Energy band diagram, Electrical Engineering

Energy Band Diagram

Energy band diagram in qualitative form is sketched by following the following process:

1. The semiconductor device is supposed to be made by bringing together the several distinct semiconductor layers, metals or insulators of that it is composed. The starting point is hence the energy band diagram of all the constituent layers.

2. The  band  diagram  of  the  composite  device  is  sketched  by using  the  fact  that after equilibrium, the Fermi energy is similar everywhere in the system. The equalization of the Fermi energy is accompanied along with transfer of electrons from regions of higher Fermi energy to area of lower Fermi energy and viceversa for holes.

3. The redistribution of charges effects in electric field and creation of potential barriers in the system. These influences however are confined only close to the interface among the layers. The regions that are far from the interface remain as they were before the equilibrium.

Posted Date: 1/11/2013 2:37:55 AM | Location : United States







Related Discussions:- Energy band diagram, Assignment Help, Ask Question on Energy band diagram, Get Answer, Expert's Help, Energy band diagram Discussions

Write discussion on Energy band diagram
Your posts are moderated
Related Questions
Switching Characteristics Switching  characteristics  of BJT  are shown  in figure. Due  to the presence of internal  capacitances BJT  cannot be  turned  instantly. Initially

Explain protected mode interrupt. In this mode, interrupts have exactly similar assignments as in real mode, but the interrupt vector table is not same. In place of interrupt

Q. Show Advantage of digital control system over analog system? Sampled data and digital control offer several advantages over analog systems: • More compact and lightweight

Adaptors : When you plug two or more appliances into a plug that makes it possible to use more than one piece of electrical equipment from a single socket. The total current drawn


Q. Digital watches display time by turning on a certain combination of the seven-segment display device. (a) Show a typical seven-segment display. (b) Develop a truth table f

Q. What is Message Demodulation? The major advantage of the conventional (standard) DSB AMsignal transmission is the ease with which the signal can be demodulated. Themessage s

Q. ADMM (digital multi meter) reads true rms values of current. If the peak value of each of the following periodic current waves is 5 A, find the meter reading for: (a) a sine wav

Q. What do you mean by addressing and numbering? Numbering and Addressing: In data and telephone networks, end equipment are more often single units than multiple devices uni

You have been hired by Serge Brink and Larry Park to assist them in the evaluation of a recently issued term sheet from Global VC Partners. The new venture is an Internet startu