DARK CURRENT OF PHOTODIODE

Discussion in 'General Electronics Chat' started by TINTIN2015, Apr 6, 2015.

  1. TINTIN2015

    Thread Starter New Member

    Apr 6, 2015
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    Hello
    I am doing a project on photodiode. Please kindly inform that :
    How to measure dark current or leakage current of a photodiode?
     
  2. joeyd999

    AAC Fanatic!

    Jun 6, 2011
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    The same way you measure the "light" current, but with the lights turned off.
     
  3. TINTIN2015

    Thread Starter New Member

    Apr 6, 2015
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    I want to measure the 'dark current' in photoconductive mode. (With lights off) When applying reverse bias , a small reverse saturation current appears which can be easily measured. How to measure dark current(leakage current) from it?
     
  4. OBW0549

    Well-Known Member

    Mar 2, 2015
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    ScottWang likes this.
  5. joeyd999

    AAC Fanatic!

    Jun 6, 2011
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    There is no dark current in photoconductive mode. Where would the energy come from?

    Edit: ooops...got it backward...no dark current in photovoltaic mode.

    Again, the dark current (leakage current) is the remaining current after the lights are turned off. I don't know what else I can say!
     
  6. crutschow

    Expert

    Mar 14, 2008
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    The reverse saturation current, the leakage current, and the dark current are all the same for your purposes.
     
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