New answers tagged photovoltaics
And a third way of looking at it: At higher temperatures more conduction band states are occupied. This will increase recombination / increase dark current.
I see you already have a answer at the device physics level, so here is the answer from the electronics point of view. The forward drop of a semiconductor junction (which is what a solar cell is) is inversely proportional to temperature. In fact, there have been integrated temperture sensors built on this principle. The current thru a solar cell is ...
From Sze (chapter 14 in the second edition): "As the temperature increases, the diffusion lengths in Si and GaAs will increase, because the diffusion constant stays the same or increases with temperature, and the minority lifetime increases with temperature. The increase in minority-carrier diffusion length causes an increase in J_L. However, Voc will ...
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