Solar cells from donuts and tea

It's been posted everywhere, and it doesn't acknowledge the source of the idea as far as I can tell, but here's a fantastic little video about making solar cells out of materials derived from powdered donuts and tea. He isolates titanium dioxide from the powder and sensitizes it with anthocyanins from a Tazo passion hibiscus tea. Here is a high school teacher doing the same project, with numerical data & extra science that you can't really fit in a video.

Still, I love these sort of suprising projects.