Mostly sand for the silicium. A little doping materials, phosphorous, arsenic. If you want to get fancy, cadmium, tellurium and selenium (but mostly that fad is over I think). Aluminium and copper for the frames and connectors, a bit of the usual plastics.

The big issue isn't resources, those are either present anyways or needed in very small quantities (dopants). The big problem is electricity for splitting up silicium oxide (sand) into usable silicium by electrolysis. You can do it in Germany, but then the power used will be mostly from lignite, so not very green most of the time.

Oh, and I forgot, glass for the cover. But again, mostly sand and heat.