Well, it has come up again. Solar panel efficiency is claimed to have jumped a big step forward. I will simply give you the link to the article I read and prepare you with the following thought:

This particular statement in the article is very important; "The next step is to construct solar cells with quantum dots and study them. But one big problem still remains: "Hot" electrons also lose their energy in titanium dioxide. New solar cell designs will be needed to eliminate this loss, the researchers said."

Note the statement identifies the loss of all of the gained energy into the titanium dioxide.

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