Description:
Shown is the relative electric field density in a 400 nm perovskite layer incorporated in a thin-film solar cell (not shown) for incoming light of various wavelengths. The hills and valleys are due to the wave character of light and the subsequent interference effects upon (back-) reflection in such a thin-film device.
This graph and data were contributed by Tom van der Pol, Eindhoven University of Technologyy.