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Only metals undergo photoelectric effect?

  1. Jun 13, 2012 #1
    Only metals undergo photoelectric effect???
     
  2. jcsd
  3. Jun 13, 2012 #2
    No. Most metals, especially the alkali metals, emit electrons from visible light. Non-metals emit electrons from higher energy photons, in the upper range of ultraviolet.
     
  4. Jun 13, 2012 #3
    Also, you might want to ask yourself, what makes the metals more 'metallic' than other elements? Compare those characteristics to non-metals, and you'll understand why the photoelectric effect can occur in non-metals at higher photon energies.

    answer:
    Metals give up their electrons more easily: smaller band gap. Non-metals like to hold on to them: larger band gap.
     
  5. Jun 14, 2012 #4
    I didn't get your point... Actually, I didn't get clarity...
     
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