{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lecture6(3)

Lecture6(3) - EE 332 Semiconductor Materials and Devices...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
EE 332 Semiconductor Materials and Devices Lecture 6. Distribution Statistics and Carrier Concentrations 1. Thermal equilibrium 2. Fermi-Dirac statistics 3. Carrier Concentrations
Background image of page 1

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

View Full Document Right Arrow Icon
EE 332 Spring 2013 Review— Doping n-type p-type Electrons are majority carriers Holes are minority carriers Holes are majority carriers Electrons are minority carriers
Background image of page 2
EE 332 Spring 2013 Doping in Silicon n-type Donor ionization Energy Acceptor ionization Energy p-type
Background image of page 3

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

View Full Document Right Arrow Icon
EE 332 Spring 2013 Review—Symbols Symbols Definitions n concentration of electrons in conduction band p concentration of holes in valence band n 0 equilibrium concentration of electrons p 0 equilibrium concentration of holes n i intrinsic concentration of electrons N d (N a ) concentration of donor (acceptor) N d + (N a - ) concentration of ionized donor (acceptor) N c (N v ) Effective density of states at the edge of conduction band (valence band) Intrinsic material at equilibrium ( G 0 =R 0 ) n 0 =p 0 =n i n 0 p 0 =n i 2 n-type doped at equilibrium n 0 =N d p 0 =n i 2 / N d
Background image of page 4
EE 332 Spring 2013 Charge Carrier Concentration Example: If N d = 10 15 cm -3 , n 0 p 0 =n i 2 , n 0 = N d = 10 15 cm -3 n i = 10 10 cm -3 , p 0 = 10 5 cm -3 Conductivity of semiconductor σ = n 0 q μ n + p 0 q μ p How do we calculate electron or hole concentrations ( n, p ) ?
Background image of page 5

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

View Full Document Right Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 34

Lecture6(3) - EE 332 Semiconductor Materials and Devices...

This preview shows document pages 1 - 6. Sign up to view the full document.

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