Well, that's neat.
But where is that really relevant? Typical albedo of anything around a solar panel seems to be like around .2, meaning that these cells which have 23% efficiency on the front, and ~21% on the back.
Solar Irradiance is usually less than 7kWh/m²day.
So this Panel could get around 1.6kWh/m²day on the front and 0.3kwH/m²day on the back.
Isn't cost way more relevant than getting a few more % efficiency?
As long as "we" (as in humanity) can't afford to put solar panels on the top of every/most surfaces that we build, it seems that driving down the cost is more paramount.
Luckily that is happening too though