At present, due to the greenhouse gas emission and its influences on global warming and degradation of ecosystems, the use of fossil fuels, according to its low cost for generating electricity, the amount of emissions are high which creates serious threats to the ecosystem and climate change. As a result, the international communities have proposed some solutions to reduce the rate of destruction of human ecosystem and reduce environmental pollution. In this regard, renewable energy sources such as solar power plants are proposed in the field of electrical power generation. Moreover, nowadays, it is used of variety of materials in manufacturing solar panels, some of which are hazardous to humans and the environment. In this paper, we study and compare the different generations and of solar cells in terms of the toxicity. Perovskite, which is a mineral led to a great hope for the optimal use of solar energy and its conversion into electricity.finally We will use harmless nano particles in peroveskite solar cells structure.