Solar Energy Help ASAP

posted by Anonymous

The current density of an ideal p-n junction under illumination can be described by:

J(V)=Jph−J0(eqVkT−1)
where Jph is the photo-current density, J0 the saturation-current density, q the elementary charge, V the voltage, k the Boltzmann's constant, and T the temperature.

A crystalline silicon solar cell generates a photo-current density of Jph=40mA/cm2 at T=300K. The saturation-current density is J0=1.95∗10−10mA/cm2.

Assuming that the solar cell behaves as an ideal p-n junction, calculate the open-circuit voltage Voc (in V).

  1. bobpursley

    If it is open circuit, then J(v)=0

    or
    Jph=Jo(e^(qV/T) )
    Take the ln of each side

    ln (Jph/Jo)=qV/T

    Voc=T/q *ln(Jph/Jo )

  2. Anon

    0.674 can someone help with the others quetion? Q4 5 6 7?

  3. Anonymous

    voc= kt/q * jph/jo + 1

  4. patel k k

    1402

  5. MANIRAGUHA Eric

    0.659 V

Respond to this Question

First Name

Your Answer

Similar Questions

  1. Physics

    Two infinitely long slits, S1 and S2, each of width d=0.1 cm are used to prepare a box-shaped electron beam with energy E=400 eV. At what distance x from the slit S2 will the thickness of this electron beam double due to Coulomb's …
  2. ET3034TUx Solar Energy

    The current density of an ideal p-n junction under illumination can be described by: J(V)=Jph−J0(eqVkT−1) where Jph is the photo-current density, J0 the saturation-current density, q the elementary charge, V the voltage, …
  3. Solar Energy Help ASAP

    John has used a solar simulator setup to measure the relation between the voltage and the current of a small photovoltaic cell (40 cm long and 40 cm wide). The measurement setup maintains the standard measurement conditions: the temperature …
  4. 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?
  5. Solar Energy Please Help

    Figure 1 shows a simplication of the AM1.5 solar spectrum at 1000W/m2. The spectrum is divided in three spectral ranges: A for 0nm<λ<620nm B for 620nm<λ<1240nm C for 1240nm<λ<1860nm The photon flux …
  6. TRIPLE JUNCTION SOLAR CELL - I

    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 …
  7. Solar

    Greeting All, please assist with the below. Thanks. The spectral power density of a solar simulator is given by: P(λ)=7.5∗1015λ−2.25∗109 [Wm^-2m^-1] for 300nm<λ<500nm P(λ)=2.25∗109−1.5∗1015λ …
  8. Solar Energy please help

    Solar simulators are used to study the performance of solar cells in the lab. In the figure below (left picture), the spectral power density of a solar simulator is shown with the blue line. The spectral power density of this solar …
  9. Homework Help: Solar Energy Please HelpASAP

    d) In the up-convertor 1, two photons are converted into one photon with 100% conversion efficiency. If all photons with energy above that of the band gap of a-SiC:H are absorbed in the a-SiC:H layer, in which spectral range can the …
  10. Physics

    The current density of an ideal p-n junction under illumination can be described by: J(V)=Jph−J0(e^qV/kT−1) where Jph is the photocurrent density, J0 the saturation current density, q the elementary charge, V the voltage, …

More Similar Questions