Europe has planned to decrease fossil fuel consumption, greenhouse gas emission, and its dependence on foreign fossil fuel imports. Thus, it is developing renewable energy to attain sustainability and self-sufficiency in power generation while reducing environmental impact. The demand for solar energy in Europe is growing as capacity additions have continuously increased in the sector from 2002 to 2005. Solar energy demand depends on the cost of solar cells. Hence, techniques such as thin film technology for producing low cost solar cells need to be developed to keep the solar energy cost low. Europe is promoting the integration of solar energy systems in new constructions and renovated buildings to increase the consumption of solar power...