More and more research is focusing on ways to reduce reflection on the glass of solar panels. Reflection means the panels are not absorbing all of the light that hits them, and one of the most promising ways of reducing that reflection involves creating nano textured surfaces on the glass.
Researchers at Brookhaven National Laboratory are working on spiky cones as the best texture. As you can see from the photo, their process renders glass on the left almost completely reflectionless compared to the regular glass on the right.
Below see two other 7minutesolar articles on nanotexturing.