Abstract
This report describes research for the period September 1988 to February 1990 directed at improving the performance of crystalline and polycrystalline silicon solar cells. Key results include the demonstration of 24.2% energy conversion efficiency for 4-cm{sup 2} crystalline cells fabricated using the development of the Passivated Emitter Cell processing sequence, the demonstration of energy conversion efficiency up to 22.4% for large-area, low-cost silicon concentrator cells fabricated using the laser grooved cell processing sequence, the demonstration of efficiencies up to 17.8% on 4-cm{sup 2} polycrystalline silicon substrates, and the demonstration of efficiencies of up to 16.7% on 10-cm{sup 2} polycrystalline substrates using a combined laser textured and grooved cell processing sequence. 32 refs., 17 figs., 20 tabs.
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