Perovskites in the spotlight
Perovskites, materials with the crystal structure of calcium titanate, have only been intensely studied for solar cells since 2012. Tsutomu Miyasaka and his colleagues at Toin University of Yokohama were the first to use perovskites in a dye-sensitized solar cell (DSSC) configuration in 2009. Then in 2012, Nam-Gyu Park at Sungkyunkwan University in South Korea together with Michael GraÄtzel made 9.7% efficient cells with CH3NH3PbI3 nanocrystals and a solid hole-conductor based on spirobifluorine. In July 2013, GraÄtzel and colleagues reported 15% efficiency by using a two-step method to make more uniform, better-crystallized perovskite films. Scientists have also been experimenting with different materials to improve performance and appeal. In December 2013, Dianyi Liu and Timothy Kelly at the University of Saskatchewan in Canada made flexible, 10-plus percent efficient perovskite solar cells by replacing the titania with a much thinner zinc oxide layer that could be processed at room temperature.
Volume / Issue
Start / End Page
International Standard Serial Number (ISSN)
Digital Object Identifier (DOI)