pn -junctonJ under dark conditons No Bias Forward Bias Reverse Bias - - PowerPoint PPT Presentation

2.626/2.627 Lecture 5 (9/22/2011)

pn-junctonJ under dark conditons

No Bias Forward Bias Reverse Bias Model Circuit

N P

+ + +

• N

P N P

Band Diagram

E

e- difusion: e- drif:

x

p-type n-type

E

e- difusion: e- drif:

x

p-type n-type

E

e- difusion: e- drif:

x

p-type n-type

I-V Curve

I V I V I V

1

2.626/2.627 Lecture 6 (9/27/2011)

pn-junctonJ illuminated

No Bias Forward Bias Reverse Bias Model Circuit

N P

+ + +

• N

P N P

Band Diagram

E

e

• difusion:

e

• drif:
• ill. current:

x

p-type n-type

E

e

• difusion:

e

• drif:
• ill. current:

x

p-type n-type

E

e

• difusion:

e

• drif:
• ill. current:

x

p-type n-type

I-V Curve

I V I V I V

2

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2.627 Fundamentals of Photovoltaics

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