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The effect of diffusion doping with copper on the well-known photoluminescence of CdS in the visible and infrared is studied. It is concluded that the copper takes up an interstitial site closely associated with a cadmium vacancy. In this position it quenches the I1, I2, green edge, self-activated red, and 1.04 μm luminescence, but does not affect the 1.5 to 2.0 μm bands. A new band due to this copper appears at 700 nm, and these results confirm that the other features are related to cadmium vacancies.
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J. E. Ralph (1979) studied this question.
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