A recent study submitted to Acta Astronautica and currently available on the arXiv preprint server explores the potential for using aerographite solar sails for traveling to Mars and interstellar space, which could dramatically reduce both the time and fuel required for such missions.
More mass needs more energy to accelerate or decelerate. If you change the object’s mass without changing thrust (I guess sail size here), it will definitely take more time to get there.
Ah OK, so mass is important but surface isn’t, right?
In case of a solar sail however, surface is important.
That’s right!