Bandgap of semiconductors
<a href="//commons.wikimedia.org/wiki/User:%D0%94.%D0%98%D0%BB%D1%8C%D0%B8%D0%BD" title="User:Д.Ильин">Д.Ильин</a>: vectorization and Russian translation
<a href="//commons.wikimedia.org/wiki/File:BandDiagram-Semiconductors-E.PNG" title="File:BandDiagram-Semiconductors-E.PNG">File:BandDiagram-Semiconductors-E.PNG</a> by <a href="//commons.wikimedia.org/wiki/User:S-kei" title="User:S-kei">S-kei</a>