Another example are these which I believe will be the way of the future.
Only problem is energy storage for use during darkness which is taken care of by using the dam and stored potential energy within the water contained in it.
http://www.gizmag.com/ibm-sunflower-hcpvt-pv-thermal-solar-concentrator/33989/
http://www.zurich.ibm.com/news/14/dsolar.html
http://www.zurich.ibm.com/st/energy/photovoltaic.html
https://scholar.google.com.au/schol...a=X&ei=6yP2VMDJHoSS8QXvjYHYDQ&ved=0CC4QgQMwAA