What will happen to minor carrier density, total carrier density, and Efn if we add iron and boron? Adding iron atoms -> less excess carriers due to trapping. Adding boron -> increasing minor carriers. Adding boron-> decreasing Efn value. Addding boron-> will not affect total carrier density. adding iron impurities will generate more excess carriers. Adding boron will not affect Efn. Undoped silicon -> n.p=10^20; Adding Iron -> increasing Efn. Undoped ->

Delmar's Standard Textbook Of Electricity
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ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter1: Atomic Structure
Section: Chapter Questions
Problem 6RQ: How many valence electrons are generally contained in materials used for insulators?
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A piece of undoped silicon is exposed to a light source generating 10^12 excess carriers (cm^-3).
What will happen to minor carrier density, total carrier density, and Efn if we add iron and boron?
Adding iron atoms -> less excess carriers due to trapping. Adding boron -> increasing minor carriers.
Adding boron-> decreasing Efn value. Addding boron-> will not affect total carrier density.
Undoped -> adding iron impurities will generate more excess carriers. Adding boron will not affect Efn.
Undoped silicon -> n.p=10^20; Adding Iron -> increasing Efn.
Transcribed Image Text:A piece of undoped silicon is exposed to a light source generating 10^12 excess carriers (cm^-3). What will happen to minor carrier density, total carrier density, and Efn if we add iron and boron? Adding iron atoms -> less excess carriers due to trapping. Adding boron -> increasing minor carriers. Adding boron-> decreasing Efn value. Addding boron-> will not affect total carrier density. Undoped -> adding iron impurities will generate more excess carriers. Adding boron will not affect Efn. Undoped silicon -> n.p=10^20; Adding Iron -> increasing Efn.
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