Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

P-N Junction Depth

  1. Apr 17, 2014 #1
    Hi,

    Could anyone explain how the affect that P-N junction depth has on the performance of a semiconductor device? Are there any devices which would benefit from having a much larger junction depth?
     
  2. jcsd
  3. Apr 20, 2014 #2
    For example, it affects the capacitance of the device, which can be important in high-frequency applications.

    Also, for x-ray detector photo diodes P-I-N diodes are used to increase the depth of the depletion layer in order to increase the active volume. Silicon is rather light and x-rays can penetrate quite deep through silicon. So most photons would simply pass through a thin, normal depletion layer without being absorbed, and thus without creating an electric signal in the detector.

    http://www.hamamatsu.com/eu/en/product/category/3100/4001/4103/S3204-08/index.html
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: P-N Junction Depth
  1. P-n junction (Replies: 5)

Loading...