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This is lecture note for supporting the students that is related to the semiconductor device subject.
Typology: Lecture notes
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𝑬𝑭 không đổi ở trạng thái cân bằng
Vị trí của 𝑬𝒄 − 𝑬𝒗 xác định theo 𝑬𝑭
Vùng nghèo điện tích là vùng trong tiếp giáp pn mà 𝒏 ≈ 𝟎; 𝒑 ≈ 𝟎
εs ~ 12 𝜀 0
𝜌 𝐶/𝑐𝑚^3
s Ε ( x x A ) s Ε ( ) x A . x A.
2
2 s
d V d
dx dx
Ε
a (^) ( ) a ( (^) P )
s s
d qN qN x x x
Ε Ε
qNd
( ) d ( (^) N ) s
qN x x x
Ε
𝑉 = 0 𝑥 = 𝑥𝑃
𝑉 = 𝜙𝑏𝑖 𝑥 = 𝑥𝑁
2 ( ) ( ) 2
a P s
qN V x x x
2
2
( ) ( ) 2
( ) 2
d N s
d bi N s
qN V x D x x
qN x x
𝑥 = 0
𝑁+𝑃 𝑁𝑑 ≫ 𝑁𝑎
𝑃+𝑁 𝑁𝑎 ≫ 𝑁𝑑
a d
s bi P N dep q N N
x x W
x (^) p
a N p d
N x x N
qN
potentialbarrier qN
V Wdep s bi r s
2 ( | |) 2
N Nd Na lighter dopant density
1 1 1 1
dep
s dep
2
2 2 2 2
(^1) dep 2( (^) bi r )
dep s S
W (^) V
C A qN A
𝐶𝑑𝑒𝑝
1/
0
2 P (^ bi r ) s
qN V
(^)
Ε Ε
2
2
s crit VB (^) bi qN
Ε
𝑁 𝑉𝐵
𝐸𝐹𝑛 𝑥𝑃
Phía nào có nhiều hạt thiểu số hơn ???