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

Nov 20, 2023 •142 likes •823 views

Generation/Recombination Current PVMD Ren van Swaaij Delft University of Technology Learning objectives Reverse bias: generation current Learning objectives Reverse bias: generation current Forward bias: recombination current

  1. Generation/Recombination Current PVMD René van Swaaij Delft University of Technology

  2. Learning objectives • Reverse bias: generation current

  3. Learning objectives • Reverse bias: generation current • Forward bias: recombination current

  4. Learning objectives • Reverse bias: generation current • Forward bias: recombination current • The ideality factor

  5. Space charge region under reverse bias p-type n-type E Cp E Fi E Fp E Cn E Vp E Fn E Vn

  6. Space charge region under reverse bias p-type n-type E Cp E Fi E Fp E Cn E Vp qV R E Fn E Vn

  7. Recombination in the space charge region

  8. Recombination in the space charge region

  9. Detailed balance 1. 2. 3. 4. - + + + - +

  10. Detailed balance 1. 2. 3. 4. - + + + - +

  11. Detailed balance 1. 2. 3. 4. - + + + - +

  12. Detailed balance 1. 2. 3. 4. - + + + - +

  13. Detailed balance 1. 2. 3. 4. - + + + - +

  14. Detailed balance 1. 2. 3. 4. - + + + - +

  15. Detailed balance 1. 2. 3. 4. - + + + - +

  16. Detailed balance 1. 2. 3. 4. - + + + - +

  17. Recombination in the space charge region

  18. Recombination in the space charge region

  19. Reverse bias: generation current

  20. Reverse bias: generation current Reverse bias:

  21. Reverse bias: generation current Reverse bias:

  22. Reverse bias: generation current Reverse bias:

  23. Reverse bias: generation current Reverse bias:

  24. Reverse bias: generation current Reverse bias:

  25. Reverse bias: generation current Reverse bias:

  26. Reverse bias: generation current Reverse bias:

  27. Space charge region under reverse bias p-type n-type E Cp - - E Fi - E Fp E Cn E Vp E Fn + + + E Vn

  28. Space charge region under reverse bias p-type n-type E-field E Cp - - E Fi - E Fp E Cn E Vp E Fn + + + E Vn

  29. Space charge region under reverse bias p-type n-type E-field E Cp - - E Fi - E Fp E Cn E Vp E Fn + + + E Vn

  30. Reverse bias: generation current

  31. Reverse bias: generation current

  32. Reverse bias: generation current

  33. Reverse bias: generation current

  34. Reverse bias: generation current

  35. Voltage dependence ln ( J ) ln ( J S ) V a

  36. Voltage dependence ln ( J ) ln ( J S ) V a

  37. Space charge region under forward bias p-type n-type E Cp E Cn E Fn E Fi E Fp E Vp E Vn

  38. Space charge region under forward bias p-type n-type E Cp E Cn E Fn E Fi qV a E Fp E Vp E Vn

  39. Space charge region under forward bias p-type n-type E Cp E Cn E Fn E Fi qV a E Fp E Vp E Vn

  40. Space charge region under forward bias p-type n-type E Cp E Cn E Fn E Fi qV a E Fp E Vp E Vn

  41. Space charge region under forward bias p-type n-type E Cp E Cn E Fn E Fi qV a E Fp E Vp E Vn

  42. Space charge region under forward bias p-type n-type E Cp E Cn E Fn E Fi qV a E Fp E Vp E Vn

  43. Recombination rate through the space charge region Relative recombination rate -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 Relative distance through space charge region

  44. Recombination rate through the space charge region Relative recombination rate Maximum recombination -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 Relative distance through space charge region

  45. Forward bias: recombination current

  46. Forward bias: recombination current

  47. Forward bias: recombination current

  48. Forward bias: recombination current

  49. Forward bias: recombination current

  50. Forward bias: recombination current

  51. Forward bias: recombination current

  52. Forward bias: recombination current

  53. Forward bias: recombination current

  54. Forward bias: recombination current

  55. Forward bias: recombination current

  56. Forward bias: recombination current

  57. Forward bias: recombination current

  58. Forward bias: recombination current

  59. Forward bias: recombination current

  60. Forward bias: recombination current

  61. Forward bias: recombination current

  62. Current in forward bias ln( J ) Recombination current, J rec (slope = ½) ln( J R 0 ) ln( J s )

  63. Current in forward bias Ideal diffusion current, J D (slope = 1) ln( J ) Recombination current, J rec (slope = ½) ln( J R 0 ) ln( J s )

  64. Current in forward bias Ideal diffusion current, J D (slope = 1) ln( J ) Total current Recombination current, J rec (slope = ½) ln( J R 0 ) ln( J s )

  65. Summary • Generation current:

  66. Summary • Generation current: • Recombination current:

  67. Summary • Generation current: • Recombination current: • The ideality factor:

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