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94 96 98 100 102 104 106 108 1100.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

No

rmali

ze

d (

A.

U.)

Binding Energy (E) (eV)

Deep

Middle

Surface

Flow 50 sccm

As-growth

500 1000 1500 2000 2500

Inte

nsity%(

U.A

.)

Wavenumber%(cm:1

)

%Annealing

%As:growth

Distance%5mm

Flow%50sccm

500 1000 1500 2000 2500

Inte

nsit

y%(

U.A

.)

Wavenumber%(cm:1

)

%Annealing

%As:growth

Distance%5mm

Flow %100sccm

500 1000 1500 2000 2500

Inte

nsity%(

U.A

.)

Wavenumber%(cm:1

)

%Annealing

%As:growth

Distance%5mm

Flow%150sccm

94 96 98 100 102 104 106 108 1100.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

Binding Energy (E) (eV)

Flow 50 sccm

AnnealingN

orm

ali

ze

d (

A.

U.)

Deep

Middle

Surface

94 96 98 100 102 104 106 108 1100.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

No

rma

lized

(A

. U

.)

Flow 100 sccm

As-growth Deep

Middle

Surface

Binding Energy (E) (eV)

94 96 98 100 102 104 106 108 110

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

N

orm

ali

zed

(A

. U

.)

Deep

Middle

Surface

Binding Energy (E) (eV)

Flow 100 sccm

Annealing

0 10 20 30 40

0

10

20

30

40

50

60

Flow 50 sccm

As-growth

Ato

mic

Perc

en

t (a

t. %

)

Etch Level

O1s

C1s Si2p

0 10 20 30 40

0

10

20

30

40

50

60

Ato

mic

Pe

rce

nt

(at.

%)

Flow 50 sccm

Annealing

Etch Level

O1s

C1s

Si2p

0 10 20 30 40

0

10

20

30

40

50

60

Etch Level

Ato

mic

Perc

en

t (a

t. %

)

Flow 100 sccm

As-growth

O1s C1s

Si2p

0 10 20 30 40

0

10

20

30

40

50

60

Etch Level

Ato

mic

Perc

en

t (a

t. %

)

Flow 100 sccm

Annealing

O1s

C1s

Si2p

600 650 700 750 800 850

0

20000

40000

60000

80000

100000

120000

140000

160000

180000

200000

Inte

nsit

y)(

u.a

.�

Wavelength)(nm�

)As=growth

)Annealing

Flow)of)50sccm

600 650 700 750 800 850

0

200000

400000

600000

Inte

nsit

y(�

a.u

.)

Wavelength(�nm)

(As<growth

(Annealing

Flow(of(100sccm

600 650 700 750 800 850

0

5000

10000

15000

20000

25000

30000In

ten

sity

(a.u

.�

Wavelength)(nm�

)As=growth

)Annealing

Flow)of)150sccm

200 300 400 500 600 700 800 900 10000

10

20

30

40

50

60

70

80

90

100

Tra

nsm

itta

nce

+(%

+T)

Wavelength+(nm)

+As?growth

+Annealing

Flow+of+50sccm

200 300 400 500 600 700 800 900 1000

0

10

20

30

40

50

60

70

80

90

100

Tra

nsm

itta

nce

+(%

+T)

Wavelength+(nm)

+As?growth

+AnnealingFlow+of+100sccm

200 300 400 500 600 700 800 900 1000

0

10

20

30

40

50

60

70

80

90

100

Tra

nsm

itta

nce

+(%

+T)

Wavelength+(nm)

+As?growth

+Annealing

Flow+of+150sccm

1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

(αh

v�̂

1/3

Energy)(eV�

)5mm8�72°C

Flow)of)100sccm

3.21eV