Analysis on the third generation photovoltaics-multi-junction solar cell

Through recent decades, people have tried to find more environment friendly and efficient energy sources. Solar energy is one kind of these sources. This paper is a research paper which shows the development of third-generation photovoltaics multi-junction solar cell. It is based on analysis of several other published papers about multi-junction photovoltaics. And this paper talks about some background information about different generations of photovoltaic, shows basic principles behind multi-junction solar cell, and some today's applications of multi-junction solar cell. Through this paper, great efficiency and wide application of multi-junction solar cells are reflected. Thus, the great potential behind third generation photovoltaics can be shown.