Relationship between light intensity and current

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SUMMARY

The discussion focuses on the relationship between light intensity and current generated in solar cells, specifically in the context of a solar cell characterization project. The user is attempting to correlate light intensity from a solar simulator with the electrical parameters of the solar cell, such as Isc (short-circuit current) and Voc (open-circuit voltage). Key concepts mentioned include Quantum Efficiency (EQE and IQE), which relate the number of photons incident on the solar cell to the current produced. The user suggests a formula to convert light intensity to the number of photons using the equation: number of photons/area = Intensity/(h * frequency).

PREREQUISITES
  • Understanding of solar cell parameters (Isc, Voc)
  • Knowledge of Quantum Efficiency (EQE and IQE)
  • Familiarity with light intensity measurement techniques
  • Basic physics of photons and their relationship to light intensity
NEXT STEPS
  • Research the calculation of Quantum Efficiency (EQE and IQE) in solar cells
  • Learn about light intensity measurement methods for solar simulators
  • Explore the relationship between light intensity and current in photovoltaic systems
  • Investigate the formula for converting light intensity to photon flux
USEFUL FOR

Researchers, engineers, and students involved in solar energy projects, particularly those focusing on solar cell performance and characterization.

hyderjoe
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I'm doing a solar cell characterization project. But due to some fault in my solar simulator(I'm getting different results from another set up), I'm now figuring a way to check the intensity of light shone by my simulator on cell. I'm trying to obtain it from the corrected data of my cell (Isc, Voc,... etc) Is there any formula that links light intensity and current generated? Thanks.
 
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I am not sure how much of help this is as I am not sure what exactly is being done. As far as I know, the Quantum efficiencies (EQE and IQE) give the ratio between the number of photons shining on the solar cell to the current generated. So if you can convert the intensity to number of photons (I think it is given as number of photons/area= Intensity/h*frequency), then you can link that to the current via these quantities.

You might check this file as well (again don't know how helpful it is)
http://www.icpress.co.uk/etextbook/p276/p276_chap1.pdf
 
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