Polycrystalline Zn3P2/Indium-Tin Oxide Solar Cells

Abstract
Zinc phosphide (Zn3P2)/indium-tin oxide (ITO) heterojunction solar cells are fabricated by rf sputter depositing ITO on large grain polycrystalline Zn3P2 wafers. An AES analysis indicates that sputter etching of the Zn3P2 wafer surface before depositing ITO is of great importance in achieving a better performance as a solar cell. The passivation of Zn3P2 by reaction with atomic hydrogen is found to improve the cell performance significantly. Consequently, a power conversion efficiency of 2.1% (6 mm2 in active area) has been obtained without antireflection coating.

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