Solution-based mist CVD technique for CH 3 NH 3 Pb(Br 1− x Cl x ) 3 inorganic–organic perovskites

We report the growth of inorganic–organic perovskites using a solution-based mist chemical vapor deposition (mist CVD) technique and the successful growth of the alloying CH 3 NH 3 Pb(Br 1− x Cl x ) 3 using mixture solutions of Br and Cl precursors. The formation mechanism of the inorganic–organic perovskite grown by the laminar flow-type mist CVD is suggested to be a vapor phase reaction, although solution precursors are used. The near-band-edge emissions from photoluminescence can be tuned from 500 to 550 nm by considering Br/Cl ratios in the solution without crystal phase segregation by incorporating Cl into crystalline CH 3 NH 3 PbBr 3 films.