Hello,
I have been trying to obtain mixed perovskite film based on FA, MA, PbI2, PbBr2. I prepared solutions in DMF and DMSO (4:1). But, after annealing, grayness color was observed on the film. Actually, I have tried different conditions such as different glove box, spin speed, antisolvent, antisolvent dropping time and amount. Also, I used new solvents.
What should I do in order to obtain good morphology mixed perovskite film? Please help me.
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