Effect of temperature on voltage

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SUMMARY

The voltage of silicon solar cells decreases with increasing temperature due to the rise in electrons' kinetic energy, which leads to more frequent scattering events between electrons and the lattice. This increased scattering reduces the current, consequently lowering the open circuit voltage. The phenomenon is also observed in diode knee voltage, which similarly decreases with temperature. For further insights, refer to Electrical Riddle No.26 at http://electrical-riddles.com.

PREREQUISITES
  • Understanding of semiconductor physics
  • Familiarity with silicon solar cell technology
  • Knowledge of voltage-current relationships in diodes
  • Basic principles of thermal effects on electronic components
NEXT STEPS
  • Research the impact of temperature on silicon solar cell efficiency
  • Study the relationship between kinetic energy and electron mobility in semiconductors
  • Explore the concept of diode knee voltage and its temperature dependence
  • Investigate thermal management techniques for solar panels
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Electrical engineers, solar energy researchers, and anyone involved in the design and optimization of silicon-based photovoltaic systems.

vw_g60t
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Hi,

I know that voltage decreases with temperature but why?

I am looking into silicon solar cells but cannot find any sources which explain why open circuit voltage decreases with rise in temperature.

can some explain please!

thanks
 
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vw_g60t said:
Hi,

I know that voltage decreases with temperature but why?

I am looking into silicon solar cells but cannot find any sources which explain why open circuit voltage decreases with rise in temperature.

can some explain please!

thanks

I cannot give you a rigorous explanation, but I think (but I'm not totally sure) that the increase of temperature causes the increase of the electrons' kinetic energy. That's why the scattering events between electrons and the lattice occur more frequently: this fact decrease the current, and so the voltage.
 
Please refer to my contribution in another discussion. The knee voltage of the diode decreases with temperature.
 

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