> What if it costs more electricity to produce this glass than it will ever produce in its entire lifespan? Fair question. This was precisely the problem with

> What if it costs more electricity to produce this glass than it will ever produce in its entire lifespan? Fair question. This was precisely the problem with early solar cells. I think one has to take a multi-decade view on some of these things. If the science tells us we can improve the technology within a reasonable time horizon and achieve positive ROI, then it makes sense. Otherwise it is a bad idea. Side note: We don't want UV light inside buildings. If this kind of glass makes economic sense and it can filter out UV light while producing some electricity, it is a win-win. I believe nearly all glass used in large buildings has UV cut coatings/treatment. If the cost is comparable this could be a viable substitute. The problem, of course, is that this might not be viable as a retrofit but rather something you would include in new designs (you need a new electrical design for the building in order to connect all glass to the grid).