Not enough CO2 content in the air to make these solar cells pay off. They will produce hydrogen gas too slowly and good luck gathering the hydrogen gas from an array of these newly invented solar cells.
What you have is a proof of concept and did the taxpayers get dinged for it?
YES!!!! TAXPAYERS GOT DINGED!!
“......was funded by the National Science Foundation and the U.S. Department of Energy. A provisional patent application has been filed.”