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[ASK] where to find LED Components Material?

  1. Nov 8, 2011 #1
    Hello guys, nice to meet you all.
    It's kinda awkward since I'm new here and also just a freshmen in my university :)

    Anyway, I'm conducting a study about the LED components, whom I've already known it is consist of aluminium and Gallium Arsenide (GaAs) or Gallium Phosphide (GaP) or Gallium Arsenide Phosphide (GaAsP) or Indium Gallium Nitrogen (InGaN).

    What are the processes to create those compound (GaAs, GaP, GaAsP, InGaN)?

    And in this earth, where to find an abundant amount of those element (Ga, As, In, etc.) to create the compounds mentioned before?

    Thank you :)
     
  2. jcsd
  3. Nov 8, 2011 #2

    berkeman

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    Staff: Mentor

    Welcome to the PF.

    Since this is for schoolwork, you need to show us what you have found so far. What did you find by performing searches on those chemicals?

    Also, Chemical Supply companies will probably be one source of some of those chemicals -- did you try looking at some of their websites for information?
     
  4. Nov 18, 2011 #3
    Anyway, your question suddenly made up my mind to look up those things you said. And so far after you asked, I've found those data and it also makes the question I posed before answered. Thanks =)
     
  5. Nov 27, 2011 #4
    All the elements cites are by far abundant enough on Earth to make LEDs... And cheap enough as well.

    But the pure and perfect single-crystal needed for micro-electronics are not abundant at all! They are (very) difficult to produce, very few companies do it, and purposely for LEDs. Nothing for a kitchen experiment.

    The processes used? It may be a Bridgman refining, or a Czochralski - but under high pressure of the volatile element! Or from GaAs and InGaN you'll lose much As and N, ending with a horribly doped semiconductor. More difficult than with silicon.

    Could it be that wafers are delivered with an epitaxy already, to offer a layer that's clean and ordered enough?

    To the compounds you cite, more recent ones have been added to produce blue and ultraviolet light, which phosphors can convert to white.
     
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