PIN photodiodes convert light to current – without a bias voltage having to be applied. Silicon is commonly used as an inexpensive detector material in the Vis range. For higher demands, InGaAs is used; it covers the widest spectral range from the Vis to the NIR. We offer silicon carbide as a “solar-blind” detector specifically for the UV range.
Modern InGaAs PIN photodiodes are panchromatic. The regular sensitivity range is 500 nm to 1700 nm; for extended InGaAs diodes, this range extends to 2600 nm.
Si PIN Photodiodes. Si photodiodes are reverse-biased PIN diodes. They detect light in a range from 250 nm to 1.1 µm. The incident radiation results in a measurable photocurrent.