Oh, great point, eric.
The article you linked to says, “Solar radiation with wavelengths of 380 nm to 750 nm (violet to red) strike the material with enough energy to knock electrons from their weak bonds and create an electric current.”
Guide to LEP Flashlights says, “This Phosphor-Converted LED utilized the blue light to excite phosphor powder, resulting in combined yellow and blue wavelengths to produce a broad spectrum white light.”
If yellow is ~580 nm and blue ~450 nm, seems like those are in the range? (I’m not a physicist, so there may be lots of subtleties I’m missing!)