Solar Energy Please Help

The figure below presents the EQE of a triple junction solar cell with junctions A, B and C under short circuited (V = 0 V) condition.

a) What is the bandgap (in eV) of the absorber layer of the junction A?

b) What is the bandgap (in eV) of the absorber layer of the junction B?

c) What is the bandgap (in eV) of the absorber layer of the junction C?

d) Which of the following statements is TRUE?

1)Junction C acts as the top cell, Junction B as the middle cell, and Junction A as the bottom cell.

2)Junction B acts as the top cell, Junction C as the middle cell, and Junction A as the bottom cell.

3)Junction A acts as the top cell, Junction B as the middle cell, and Junction C as the bottom cell.

Each junction is illuminated under standard test conditions. Given the photon fluxes below, calculate the short-circuit current density (in mA/cm2) of each (separate) junction (A, B and C):

ϕ=9.3∗1020m−2s−1 for 300nm<λ<650nm

ϕ=8.4∗1020m−2s−1 for 650nm<λ<850nm

ϕ=1.4∗1021m−2s−1 for 850nm<λ<1250nm

e) Jsc of Junction A:

f) Jsc of Junction B:

g) Jsc of Junction C:

h) The Voc of each junction in V can be roughly estimated by the equation

Voc=Egap(J)2q=Egap(eV)2
where q is the elementary charge, Egap(J) is the bandgap energy expressed in Joules, and Egap(eV) is the bandgap energy expressed in eV. Assume a fill factor of FF=0.75. What is then the efficiency (in %) of the triple junction solar cell?

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  1. d) Junction A acts as the top cell, Junction B as the middle cell, and Junction C as the bottom cell.

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    posted by I.G.
  2. Can you also give out the rest of the answers?? thanks

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  3. Someone has the others results please???

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    posted by Jesus
  4. Hey guys i exchange the answers of this question with the assignment 5...
    just let me know

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    posted by Jesus
  5. hi

    anyone have the answers to this Q

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    posted by jen
  6. Add the missing figures please

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    posted by Ken
  7. a 1447
    b.45
    c.25

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  8. None is true answer sorry

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  9. This is the link to the image

    postimg org/image/fsra4o0h1/

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  10. Please help...

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  11. PLEASE HELP

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    posted by UNO
  12. The figure below presents the EQE of a triple junction solar cell with junctions A, B and C under short circuited (V = 0 V) condition.
    EQE table is:

    A: EQE = 0.7 wavelength= 300 to 650 nm
    B: EQE = 0.9 Wavelength= 650 to 850 nm
    C: EQE = 0.8 Wavelength= 850 to 1250 nm

    a) What is the bandgap (in eV) of the absorber layer of the junction A?

    b) What is the bandgap (in eV) of the absorber layer of the junction B?


    c) What is the bandgap (in eV) of the absorber layer of the junction C?

    d) Which of the following statements is TRUE?

    Junction C acts as the top cell, Junction B as the middle cell, and Junction A as the bottom cell.
    Junction B acts as the top cell, Junction C as the middle cell, and Junction A as the bottom cell.
    Junction A acts as the top cell, Junction B as the middle cell, and Junction C as the bottom cell

    TRIPLE JUNCTION SOLAR CELL - III
    Each junction is illuminated under standard test conditions. Given the photon fluxes below, calculate the short-circuit current density (in mA/cm2) of each (separate) junction (A, B and C):

    ϕ=9.3∗1020m−2s−1 for 300nm<λ<650nm

    ϕ=8.4∗1020m−2s−1 for 650nm<λ<850nm

    ϕ=1.4∗1021m−2s−1 for 850nm<λ<1250nm

    e) Jsc of Junction A:


    f) Jsc of Junction B:


    g) Jsc of Junction C:

    TRIPLE JUNCTION SOLAR CELL - IV
    h) The Voc of each junction in V can be roughly estimated by the equation

    Voc=Egap(J)2q=Egap(eV)2
    where q is the elementary charge, Egap(J) is the bandgap energy expressed in Joules, and Egap(eV) is the bandgap energy expressed in eV. Assume a fill factor of FF=0.75. What is then the efficiency (in %) of the triple junction solar cell?

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    posted by UNO
  13. bandgaps:
    a) 1.9
    b) 1.46
    c) 0.992

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    posted by foxman
  14. @foxman thinks

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    posted by Anon
  15. plz answer
    e,f,g,h parts

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  16. Please answer e,f,g,h

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    posted by UNO
  17. e) 10.4302
    f) 12.1125
    g) 17.9444

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    posted by Kobur
  18. H. 17.022

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  19. d) Which of the following statements is TRUE?

    1-Junction C acts as the top cell,
    2-Junction B as the middle cell, and
    3-Junction A as the bottom cell.
    Junction B acts as the top cell, Junction C as the middle cell, and Junction A as the bottom cell. Junction A acts as the top cell, Junction B as the middle cell, and Junction C as the bottom cell.
    Please help

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    posted by UNO
  20. d) Junction A top
    Junction B middle
    Junction C bottom

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    posted by Dino

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