Different between optical and electrical bandgap

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Wade Ellis

I found a few resources that you might find useful.

https://www.researchgate.net/post/What_is_the_basic_difference_between_optical_band_gap_and_electrical_band_gap

https://en.wikipedia.org/wiki/Band_gap#Optical_versus_electronic_bandgap

Hopefully these provide the insight you are looking for.

Ali Abdulkhaleq Alwahib

https://www.researchgate.net/post/What_is_the_basic_difference_between_optical_band_gap_and_electrical_band_gap/1

I don't know If ready this or not but I found it very useful

Sergey S. Kruk

Essentially, in both cases we consider a wavefunction in a periodic potential