The world needs a new source of energy, an unspillable source.

What’s the most efficient way to make electricity from solar power on a large scale?

What’s the most efficient way to make electricity from solar power on a large scale? Is it using photovoltaic cells, or mirros and a turbine or what? I’d be interested in a web site that compares all the options by efficiency, cost, reliability in cloudy weather, and stuff like that.