selenium rectifier

selenium rectifier

A type of rectifier using a cadmium and selenium junction to control the flow of electrons. When a layer of selenium is deposited on an aluminum base, and a cadmium alloy plate is pressed against the selenium, a barrier is formed between the selenium and the cadmium. Electrons can easily pass through this barrier from the cadmium, through the selenium to the aluminum, but they cannot pass through the barrier in the opposite direction.

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