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

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


  1. External Quantum Efficiency René van Swaaij PVMD Delft University of Technology

  2. Learning objectives • External Quantum Efficiency (EQE)

  3. Learning objectives • External Quantum Efficiency (EQE) • Internal Quantum Efficiency (IQE)

  4. Learning objectives • External Quantum Efficiency (EQE) • Internal Quantum Efficiency (IQE) • Obtaining J SC from EQE

  5. Learning objectives • External Quantum Efficiency (EQE) • Internal Quantum Efficiency (IQE) • Obtaining J SC from EQE • Typical EQE measurement setup

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

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

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

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

  10. Definition External Quantum Efficiency: ratio of the collected electron-hole pairs to the number of incident photons _ _ _ ++ +

  11. EQE and IQE EQE

  12. EQE and IQE EQE Reflectivity

  13. EQE and IQE IQE EQE Reflectivity

  14. From EQE to Jsc

  15. From EQE to Jsc 0 1 2 3 4 5 6 φ(λ) [10 18 s -1 m -2 nm -1 ]

  16. From EQE to Jsc 6 5 φ(λ) [10 18 s -1 m -2 nm -1 ] 4 3 2 EQE (λ) · φ (λ) 1 0

  17. From EQE to Jsc 6 40 35 5 30 φ(λ) [10 18 s -1 m -2 nm -1 ] %&& [mA cm -2 ] 4 25 3 20 ) $ 15 J SC (∫ 2 10 EQE (λ) · φ (λ) 1 5 0 0

  18. From EQE to Jsc 6 40 35 5 30 φ(λ) [10 18 s -1 m -2 nm -1 ] %&& [mA cm -2 ] 4 25 3 20 ) $ 15 J SC (∫ 2 10 EQE (λ) · φ (λ) 1 5 0 0

  19. EQE testing setup Xenon lamp

  20. EQE testing setup Xenon lamp Chopper wheel

  21. EQE testing setup Xenon lamp Mono- chromator Chopper wheel

  22. EQE testing setup Solar cell Xenon lamp Mono- chromator Chopper wheel

  23. EQE testing setup Solar cell Xenon lamp Mono- chromator Lock-in Amplifier Chopper wheel

  24. EQE testing setup Solar cell Xenon lamp Mono- chromator Lock-in Amplifier Chopper wheel Computer

  25. EQE testing setup Reference diode Xenon lamp Mono- chromator Lock-in Amplifier Chopper wheel Computer

  26. EQE testing setup Reference diode Xenon lamp Mono- chromator Lock-in Amplifier Chopper wheel Computer

  27. Lock-in Amplifier Reference

  28. Lock-in Amplifier Reference Signal

  29. Lock-in Amplifier Reference Signal Lock-in

  30. Lock-in Amplifier Phase Sensitive Detection:

  31. Lock-in Amplifier Phase Sensitive Detection:

  32. Lock-in Amplifier Phase Sensitive Detection:

  33. Lock-in Amplifier Phase Sensitive Detection:

  34. Summary EQE is the ratio between the collected charge carriers per • second and the incident photons per second, per wavelength

  35. Summary EQE is the ratio between the collected charge carriers per • second and the incident photons per second, per wavelength J SC obtained by multiplying the EQE and light spectrum •

  36. Summary EQE is the ratio between the collected charge carriers per • second and the incident photons per second, per wavelength J SC obtained by multiplying the EQE and light spectrum • Lock-in amplifier to detect low amplitude signal from noise •

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