Which of these are the top 3 ways to make solar energy?

Photocatalyst Bi2wo is developing solar cell technology for large-scale commercial use in the form of photovoltaic cells.Bi2 will build its technology in partnership with Panasonic and Siemens, and it is targeting the commercialization of its technology for use in photoventure projects in the United States.The company's technology is expected to be commercialized in 2018, according to the company'...