Physics · Class 12 · Chapter 14
Semiconductor Electronics: Materials, Devices and Simple Circuits
12 lessons104 min5 simulations10 practice questions
Why does silicon sit between copper and glass in how well it conducts, and how can a few impurity atoms per million change that a thousandfold? This chapter explains conduction with energy bands, builds n-type and p-type material by doping, joins them into a p-n junction, and follows the junction diode from its one-way V-I curve to the rectifier and capacitor filter inside every mains power supply.
Also called: semiconductors · p-n junction diode · logic gates · rectifiers
Lessons
12 lessons · 104 min
01From valves to semiconductorsNCERT §14.16 min02Classifying solids by conductivityNCERT §14.26 min03Energy bandsNCERT §14.27 min04Intrinsic semiconductorsNCERT §14.37 min05n-type and p-type semiconductorsNCERT §14.47 min06Carrier concentration and band levelsNCERT §14.411 min1 sim07Formation of a p-n junctionNCERT §14.5.110 min1 sim08Diode under forward and reverse biasNCERT §14.610 min1 sim09Diode V-I characteristicsNCERT §14.6.210 min1 sim10Half-wave and full-wave rectifiersNCERT §14.710 min1 sim11Filtering with a capacitorNCERT §14.76 min12Chapter reviewMust-know facts, traps and formulas14 min
Simulations
5 in this chapter
Doping: electrons and holesIn: Carrier concentration and band levelsHow the depletion layer formsIn: Formation of a p-n junctionp-n junction under biasIn: Diode under forward and reverse biasA one-way valve for currentIn: Diode V-I characteristicsFrom ac to steady dcIn: Half-wave and full-wave rectifiers