[ASK] where to find LED Components Material?

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Discussion Overview

The discussion centers around the components of LEDs, specifically the materials used such as Gallium Arsenide (GaAs), Gallium Phosphide (GaP), Gallium Arsenide Phosphide (GaAsP), and Indium Gallium Nitrogen (InGaN). Participants explore the processes for creating these compounds and the availability of the necessary elements on Earth.

Discussion Character

  • Exploratory
  • Technical explanation
  • Homework-related

Main Points Raised

  • One participant inquires about the processes to create compounds like GaAs, GaP, GaAsP, and InGaN.
  • Another participant suggests that chemical supply companies might be a source for these chemicals and encourages the original poster to share their findings from research.
  • A later reply mentions that while the elements needed for LEDs are abundant and inexpensive, the pure single-crystal forms required for microelectronics are not easily produced and are difficult to obtain.
  • Participants discuss potential processes for producing these compounds, including Bridgman refining and Czochralski methods, noting the challenges associated with maintaining purity and quality.
  • There is mention of more recent compounds being developed for producing blue and ultraviolet light, which can be converted to white light using phosphors.

Areas of Agreement / Disagreement

Participants generally agree that the elements required for LED components are abundant, but there is no consensus on the ease of obtaining high-quality materials for microelectronics, with some highlighting the difficulties involved in production.

Contextual Notes

The discussion reflects a range of assumptions about the availability and production processes of LED materials, with some participants expressing uncertainty about the methods and challenges involved.

phost
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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 :)
 
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phost said:
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 :)

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?
 
berkeman said:
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?

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 =)
 
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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