PVMD Ren van Swaaij Delft University of Technology Learning - - PowerPoint PPT Presentation

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PVMD Ren van Swaaij Delft University of Technology Learning - - PowerPoint PPT Presentation

Oct 28, 2022 15 likes •345 views

Recombination parameter J 0 PVMD Ren van Swaaij Delft University of Technology Learning objectives How is V oc related to saturation current density, J 0 , and minority carrier lifetime? Relation between J 0 and recombination

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SLIDE 1

PVMD

Delft University of Technology

Recombination parameter J0

René van Swaaij

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SLIDE 2

Learning objectives

  • How is Voc related to saturation current density, J0,

and minority carrier lifetime?

  • Relation between J0 and recombination
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SLIDE 3

Recombination and Voc

EFn

Fn

EFp

Fp

eV eVoc

  • c
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SLIDE 4

Recombination and Voc

EFn

Fn

EFp

Fp

eV eVoc

  • c
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SLIDE 5

Recombination and Voc

EFn

Fn

EFp

Fp

eV eVoc

  • c

For:

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SLIDE 6

Recombination and Voc

EFn

Fn

EFp

Fp

eV eVoc

  • c

For:

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SLIDE 7

Recombination and Voc

EFn

Fn

EFp

Fp

eV eVoc

  • c

For:

slide-8
SLIDE 8

Recombination and Voc

EFn

Fn

EFp

Fp

eV eVoc

  • c

For:

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SLIDE 9

Recombination and Voc

EFn

Fn

EFp

Fp

eV eVoc

  • c
slide-10
SLIDE 10

Recombination and Voc

EFn

Fn

EFp

Fp

eV eVoc

  • c
slide-11
SLIDE 11

Recombination and Voc

EFn

Fn

EFp

Fp

eV eVoc

  • c
slide-12
SLIDE 12

Recombination and Voc

EFn

Fn

EFp

Fp

eV eVoc

  • c
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SLIDE 13

Recombination and Voc

EFn

Fn

EFp

Fp

eV eVoc

  • c

Voc depends on recombination rate

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SLIDE 14
  • Three recombination processes

+

Shockley- Read-Hall Radiative Auger

  • +

+

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SLIDE 15

conduction band valence band EC EV x x = = 0, , surface tr trap states

Surface recombination

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SLIDE 16

Total recombination rate p-type

W

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SLIDE 17

Total recombination rate p-type

W

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SLIDE 18

Total recombination rate p-type

W

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SLIDE 19

Generation and recombination in thermal equilibrium

  • Thermal generation equals thermal

recombination

  • +
  • +
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SLIDE 20

Generation and recombination in thermal equilibrium

  • Thermal generation equals thermal

recombination for any mechanism

  • +
  • +
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SLIDE 21

Recombination rates in thermal equilibrium SRH Radiative Auger Surface

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SLIDE 22

Recombination rates in thermal equilibrium SRH Radiative Auger Surface

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SLIDE 23

Recombination parameter J0 SRH Radiative Auger Surface

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SLIDE 24

Recombination parameter J0 SRH Radiative Auger Surface

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SLIDE 25

Recombination parameter J0 SRH Radiative Auger Surface

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SLIDE 26

Recombination parameter J0 SRH Radiative Auger Surface

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SLIDE 27

Application J0 in analysis

Ag Ag Al

p++ p++

p-type sc Si n+ SiNx c-Si (200 – 300 μm)

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SLIDE 28

Application J0 in analysis

Ag Ag Al

p++ p++

p-type sc Si n+ SiNx c-Si (200 – 300 μm)

J0,d

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SLIDE 29

Application J0 in analysis

Ag Ag Al

p++ p++

p-type sc Si n+ SiNx c-Si (200 – 300 μm)

J0,d J0,Auger J0,SR

SRH

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SLIDE 30

Application J0 in analysis

Ag Ag Al

p++ p++

p-type sc Si n+ SiNx c-Si (200 – 300 μm)

J0,d J0,Auger J0,s,fron

  • nt

J0,SR

SRH

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SLIDE 31

Summary

  • Voc is related to saturation current density J0
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SLIDE 32

Summary

  • Voc is related to saturation current density J0
  • Voc is related to lifetime  recombination

processes

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SLIDE 33

Summary

  • Voc is related to saturation current density J0
  • Voc is related to lifetime  recombination

processes

  • Recombination processes can be expressed in J0