromium active centers are made electrically inactive by precipitating chromium from solid solution, enabling use of lower grade, lower cost silicon in cell manufacture.


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    Title :

    Precipitating Chromium Impurities in Silicon Wafers


    Contributors:

    Published in:

    Publication date :

    1982-12-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




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