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Class notes UW EE280 (EE280)

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Class notes for UW EE280 (Helps me got 4.0!)

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  • September 20, 2024
  • 40
  • 2022/2023
  • Class notes
  • Arka majumdar
  • All classes
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CONSTANTS

h 6 626 × 1534 Js
= .




C =
3 × 108 uls

Me ≈ Mu =
9 .
1531 kg





1 36
× 15235 / K
{
= .




K
= 8 62× .
155 eU/ k X 300 = O
O
.
2586



lev = . 6 × 159 1 J 管 :
0 .
0259

q .
e = 1 6×
-
1019J

J
v =
f
kgmz/sz
=




ω= 2π
f

瓷 年
c =
f λ= 货 -
25
hC =
.78 9 0
×


pa
1




Ejuf ( Wave ) =




Eg =
hfo Ʃ KBT-

, BAND THEORY




rn
|
:free wat irafe
Conductance
Eondrction band Conduction ininmt
hntoe Noe " at T Ok





e in :


saund e [B
Valence band : e form i
o walent bond nisy brieiy nsrigig . nom . Baund
gap

Ualence 海 VB
Filled wle
band




Iutriusic Extriusic
CB
Doping N type p type
-
-




i
grormpl Vdonoz) groupl Acceptoz ) Douor leve e
β
# of e ( u ) extra e frorn
U =
P U >7 P 以 << P chonmor
# of holes (p )
hole froun acceptow

e crrzier bothn & p P Acceptor level 丘
Major u


Neutral charged UB 时






, BANID THEORY CONSTANTS





Fer mi
Emergy level Iutrinsic N P h 6 626 × 1534 Js
Type Type
_
-
= .




DAmvountofenergy that
add
to oa hew e to the CB C =
3 × 108 mls
EF
aysterm
Fermilevel EFi Me Mm = ≈ 9
. 1
× 1531 kg
2 ) 50 g% of possibilityofbeing EF

occupation by
e


VB 1 38
× 152351 K
{
=
am .




at that energy level K
= 8 62× 155 eU /
k
EF > EFi EF EFi
.

<


N =
ni Nd 3> Mi Na Mi

leV =
1 6
.
× 159 J

ErttgikTlmlEquaio
灯 ()
☆ Ex =
kTh 仁 vik

= m
川 : q ,
e = 1 6×
.
1019J

J =
kgmrlsi




otheruseful
Epn - EFi = kTlu
(]
tqus
KT / ( 器)
N
EFp -




EFi = -


m
.






, Notebook Paper to
Paperless


LECTURE 2
ELECTRONS & HOLES
COUALANT BOND


Form boudingbysharingvalance er




si Si

2 .
8 , 4 4 ,
8 ,
2




IONIC BOND

Form electrostatic force
by SEMICOND UCTORS


+
-




Conductions btwn metals & insuulontors
Na cr -



usually group 4dements
-



coupounolforunedfromcolume &U Elenlents


sillicon far
s by most
poyrular soun -
edemont
METALLE BOND mpound
CGalliumarsenide c ) used inhign speedopticalprsperties req
1

.




Form
by interactionbetween ion cores ethe
suroundng
free e ,




BAND GAP CENERGY BAND )

The gap pet ween Conductiou Baud & valeuce Band
Auti Form energy band
c




-




bondins

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