Light emitting diodes

Electronic materials, devices, and fabrication by Prof S. Parasuraman,Department of Metallurgy and Material Science,IIT Madras.For more details on NPTEL visit nptel.ac.in
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[@roshanisingh3951]

Amazing sir...

[@sree985]

Electrons and holes are recombining and releasing the light.After some time we loose all free electrons and holes ,then how they regenerate ?
Please tell me sir

[@avral4148]

Hi Prof S. Parasuraman, thanks for your nice lectures, I have a question about this part of lecture, if you look at the band bending between the n type and intrinsic materials 26:30, the band bends both in upward and downward directions between the n type and intrinsic region, could you tell why this happens?

[@batakpoot12]

Yep same confusion 😂