Question
Download Solution PDFWith reference to energy band diagram of the NPN BJT, there exist ________ space charge regions and maximum band bending at _________ junction.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFBipolar Junction Transistor
A bipolar junction transistor is a three-terminal current-controlled device. It is constructed with 3 doped semiconductor Regions i.e. Base, Collector and emitter separated by 2 p-n Junctions.
In an NPN BJT, there are two PN junctions:
- Emitter-Base Junction (forward-bias)
- Collector-Base Junction (reverse-bias)
In terms of band bending:
- Maximum band bending occurs at the collector-base junction because it is reverse-biased, which widens the depletion region and increases the electric field, causing a greater potential difference across it.
- The emitter-base junction is forward biased, which reduces band bending.
Last updated on Jun 16, 2025
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