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is the w:conduction band, indicates the quasi-w:fermi energy levels, is the intrinsic Fermi level of the undoped semiconductor, and is the w:valence band. This band alignment is due to the biasing conditions that correspond with forward-active mode; forward bias on the emitter-base junction and reverse bias on the base-collector junction.
Band diagram for Schottky barrier at equilibrium Band diagram for semiconductor heterojunction at equilibrium. In solid-state physics of semiconductors, a band diagram is a diagram plotting various key electron energy levels (Fermi level and nearby energy band edges) as a function of some spatial dimension, which is often denoted x. [1]
Energy band diagram of a simple bipolar junction transistor under equilibrium showing electron energy versus position. The depletion regions of the emitter-base and base-collector junctions are marked. <math>E_c</math> is the conduction band
A schematic diagram of the Ebers-Moll models of a PNP BJT. The base, collector and emitter currents are I B, I C and I E, the common-base forward and reverse current gains are α F and α R, and the collector and emitter diode currents are I CD and I ED. Date: 4 August 2010, 05:26 (UTC) Source: Ebers-Moll_Model_PNP.PNG; Author
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The junction version known as the bipolar junction transistor (BJT), invented by Shockley in 1948, [12] was for three decades the device of choice in the design of discrete and integrated circuits. Nowadays, the use of the BJT has declined in favor of CMOS technology in the design of digital integrated circuits.
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The band diagram of an NPN BJT in equilibrium: Date: 20 February 2007: Source: Own drawing, done in Inkscape: Author: ... Bipolar junction transistor; Global file usage.