Why Don't Silicon Diodes Emit Light in LED Applications?

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SUMMARY

Silicon diodes do emit light, but their efficiency is significantly lower than that of gallium arsenide (GaAs), which is the preferred semiconductor for LED applications. The discussion highlights the challenges faced when using silicon diodes in astronomical cameras, where unintended light emission occurs during pixel clocking. This inefficiency is a critical factor in the selection of materials for LED technology.

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  • Understanding of semiconductor materials, specifically gallium arsenide (GaAs) and silicon.
  • Knowledge of LED technology and its applications.
  • Familiarity with the principles of light emission in diodes.
  • Basic concepts of astronomical imaging and camera technology.
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uzair_ha91
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Why don't silicon diodes emit light?
Attempt:
No idea. However, I do know that gallium arsenide is used as a semiconductor in LEDs.
 
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uzair_ha91 said:
Why don't silicon diodes emit light?.
They do - it's a big problem building astronomical cameras, every time you clock a pixel you get some light.

It's not very efficent though compared to GaAS
 

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