Fig. 3.28 Effects of a small
F ¼ 0–0.2 MPa on effective
polarization charge density.
(a) Homogeneous junction.
(b) Heterogeneous junction
Table 3.1 Concentrated effective polarization charge at the junction
Charge (C/m
2
)
P
À
P
+
σ
P
Load
F ¼ 0 MPa
Homogenous
À4.5638Â10
À6
À4.5638Â10
À6
0
Heterogeneous
À4.5638Â10
À6
À4.5638Â10
À6
0
Load
F ¼ 0.1 MPa
Homogeneous
À3.3952Â10
À6
À3.3952Â10
À6
0
Heterogeneous
À4.6562Â10
À6
À4.4714Â10
À6
À1.8475Â10
À7
Load
F ¼ 0.2 MPa
Homogeneous
À2.2267Â10
À7
À2.2267Â10
À7
0
Heterogeneous
À4.7485Â10
À6
À4.3790Â10
À6
À3.6951Â10
À7
3.14 Extension of a PN Junction
81