Growth and Characterization of All-inorganic Perovskite CsPbBr₃ Crystal by a Traveling Zone Melting Method

A self-designed traveling zone melting method was employed to fabricate perovskite CsPbBr 3 crystals, which is helpful for impurities removing and moisture excluding. A large-size CsPbBr 3 crystal with a dimension of 25 mm 60 mm is successfully obtained. The as-grown crystal shows orange color and displays an excellent transmittance of 78.6% in the range of 600 nm 2000 nm wavelength. It is revealed by DSC analysis that there is phase transition at 88.1 and 131.25, respectively. The band gap E g of the crystal is calculated to be 2.25 eV.