Solar power is an unlimited source of clean and renewable energy that can replace the climate-changing fossil fuels we use today. Currently, solar energy is used to a small extent but research and development of new solar energy materials is increasing rapidly. Common to many existing materials is that rare, expensive or toxic elements are used as important building blocks, which prevents large scale use of solar energy. The project is a new step towards the development of new solar energy materials based on the environmentally friendly, abundant and inexpensive raw material, iron.