It was almost impossible to make the blue LED [video]

Re:It was almost impossible to make the blue LED [video] by pfdietz on Friday February 09, 2024 @04:09PM (#39320592)

Also, I don't think the explanation for silicon was correct. As I understand it, the problem with Si is not that the bandgap is in the infrared, it's that it's an indirect bandgap semiconductor which suppresses emission of photons. Instead, the energy of recombination goes into heat.

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Re:It was almost impossible to make the blue LED [video] by ace2358 on Saturday February 10, 2024 @02:50PM (#39329583)

Thanks yes I think I remember my whole semiconductor education to be wishy washy (according to the lecturer) even at the undergrad level. Pretty complicated stuff and I think the ‘band gap’ model is a bit of a stretch of the quantum mechanics that is occurring.

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