IBM’s new thin-film solar cell has broken a world record for having an efficiency of 9.6 percent.
The solar cell- made up of zinc, copper, tin and sulphur/selenium- has an efficiency rating that is 40 percent higher than older solar cells made up of the same materials. Thin film solar cells usually have a 9 to 11 percent efficiency rate, and usually come from very expensive elements like cadmium, gallium and indium.
Solar cells that do not have the expensive elements mentioned usually have an efficiency that doesn’t surpass 6.7 percent.
Other than being more efficient, the new IBM solar cell is also cheaper in terms of printing costs, slit casting, and dip and spray coating because it …