Looks like they use a form of the sputtering technique
http://www.scienceinafrica.co.za/2004/november/energy.htm
Which despite it's now lower cost is probably already obsolete, due to
this process:
http://www.nanosolar.com/index.html
Nanosolar already has $100 million in funding and plans for a plant
capable of producing 430 megawatts per year.
Robert Nelson wrote:
09/05/06 - Update on South African Photovoltaics
“In a scientific breakthrough that has stunned the world, a team of South
African scientists, led by Professor Vivian Alberts, has developed a
revolutionary new, highly efficient solar power technology�
The patent # (available in pdf from espacenet.com) is:
WO2005017979
