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

Aug 16, 2022 142 likes β€’717 views

Recombination Processes Radiative & Auger PVMD Ren van Swaaij Delft University of Technology Learning objectives Identify three recombination processes Learning objectives Identify three recombination processes

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PVMD

Delft University of Technology

Recombination Processes– Radiative & Auger

RenΓ© van Swaaij

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Learning objectives

  • Identify three recombination processes
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Learning objectives

  • Identify three recombination processes
  • Conceptualize underlying mechanisms
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Learning objectives

  • Identify three recombination processes
  • Conceptualize underlying mechanisms
  • Understand their recombination rates
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SLIDE 5

Recombination - definition

Recombination

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Recombination - definition

Recombination

annihilation of free charge carriers

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SLIDE 7

Three recombination processes

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Three recombination processes

Radiative

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SLIDE 9

Three recombination processes

Radiative Auger

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  • Three recombination processes

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Shockley- Read-Hall Radiative Auger

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SLIDE 11
  • Three recombination processes

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Shockley- Read-Hall Radiative Auger

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SLIDE 12

Radiative recombination

  • Energy emitted as photon

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Radiative recombination

  • Energy emitted as photon
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Radiative recombination

  • Energy emitted as photon
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Radiative recombination

  • Energy emitted as photon
  • Important for direct bandgap

materials

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Radiative recombination rate

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Radiative recombination rate

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Radiative recombination rate

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Radiative recombination rate

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Radiative recombination rate n-type under low-level injection:

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Radiative recombination rate n-type under low-level injection:

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Radiative recombination rate n-type under low-level injection:

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Radiative recombination rate n-type under low-level injection:

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Radiative recombination rate n-type under low-level injection:

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Radiative recombination rate n-type under low-level injection:

n-type

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Radiative recombination rate n-type under low-level injection:

n-type p-type

𝑆d = π›Ύπ‘ž0(π‘œ βˆ’ π‘œ0)

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SLIDE 27
  • Three recombination processes

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Shockley- Read-Hall Radiative Auger

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Auger Recombination Energy transferred to third particle

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Auger Recombination Energy transferred to third particle Third particle excited deeper into band

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Auger Recombination Energy transferred to third particle Third particle excited deeper into band Energy lost by thermalization

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Electron-Electron-Hole

Auger Recombination

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SLIDE 32

Auger Recombination

EEH

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SLIDE 33

Electron-Hole-Hole

Auger Recombination

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  • EEH
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SLIDE 34

EHH

Auger Recombination

EEH

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EEH and EHH recombination rate

EEH

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SLIDE 36

EEH and EHH recombination rate

EEH

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EEH and EHH recombination rate

EEH

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SLIDE 38

EEH and EHH recombination rate

EEH

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SLIDE 39

EEH and EHH recombination rate

EEH EHH

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EEH and EHH recombination rate

EEH EHH

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EEH and EHH recombination rate

EEH EHH

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EEH and EHH recombination rate

EEH EHH

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EEH and EHH recombination rate

EEH EHH Auger

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Auger recombination rate

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Auger recombination rate Strongly doped n-type Low-level injection

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Auger recombination rate Strongly doped n-type Low-level injection

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Auger recombination rate Strongly doped n-type Low-level injection

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Auger recombination rate Strongly doped n-type Low-level injection

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Auger recombination rate Strongly doped n-type Low-level injection

𝒐-type

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SLIDE 50

𝒒-type

Auger recombination rate Strongly doped n-type Low-level injection

𝒐-type

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SLIDE 51

𝒒-type

Auger recombination rate Strongly doped n-type Low-level injection

𝒐-type

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SLIDE 52

𝒒-type

Auger recombination rate Strongly doped n-type Low-level injection

𝒐-type

𝑆Aug β‰ˆ π·π‘žπ‘‚

𝐡 2π‘œ

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SLIDE 53

Overview

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SLIDE 54

Overview

Shockley- Read-Hall Radiative Auger

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SLIDE 55

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Overview

Shockley- Read-Hall Radiative Auger

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SLIDE 56

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Overview

Shockley- Read-Hall Radiative Auger

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SLIDE 57

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Overview

Shockley- Read-Hall Radiative Auger Next video