Will we ever have solar panels that can be built sustainably? Will we ever have solar panels that can be assembled without a clean room?

Low Tech magazine posted a thing about Zinc/Antimony solar cells a few year ago, and I found that there were some schools working towards zinc cells more recently.

I've even seen some rumbling about nickel oxide cells, which look interesting.

If we could reasonably produce solar cells with materials and tools available to regular people or community workshops, makerspaces, etc it could legitimately change the world.