The epitaxy is the hard part of an LED — and the good news is you can buy it. A commercial InGaN epiwafer already contains the quantum wells; everything after that is contacts and geometry. This guide covers the simplest process that gets you from a piece of epiwafer to visible electroluminescence.
What an LED epiwafer actually is
[YOUR TEXT — layer stack (sapphire / n-GaN / MQW / p-GaN), where to source pieces, what to look for.]
The minimal device
[YOUR TEXT — the hackiest working LED: contact schemes, reaching the n-layer, why current spreading in p-GaN is the enemy.]
Contacts
[YOUR TEXT — p-contact and n-contact metals, what works without annealing, what improves with it.]
Probing and first light
[YOUR TEXT — test setup, compliance settings, what the I-V should look like, what a bad one tells you.]
Where to go from here
[YOUR TEXT — mesas, isolation, packaging (see the packaging guide), brightness.]