Relationship between wavelength and voltage?

[maiae]

Hi all,
I am in introductory physics and we are doing a self-designed lab. For my lab, I wanted to study the relationship between the wavelength of light and voltage. To do this, measured how much voltage drop there was in a single celled solar panel when I put colored filters over a light that I used to shine light on the solar cell. The relationship between wavelength and voltage as I have it plotted on a graph appears to be linear, but without knowing what the relationship is supposed to be, it's a little hard to determine. I think that this should have to do with the intensity of the light supplied to the system, but I can't think of a way that these would be related. Any help would be much appreciated.
Thanks!

 

[anorlunda]

Yes it does have to do with the intensity, but the properties of materials are not necessarily linear.

The voltage of a solar cell also depends on the current.

See this article for more detailed info.
https://en.wikipedia.org/wiki/Solar_cell