Stanford creates flexible, high-efficiency peel-and-stick solar cells | ExtremeTech
That is the article. It doesn't say anything about the watts produced per square foot.
MPPT solar controllers (starting at under $100) do allow monocrystalline panels to work when partially shaded, giving you the best of both worlds (working in shade and having a high output).
I think it is a lot easier to mount a couple of rigid 20x18" 30w panels than a 10' long 60w flexible.