I am trying to make a film of CH3NH3PbI3/CH3NH3PbCl3 on TiO2 compact layer coated over FTO glass using spin coating (rpm: 3000, time: 30 sec). For Every case I am getting droplets of the liquid of perovskite, no layer founds. I am doing the experiment in open air.
For sequential deposition the results are also the same during fabrication of the PbI2 on TiO2 compact layer.
Concentration of the CH3NH3PbX3: 20mg/ml to 50 mg/ml in DMF, DMSO. PbI2: 15mg/ml to 60mg/ml.
Layer is nor forming any cases.
What should I do????
moyez da ... kemon acho ? Perovskite topic er onno Q&A gulo dekhte paro: https://www.researchgate.net/topic/perovskites .... r calll koro ... kotha hobe
Hi, I have no experience on organic perovoskite material . But, I am working on Inorganic perovskite material to prepare thin film by using dip coating. so, I can tell you that after using spin coating or dip coating , you can put your thin film in the spin or dip coating equipment so that liquid layer is absorbed by your FTO glass substrate .then you can apply heat for 15 or 10 minutes below 100 degree . after that you can apply tube furnace .i hope , it will help you.
You can use our approach (Advanced Energy Materials 5, 1501354). The optimized amount of TBP from our latest results is 80ul in per ml DMF. I hope my answer is useful to you.
Hong
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