Fig. 7From: Effect of non-stoichiometry of initial reagents on morphological and structural properties of perovskites CH3NH3PbI3Raman spectra of the films formed of the solution of PbI2 and CH3NH3I compounds in DMF in the ratio (1:3) at temperatures of 100 (1), 150 (2), and 180 °C (3). All spectra were obtained with λexc = 532 nm at room temperatureBack to article page