5.2 Modification of Band Alignment
109
metal
Si
metal
Si Si
Amorphous
and/or
nanocrystal Si
E VAC
E C
E V
E F
E F
E VAC
EA
φ A
SBH
change in only crystallinity does not
change band alignment
Amorphous
and/or
nanocrystal Si
E VAC
E C
E V
E F
E F
E VAC
EA
φ A
SBH
Fig. 5.15 Example of ineffective insertion of interlayer (see text for explanation)
Metal A
Metal B
Fig. 5.16 Schematic cross-sectional atomic illustrations of ideal interface with insertion layer (left),
atomic diffusion at the interface (middle), and interfacial reaction (right) (see text for explanation)