Which of the following is not used in solar cells?

Solar cells generally require semi-conductors for their construction. Silicon and Germanium are semi-conductors and Gallium when mixed with other impurities can act as semi-conductor but Platinum is not a semiconductor and can not be used as semi-conductor and more over platinum is very expensive to get.

Is platinum used in making solar cell?

Platinum is a key material in dye-sensitized solar cells, where it is used to make counter electrodes. … Dye-sensitized solar cells are thin, flexible, easy to make and very good at turning sunshine into electricity. However, a key ingredient is one of the most expensive metals on the planet: platinum.

What wavelength do solar cells absorb?

Solar radiation with wavelengths of 380 nm to 750 nm (violet to red) strike the material with enough energy to knock electrons from their weak bonds and create an electric current. The unused wavelengths (ultraviolet & infrared) do not have enough energy to dislodge the electrons and are absorbed as heat.

Is germanium used in solar cells?

Germanium serves as the bottom layer of the most efficient existing type of solar cell, but is used primarily on NASA, military and commercial satellites because of the high expense – raw germanium costs about $680 per pound. … Germanium is a semiconductor at the bottom of “multijunction” solar cells.

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What is the difference between photodiode and solar cell?

Major difference between photodiode and solar cell:

Size (solar cell are larger and larger than photodiodes) Load capacity (solar cell load capacity is greater than photodiodes) … Application (photodiodes are used as sensors, solar cells are used as transducers that convert light into electricity)

Can gold be used in solar panels?

Gold Solar Cells

It is possible to construct solar panels out of less common materials. … The layers trap the light, and the gold films work as mirrors, trapping more light than a silicon solar cell would. This allows the nanoparticles to absorb 11 times more sunlight than in a typical cell.

Is platinum used in renewable energy?

Platinum can be used in fuel cells for electric vehicles, as well as to produce green hydrogen. Hydrogen has been proposed as an alternative fuel source for decades, but its high cost, among other things, has prohibited it from taking off,” according to CNBC.

What wavelength of light is best for solar cells?

Minimum and Maximum Wavelengths

The wavelengths of visible light occur between 400 and 700 nm, so the bandwidth wavelength for silicon solar cells is in the very near infrared range. Any radiation with a longer wavelength, such as microwaves and radio waves, lacks the energy to produce electricity from a solar cell.

What is the frequency of solar energy?

The three main U.S. grids run on a frequency of 60 cycles per second (60 hertz), and European grids on 50 Hz.

What are the 2 main disadvantages of solar energy?

Disadvantages of Solar Energy

  • Cost. The initial cost of purchasing a solar system is fairly high. …
  • Weather-Dependent. Although solar energy can still be collected during cloudy and rainy days, the efficiency of the solar system drops. …
  • Solar Energy Storage Is Expensive. …
  • Uses a Lot of Space. …
  • Associated with Pollution.
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