spin steps(TiO2 on FTO already prepared):
-1:1 MAI:PbI2 in DMF dynamically added (while spinning at low, 500rpm speeds),
-then once it reached 6000rpms I shot 150uL of Chlorobenzene which pulled the DMF out and initiated the formation of perovskite (probably?).
The addition of the antisolvent chlorobenzene has to be practiced as its affected by when it is added, how fast it is added, how much is added and maybe the force at which is added. It is kind of an art is done by hand. If it was added by a robot then a proper procedure could be defined. A well performed antisolvent addition causes the perovskite to form a beautiful black mirror. Very satisfying!
Post time: Jun-13-2017