Download ppt - Northwestern University 04-20-04 Selected ZnO Properties - Molecular mass 81.389 - Specific gravity at room temp. 5.642 g/cm3 - Point group 6mm (Wurtzite)

Northwestern University 04-20-04

Selected ZnO Properties

- Point group 6mm (Wurtzite)- Lattice constants at room temp. a=3.250, c=5.205

- Melting point 2250 K

- a-axis direction 4.75

- c-axis direction 2.92

- Electron mass 0.28

- Hole mass 1.8- Bandgap energy at room temp. 3.37 eV- Exciton binding energy 60 meV

Resistivity depends on dopent. Direct bandgap

For intrinsic thin films=1500 cm perpendicular to substrate~109 cm parallel to substrate

-Specific gravity at room temp. 5.642 g/cm3

Single crystal=1-10 cm


ZnO structure





AlB2 ??




InAs

Crystal structure Zinc Blende

Energy Gap 0.354 eV

Intrinsic carrier concentration 1·1015 cm-3

Intrinsic resistivity 0.16 Ω·cm


InAs Nanowire


InAs1

2

3

4

5

6




