(this molecule is green and is the equivalent of a solar panel)

i know this is a fairly simple question but i just want to make sure i have the right answer.

thanks in advance (:

For all the research done on plants and alternative energy sources you would think someone design a giant plant that would gather sun and turn it into energy the same way a plant does IE not using toxic substances like solar panels. Has there ever been such an effort…or do you have any ideas for one?