ecuaciones Flashcards

1
Q

niveles de energ[ia

A

En=n^2 E= (ħ^2 n^2 pi^2)/(2m a^2)

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2
Q

fuerza

A

F = -q E

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3
Q

densidad de portadores en funci[on de T

A

ni^2 = BT^3 exp(-EG/kT)

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4
Q

densidad de estados cuánticos por unidad de volumen del cristal

A

g(E) = 4pi (2m*n/h^2) ^1.5 E^1/2

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5
Q

densidad de estados en conducción

A

gc(E) = 4pi (2m*n/h^2) ^1.5 (E-Ec)^1/2

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6
Q

densidad de estados en valencia

A

gv(E) = 4pi (2m*p/h^2) ^1.5 (Ev-E)^1/2

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7
Q

probabilidad de que un estado este ocupado por electrones

A

Ff(E) = 1
—————————–
1+exp((E-Efi)/kT)

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8
Q

probabilidad de que un estado no este ocupado por electrones

A

1
1- Ff(E) = 1- —————————–
1+exp((E-Efi)/kT)

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9
Q

cual es la ley que se utiliza para probabilidades de particulas indistinguibles

A

fermi dirac

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10
Q

concentracion total de e por unidad de volumen en conducciòn

A

n0= 2 (2pim*nTq)^3/2 (-Ec-Efi/kT)
————————- e
h^3

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11
Q

concentracion total de huecos por unidad de volumen en conducciòn

A

p0= 2 (2pim*nTq)^3/2 (-Efi-Ev/kT)
————————- e
h^3

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12
Q

energia de fermi intrínseca

A

3/4 KT ln(mp/mn) + EG/2

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13
Q

cambio de temp n0

A

Nc (Tf/T0)^1.5 (-Ec-Efi/kTf)
e

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14
Q

ni^2

A

p0*n0= NcNv -EG/kT
e

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15
Q

tipo n

A

no>p0

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16
Q

tipo n n0

A

Nc ( -Ec-Efe/kT)
e

17
Q

tipo p p0

A

Nv ( -Efe-Ev/kT)
e

18
Q

Semiconductor tipo n fórmula 2

A

Efe-Efi =kTln(no/ni)

19
Q

Semiconductor tipo o fórmula 2

A

Efi-Efe=ktln(p0/ni)