Charge carriers in semiconductors, Electrical Engineering

Charge Carriers in Semiconductors

  1. In a metal, the atoms are imbedded in a "sea" of free electrons, and these electrons can move as a group under the influence of an applied electric field.
  2. In semiconductors at 0 K, all states in the valence band are full, and all states in the conduction band are empty.
  3. At T > 0 K, electrons get thermally excited from the valence band to the conduction band, and contribute to the conduction process in the conduction band.
  4. The empty states left in the valence band can also contribute to current conduction.
  5. Also, introduction of impurities has an important effect on the availability of the charge carriers
  6. Considerable flexibility in controlling the electrical properties of semiconductors.
Posted Date: 1/11/2013 4:09:05 AM | Location : United States







Related Discussions:- Charge carriers in semiconductors, Assignment Help, Ask Question on Charge carriers in semiconductors, Get Answer, Expert's Help, Charge carriers in semiconductors Discussions

Write discussion on Charge carriers in semiconductors
Your posts are moderated
Related Questions

Explain the purpose of the I/O instructions IN and OUT. The IN instruction is used to move data from an I/O port into the accumulator. The OUT instruction is used to move d

3) A sine wave oscillator, in effect, converts

Q. What are the uses of MOSFET? The most common use of MOSFET transistors today is the CMOS (complementary metallic oxide semiconductor) integrated circuit which is the basis f

what is a transformer?

Q. Multi-link connection in a network of register? For a multi-link connection in a network of register- controlled exchanges, a register in originating exchange receives addre

Next, let us consider the case of a balanced delta-connected load with impedance of 5 45° supplied by a three-phase, three-wire 100-V system, as shown in Figure (a). We shall dete


The power transferred across the air gap of a two pole inductionmotor is 24 kW. If the electromag netic power developed is 22 kW, find the slip. Calculate the output torque if the

The armature of a d.c. machine has a resistance of 0.3 and is connected to a 200V supply. Calculate the e.m.f. generated when it is running (a) as a generator giving 80A (b) as a