Two-inch-sized perovskite crystals, CH₃NH₃PbX₃ (X=I, Br, Cl), with high crystalline quality are prepared by a solution-grown strategy. The availability of large perovskite crystals is expected to transform its broad applications in photovoltaics, optoelectronics, lasers, photodetectors, LEDs, etc., just as crystalline silicon has done in revolutionizing the modern electronics and photovoltaic industries.

http://onlinelibrary.wiley.com/doi/10.1002/adma.201502597/epdf