Solar panels are a packaged, connected assembly of photovoltaic cells.
They are typically used in high reliability applications.
They too experience a significant reduction in output at elevated temperatures (>50deg C), although the effect is not as large as for polycrystalline panels.
Monocrystalline solar panels are one the most efficient commercially viable photovoltaic solar collectors.
Expensive to make.
More power per square foot.
Identifieable by its signature light or dark blue colour, but not uniformly so: some patches are lighter than others, and the corners of cells are usually missing as a result of the production process and the ph.ysical nature of monocrystalline silicon.
Efficiency up to 20%.
Polycrystalline (Multi Crystalline)
Panels made from polycrystalline cells are the most common and cheapest.
Output is significantly reduced in high temperatures.
12% to 12.5% efficiency.
Thin Film Amorphous
Their output does not decrease in elevated temperatures.
Their conversion efficiency of sunlight to electricity is about half that of polycrystalline or monocrystalline panels, so you will need a much larger surface area for the same power out.
Can be rolled up
Amorphous are shade tolerant.
Mono or Poly with bypass diodes handle partial shade better.