Friday, 22 March 2019

diodes - Equivalent circuit for solar cell


I have a question regarding the equivalent circuit for a solar cell.
enter image description here



  • The circuit includes a diode to model the p-n junction of the cell. When some part of the photo-generated current flows through the diode, what physical situation does it imply? Does it mean that the photo-generated electron-hole pair at the junction, move according to the depletion field (hole towards p-type and electrons towards n-type) giving rise to the photo-current and some portion of this current flows as a diffusion current (holes towards n-type and vice versa), creating the diode current?


I just want qualitative arguments as an answer.




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