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

Work function

  1. Apr 13, 2007 #1
    For metals, work function is defined as the energy gap from fermi level to the vacuum level and electrons can escape from material if they have a certain mount of kinetic energy that is larger than the work function. But, how can we define the work function for the semiconductor or it is totally wrong to use this term instead of using ionization potential to describe an electron escaping from semiconductor material to the vaccum?

    Like to hear something from your guys. :rolleyes:

  2. jcsd
  3. Apr 13, 2007 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor

    The "work function" for a semiconductor is defined as the band gap plus the energy from the bottom of the conduction band to the vacuum level, which is often called the electron affinity.

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Work function