Advantages and disadvantages of photodiode

There are some advantages of photodiode which are given below,

• The photodiode has better frequency response, linearity and spectral response than LDR.
• Photodiode is suitable in instrument that tests the laser pulse shape.
• It can operate at high frequencies in the order of 1 MHz.
• It can be used as variable resistance device.
• It is highly sensitive to the light.
• It has lower noise.
• Fastest photo detector.

There are some disadvantages of photodiode which are given below,

• It has rapid increase in dark current with temperature.
• It has small active area.
• There is necessity of amplification at low irradiances.
• It needs offset voltage.

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