- #1
alphard
- 2
- 0
Hello everyone,
I have a quick question about the energy of the silicon. I know that, as a semiconductor, the silicon has an energy gap between the valence band and the conduction band. But according to this image , http://www.google.fr/imgres?imgurl=http%3A%2F%2Fwww.nano-ou.net%2FImages%2Fsilicon_split.png&imgrefurl=http%3A%2F%2Fwww.nano-ou.net%2FeduNanomaterials2.aspx&h=443&w=665&tbnid=lroOZttxuLz6EM%3A&zoom=1&docid=bVNjJ0Q6l2ncJM&ei=IW8MVYGONYPYOJ-ygeAO&tbm=isch&iact=rc&uact=3&dur=1859&page=1&start=0&ndsp=25&ved=0CCQQrQMwAQ , we see that when the interatomic distance between two atoms of silicon decreases, there is an interval where there is no more "forbidden energy gap" (where the two grey curves are connected). Does that mean that at this point, we have a conductor and not a semiconductor anymore ? I mean, by definition, a semiconductor has an energy gap, not as large as an insulator, but the gap exists. So, without any gap, it should by a conductor.
Thanks for your answers
I have a quick question about the energy of the silicon. I know that, as a semiconductor, the silicon has an energy gap between the valence band and the conduction band. But according to this image , http://www.google.fr/imgres?imgurl=http%3A%2F%2Fwww.nano-ou.net%2FImages%2Fsilicon_split.png&imgrefurl=http%3A%2F%2Fwww.nano-ou.net%2FeduNanomaterials2.aspx&h=443&w=665&tbnid=lroOZttxuLz6EM%3A&zoom=1&docid=bVNjJ0Q6l2ncJM&ei=IW8MVYGONYPYOJ-ygeAO&tbm=isch&iact=rc&uact=3&dur=1859&page=1&start=0&ndsp=25&ved=0CCQQrQMwAQ , we see that when the interatomic distance between two atoms of silicon decreases, there is an interval where there is no more "forbidden energy gap" (where the two grey curves are connected). Does that mean that at this point, we have a conductor and not a semiconductor anymore ? I mean, by definition, a semiconductor has an energy gap, not as large as an insulator, but the gap exists. So, without any gap, it should by a conductor.
Thanks for your answers