Yes weeding out frauds in something like this is non-trivial. Like cytodyn you can’t know for sure until trials are run and certified that they aren’t blowing smoke. They don’t have a whole panel or even cell at those efficiencies yet but making steady progress with evidence of operation on sparse nanotubes. They are photoamperic not photovoltaic devices so not even characterized the same way as conventional solar cells. Part of their processes are run at Stanford labs.

But if you’re an EE prof yourself you can tell from the equipment, processes and in person discussions that they’re doing real science. Then it’s a very speculative bet on whether they can make it to the finish line of mass production at promised efficiencies