The black solar cells absorb light far more effectively than any other solar cell model out there and hence they are bound to generate greater energy than any other ‘anti reflective coating’ available in the market today. ‘Reflectance’ is the measure of the amount of light a surface can reflect when compared to the total light falling (incident) on it. In case of the Black Solar Cell, it can pretty much absorb 99.7 percent of incident light and only reflects away 0.3 percent of it.
We still have not been given the exact efficiency figures of these new black solar cells, but it is pretty fair to assume that with the right technology and usage they will be a lot more efficient than traditional ones. What makes them especially significant is their ability to produce significantly higher energy on even cloudy days compared to the current solar cells since diffused light will not really set it back by that much. We will be waiting for some sort of commercial versions to roll out along with more details on their efficiency.