Yeah, the limit only applies to single junction solar panels which I believe most consumer level solar panels and solar farms are this type [something I heard d

Yeah, the limit only applies to single junction solar panels which I believe most consumer level solar panels and solar farms are this type [something I heard during graduate school, I have no source for this on top of my head]. I'm pretty sure the solar panel in the article is a single junction solar panel since they use PECVD (which is just CVD with a plasma generated above the wafer to improve uniformity) which allows them to get better results. Most double junctions require either MOCVD or even ALD but both technologies require longer fab time, have a higher reject rate, and the machines are almost 2X as expensive. Even then, the highest I've seen for solar panel efficiency product that you can purchase is around 32% and that is "state of the art" for today.