Us researchers have discovered a new way to cheaply make solar cells that can replace conventional silicon crystals.The material, which turns sunlight into electricity more efficiently, is expected to be the manufacturing material for the next generation of solar cells.
Organic metal halogenated perovskite materials can be produced in large quantities and at low cost using a rolling process similar to newspaper printing, a team of researchers from Pennsylvania state university reported in the American journal chemistry.
The researchers used ultrafast infrared imaging to look at the structure and composition of the material and found it to be so flexible that it could hold the crystal structure even if the atoms vibrated on a large scale.When dealing with materials such as silicon, crystals need to be hardened to suppress atomic vibrations.
The study's author, John asbury, an associate professor of chemistry at Penn state university, said silicon solar cells are complex to make and difficult to meet mass demand, and researchers have been looking for new alternatives.The perovskite material of organic metal halide has good light absorption and can improve the efficiency of electric energy conversion.
Asbury also pointed out that at present, organic metal halogen-perovskite materials, which often contain lead and other toxic substances, are not able to replace silicon solar cells, but the scroll preparation method will lay a foundation for the development of the next generation of lead-free and more stable organic metal halogen perovskite materials.