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“Thyl… what?”
Professor Kim Gwang-Myung frowned.
“Thylakoids,” Young-Joon replied.
“Thylakoids…”
“Plant leaves and algae have an organelle called the chloroplast. This organelle is green, which is why plant leaves and algae are green. There is a net of tiny pie-like internal structures inside the chloroplast, which are the thylakoids,” Young-Joon said. “The membranes of the thylakoids are actively engaged in taking sunlight and converting it into energy. Plants and algae have been evolving this for 2.4 billion years, and it’s an incredible level of efficiency.”
“... Haha.”
Kim Gwang-Myung scratched his head.
“Um, what should I say… Doctor Ryu, solar cells that mimic plant leaves are called biosolar cells. Not me, but many scientists have already tried that.”
“And they weren’t very successful?” Young-Joon asked.
“That’s right. I don’t know much about thylakoids and whatnot, but trying to obtain electrons from the chloroplast, which is a type of protein in a cell, and storing them… That’s very difficult. It was almost impossible to combine a solar cell made up of inorganic materials with chlorophyll, which is a complex mass of organic matter,” Kim Gwang-Myung...



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