The thylakoid membranes were densely packed with structures called photosystems, which were filled with chlorophyll. Chlorophyll was a natural compound that absorbed photon energy, and there was a huge variety of them. Two types of chlorophylls, called Pd1 and Pd2, formed a dimer, which was called P680. The number referred to the wavelength of light it absorbed: six hundred eighty nanometers.0

A lot of chlorophylls have evolved to absorb different wavelengths of light in different plants and algae. Then, what kind of species was Palmaria romata, the algae Young-Joon brought?0

Romata had evolved quite ravenously to absorb even the faintest light that barely reached the depth of the ocean. Romata had a huge variety of chlorophylls, so it could absorb light like a sponge, covering a wide range of wavelengths, from two hundred to three thousand nanometers. It basically covered ninety-nine percent of the entire light energy spectrum.0

“Silicon solar cells could only absorb sunlight with wavelengths between three hundred to one thousand one hundred nanometers, which is mainly in the visible light region,” Young-Joon said. “Essentially, it only absorbs sixty percent of the entire solar energy and...0