Photodiode
A photodiode is a semiconductor device that converts light into an electrical current. It operates in reverse bias and generates current when exposed to...
LED (Light Emitting Diode)
A Light Emitting Diode (LED) is a semiconductor device that emits light when current flows through it in the forward direction. Unlike ordinary diodes,...
Zener Diode
A Zener diode is a special type of diode designed to allow current to flow not only in the forward direction (like a normal...
Forward and Reverse Bias
Definition:
A PN junction diode works in two modes depending on how the external voltage is applied:
Forward Bias: Current flows easily.
Reverse Bias: Current is almost...
PN Junction Diode
Definition:
A PN junction diode is formed when a p-type semiconductor (rich in holes) is joined with an n-type semiconductor (rich in electrons). The junction...
Intrinsic & Extrinsic Semiconductors
Intrinsic Semiconductor
Definition:
An intrinsic semiconductor is a pure form of semiconductor material (like silicon or germanium) with no impurities. Its electrical conductivity comes only from...
Semiconductor
A semiconductor is a material that has electrical conductivity between that of a conductor and an insulator. It can conduct electricity under certain conditions,...
