This video seeks to explain the essential physics of a light emitting diode. A light emitting diode is a p-n junction in which an applied voltage creates a current flow that leads to electrons falling from the conduction band to the valance band, and in the process emitting light (photons). (Each electron that falls emits one photon.)
I think one can understand this physics without getting into the messy details of the "depletion region" at the interface of the p and n-type regions, or the difficult calculations that explain the unusual I-V characteristics of a pn junction. I am interested to get your feedback on how well this works. Do these explanations seem understandable, valid and interesting to you?
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