Gallium Arsenide

Views:
 
Category: Education
     
 

Presentation Description

Just a brief review on the Gallium Arsenide.

Comments

Presentation Transcript

SEMICONDUCTOR DEVICES : 

SEMICONDUCTOR DEVICES Physical Properties of Gallium Arsenide (GaAs)

Introduction to Gallium Arsenide: 

Introduction to Gallium Arsenide Gallium is a chemical element that has the symbol Ga and atomic number 31 Arsenic is a chemical element that has the symbol As and atomic number 33. Is a combination of chemicals Gallium which has the symbol Ga (atomic number 31) with chemical Arsenic that has the symbol As (atomic number 33).

Physical properties : 

Physical properties

Structure of GaAs: 

Structure of GaAs Crystal structure of GaAs similar to Zinc blende where cubic zinc structure in which the sulfide ions form a face-centered cubic array and the zinc ions fill one-half of the tetrahedral holes. Crystals of gallium arsenide are cubic in shape and dark grey in colour.

Physical Properties of GaAs: 

Physical Properties of GaAs

Ionization Energy: 

Ionization Energy Group II element can enter the lattice as substitutional impurities, replacing the group III element to become acceptor impurities. Group VI element can enter the lattice substitutionally, replace the group V element to become donor impurities. The ionization energy for the donors in GaAs are smaller than the ionization energy for the acceptor. This is because of the smaller effective mass of the electron compare to that of the hole.

Impurity Ionization Energy in GaAs: 

Impurity Ionization Energy in GaAs

Melting point of GaAs: 

Melting point of GaAs

Electrical Conductivity: 

Electrical Conductivity

Credits : 

Credits GROUP 4 HO JIA HUN 138255 TIOH PEE LING 138691 THAM TZI LEN 139239 CHAY KWOK MAN 138105 LEE SOON LI 130617 HAN SHIN YING 129980 AZILAH AMRAN 132333 IYLIA SYAZANA OTHMAN 131109 NOR SYAHIDA MOHIDIN 136679

authorStream Live Help