Effect of temperature on voltage

[vw_g60t]

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

 

[Davide86]

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.

 

[m.s.j]

For a short discussion you can refer to Electrical Riddle No.26 from http://electrical-riddles.com

 

[Enthalpy]

Please refer to my contribution in another discussion. The knee voltage of the diode decreases with temperature.