Lecture 13: p-n Junctions

We talk more about holes today. They don't really exist, you know! But when only a few electrons are missing from the valence band, it's so much more convenient to describe only the missing states that the fictional particles we call "holes" are a very useful concept. We talk more about their mass, velocity, momentum, and other properties. Then we discuss the p-n junction, where a semiconductor surface is donor-doped on, say, the right, and acceptor-doped on, say, the left. We calculate the strength of the permanent electric field that happens at the interface. This permanent electric field produces a real live voltage in the material. Can you use it to run a light bulb? Due to technical difficulties this year, I post last year's lecture: Lecture Audio

You can listen to Lecture 13: p-n Junctions online on Radio and Podcast. Open the player on this page to stream the available audio.

Lecture 13: p-n Junctions is an episode from Solid State Physics by Prof. Carlson.

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This episode was published on Feb 28, 2006.

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