Organic-inorganic perovskite materials are key components of the new generation of solar cells. Understanding the properties of these materials is important for improving the lifetime and quality of solar cells. Led by Professor Yabing Qi, researchers from the Energy Materials and Surface Sciences (EMSS) Unit at the Okinawa Institute of Science and Technology Graduate University (OIST), in collaboration with Professor Youyong Li’s group from Soochow University (China) and Professor Nam-Gyu Park’s group from Sungkyunkwan University (Korea), recently reported in theJournal of the American Chemical Society the first atomic resolution study of organic-inorganic perovskite.
Perovskites are a class of materials with the general chemical formula ABX3. A and B are positive ions bound by negative X ions. Organic-inorganic perovskites used in solar cells are usually methylammonium lead halides (CH3NH3PbX3, where X is bromine, iodine or chlorine). The OIST scientists used a scanning tunneling microscope to create topographic images of the surface of a single crystal of methylammonium lead bromide (CH3NH3PbBr3).