Your Science Droids were lost on the crash. But you still may find them somewhere around.
If you find one, fix it with proper materials, and it will follow you to your base, and there will work producing science kits. Just build a Working Station and suply then with spare parts (or "food", as they call it), and they will work happily.
But if you dont give them what they need, they will take damages and may explode.