PVMD Delft University of Technology Learning objectives External - - PowerPoint PPT Presentation

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PVMD Delft University of Technology Learning objectives External - - PowerPoint PPT Presentation

Jul 08, 2023 313 likes •676 views

External Quantum Efficiency Ren van Swaaij PVMD Delft University of Technology Learning objectives External Quantum Efficiency (EQE) Learning objectives External Quantum Efficiency (EQE) Internal Quantum Efficiency (IQE) Learning

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SLIDE 1

PVMD

Delft University of Technology

External Quantum Efficiency

René van Swaaij

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SLIDE 2

Learning objectives

  • External Quantum Efficiency (EQE)
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SLIDE 3

Learning objectives

  • External Quantum Efficiency (EQE)
  • Internal Quantum Efficiency (IQE)
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SLIDE 4

Learning objectives

  • External Quantum Efficiency (EQE)
  • Internal Quantum Efficiency (IQE)
  • Obtaining JSC from EQE
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SLIDE 5

Learning objectives

  • External Quantum Efficiency (EQE)
  • Internal Quantum Efficiency (IQE)
  • Obtaining JSC from EQE
  • Typical EQE measurement setup
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SLIDE 6

Definition

External Quantum Efficiency: ratio of the collected electron-hole pairs to the number of incident photons

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SLIDE 7

Definition

External Quantum Efficiency: ratio of the collected electron-hole pairs to the number of incident photons

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SLIDE 8

Definition

External Quantum Efficiency: ratio of the collected electron-hole pairs to the number of incident photons

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SLIDE 9

Definition

External Quantum Efficiency: ratio of the collected electron-hole pairs to the number of incident photons

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SLIDE 10

Definition

External Quantum Efficiency: ratio of the collected electron-hole pairs to the number of incident photons

+ ++

_ _ _

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SLIDE 11

EQE and IQE

EQE

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SLIDE 12

EQE and IQE

EQE Reflectivity

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SLIDE 13

EQE and IQE

EQE Reflectivity IQE

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SLIDE 14

From EQE to Jsc

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SLIDE 15

From EQE to Jsc

1 2 3 4 5 6

φ(λ) [1018 s-1 m-2 nm-1]

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SLIDE 16

From EQE to Jsc

1 2 3 4 5 6

φ(λ) [1018 s-1 m-2 nm-1]

EQE (λ) · φ (λ)

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SLIDE 17

From EQE to Jsc

1 2 3 4 5 6

φ(λ) [1018 s-1 m-2 nm-1]

5 10 15 20 25 30 35 40

JSC (∫

)

$ %&& [mA cm-2]

EQE (λ) · φ (λ)

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SLIDE 18

From EQE to Jsc

1 2 3 4 5 6

φ(λ) [1018 s-1 m-2 nm-1]

5 10 15 20 25 30 35 40

JSC (∫

)

$ %&& [mA cm-2]

EQE (λ) · φ (λ)

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SLIDE 19

EQE testing setup

Xenon lamp

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SLIDE 20

EQE testing setup

Xenon lamp Chopper wheel

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SLIDE 21

EQE testing setup

Chopper wheel Xenon lamp Mono- chromator

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SLIDE 22

EQE testing setup

Chopper wheel Xenon lamp Mono- chromator Solar cell

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SLIDE 23

EQE testing setup

Chopper wheel Xenon lamp Mono- chromator Solar cell Lock-in Amplifier

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SLIDE 24

EQE testing setup

Chopper wheel Xenon lamp Mono- chromator Solar cell Lock-in Amplifier Computer

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SLIDE 25

EQE testing setup

Chopper wheel Xenon lamp Mono- chromator Reference diode Lock-in Amplifier Computer

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SLIDE 26

EQE testing setup

Chopper wheel Xenon lamp Mono- chromator Lock-in Amplifier Computer Reference diode

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SLIDE 27

Lock-in Amplifier

Reference

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SLIDE 28

Lock-in Amplifier

Reference Signal

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SLIDE 29

Lock-in Amplifier

Reference Signal Lock-in

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SLIDE 30

Lock-in Amplifier

Phase Sensitive Detection:

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SLIDE 31

Lock-in Amplifier

Phase Sensitive Detection:

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SLIDE 32

Lock-in Amplifier

Phase Sensitive Detection:

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SLIDE 33

Lock-in Amplifier

Phase Sensitive Detection:

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SLIDE 34

Summary

  • EQE is the ratio between the collected charge carriers per

second and the incident photons per second, per wavelength

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SLIDE 35

Summary

  • EQE is the ratio between the collected charge carriers per

second and the incident photons per second, per wavelength

  • JSC obtained by multiplying the EQE and light spectrum
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SLIDE 36

Summary

  • EQE is the ratio between the collected charge carriers per

second and the incident photons per second, per wavelength

  • JSC obtained by multiplying the EQE and light spectrum
  • Lock-in amplifier to detect low amplitude signal from noise