Abstract

Reactively sputtered ZnO from metal targets enjoys dual advantages of higher deposition rates and lower target costs than RF sputtering from ceramic targets. High deposition rate and conductive, aluminum-doped zinc oxide (ZnO:Al) thin-film materials have been fabricated by DC-powered reactive sputtering from a zinc-aluminum metal alloy target. Reliable process control of material properties is exercised by cathode voltage control. Data is presented on the process control and materials properties of the ZnO:Al thin films produced by DC reactive sputtering from metal targets. These materials were incorporated in copper indium diselenide (CIS) photovoltaic devices, and have resulted in AM1.5 efficiencies over 10%.

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