This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Tipopn. Pt Bandas de Energia em semicondutores extrinsecos Jaciara Cssia de Carvalho Santos Jaciara Cssia de Carvalho Santos Semiconductor energy diagrams
Page 2023 Free-images.com. All images are Public Domain