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Do solar cells work with artificial light?

5/10/2018

2 Comments

 
Artificial light
​I explained in my previous post “Why the efficiency of the solar panel is limited?”. It is true that solar cell responds to certain wavelengths of light that is from red to the violet region (visible region) of the electromagnetic spectrum of the light. 
​
​The infra-red region does not have enough energy to pluck the electrons and send them to the higher energy levels.

​Whereas the ultra-violet region has extra energy than required by the electrons of the solar cell to start conducting, resulting in the heating of the solar cell which further reduces the efficiency of the cell.

Amount of light

​When it is dark, the solar cell stops conducting as there is no sunlight. As the amount of light increases gradually with the rise of the sun, the output of the solar cell also starts responding in the same manner.

​There comes a saturation point when the solar cell gives no additional current even after increasing the amount of the light. 

Electromagnetic spectrum

The electromagnetic spectrum is the band of energies including Gamma rays, X-rays, Ultra-violet, Visible rays, Infra-red, micro waves, and the radio waves.

​The solar cell produces electricity in the visible region of the spectrum and this region is also detectable by the human eye.

Artificial light

The solar panels work best with the sunlight that is why we see panels outside the houses, at the top of the roofs inclined at a certain angle with the sun rays. The solar cell also produces electricity with the artificial light like produced by the florescent lamp (CFL) and the incandescent bulb. Because the energy of these artificial sources of light falls under the visible spectrum as required by the solar cell to produce the current. But the amount of light produce by these artificial sources is very less, therefore we cannot run big solar panels under this light. Although we can power and run small devices like solar calculators, watches and mini toys like a small solar car. 

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2 Comments
Charu Singh
5/10/2018 02:17:12 pm

Nice article...
This means artificial light illuminates solar cells for smaller applications... But can't we use higher size CFL's for smaller size panels??

Reply
YASH KUMAR link
8/10/2018 10:36:55 am

Yes, we can use higher size artificial lights for powering panels but then the main purpose of using solar energy will not be served.
Thank for reading the post.

Reply



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