ELCT363_Lecture10__EnergyBandII

ELCT363_Lecture10__EnergyBandII - Energy Band Structure...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
ELCT 363: Intro. to Microelectronics Lecture 10; Slide Mandal/Fall 2011 Energy Band Structure (summary) Semiconductors have “ allowed ” bands of energy levels. Only these energy levels or bands may be filled with electrons . The energy bands between these allowed bands are called “ forbidden ” bands; electron can not stay in these energy level. Valence band is the highest range of allowed energy band that is occupied by electrons at 0°K. Electrons in the valence band are bound to individual atoms. Conduction band is the range of energy band, that lies above the valence band. The electrons in the conduction band can move freely within the atomic lattice. Energy band gap is the energy difference between the top of the valence band (E v ) and the bottom of the conduction band (E c ). Conduction band E c E E g = E c -E v Valence band v Band Gap Energy 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Lecture 10; Slide Mandal/Fall 2011 Metals, Semiconductors, and Insulators Insulator Semiconductor Metal E g E g Motion of Electrons Conduction Electrons Available in Conduction Band At 0 K, semiconductors behave as insulators . (Electron distribution at T = 0 K)
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 9

ELCT363_Lecture10__EnergyBandII - Energy Band Structure...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online