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Why do you use cadmium sulphate in light dependent resistors instead of silicon?

April 26, 2017Cadmium dependent light resistors Silicon Sulphate

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Why do you use cadmium sulphate in light dependent resistors instead of silicon?

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Cadmium sulphide (CdS) has been used since before bulk silicon was available. Besides Silicon is used as a semiconductor for making electronic transistors. Resistors have to be put on it. Cadmium Sulfide is cheap and works fine.