# UNO

Most popular questions and responses by UNO

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 simulator is given by:

1-Consider an organic solar cell consisting of a TiO2 semiconductor with an ionization energy 7.8eV and a polymer with an electron affinity 3.4eV. Which of the followning band diagrams corresponds to the organic solar cell. The band gap of TiO2 is 3.5eV.

3. ## 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 = 0.8 Wavelength= 850

Consider a PV module with the following parameters as measured at STC (Standard Testing Conditions): Voc = 55 V; Isc = 5 A; Impp = 4.7 A; Fill Factor = FF = 75% ; Efficiency = 19.75%. Suppose that under normal operation at STC conditions, the module is not

5. ## economics

Gasoline and beer are monopolistic competition. But why the prices of gasoline always changes while beer's price is constant?

1. ## The Giver

^-^

posted on May 5, 2016

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.

posted on December 2, 2013

posted on November 29, 2013

Thanks sat itÂ´s correct the first one

posted on November 29, 2013

Thanks Onix and sat

posted on November 29, 2013
6. ## Solar Energy

posted on November 24, 2013

Thanks Ken

posted on November 24, 2013

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

posted on November 23, 2013
9. ## Solar Energy

a:200 b:220 c:?? d:3 e:?? f:??

posted on November 22, 2013
10. ## Solar Energy Help ASAP

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 simulator is given by:

posted on November 22, 2013
11. ## Solar Energy

posted on November 22, 2013
12. ## Solar Energy

posted on November 22, 2013