Simple UV-Ozone treatment of the glass slides for 10-15 minutes should be enough to make good films on them provided your perovskite solution is fully dissolved.

For UV and PL, you can use quartz glass instead.

What I did, was simply to slightly melt the perovskite solid on glass slides on hotplate.

Do you expect the film to be polycrystalline? With "spin coating" it ought to be. Please post some references for the material composition when convenient.

What XRD equipment do you intend to use? What's the objective?

I confess, I'm a bit confused :-) I need to learn better! Thanks!

By "perovskite", do you mean "Perovskite is a calcium titanium oxide mineral composed of calcium titanate, with the chemical formula CaTiO3" (according to Google)? Or, just the structure?

I've looked at LaO/LaNdNiO and STO/STCO combinations at MIT which I believe are also called perovskites or related. Please clarify!

https://www.flickr.com/photos/85210325@N04/11604959265/in/set-72157645018820696

UV-Ozone treatment of the glass slides for about 20 minutes should be enough to make good films on them provided your perovskite solution is dissolved.

Kept the glass substrates at a temperature  one third of the boiling temperature of the perovskite compound. Except to study optical and electrical properties, you can deposit the films on any crystalline substrate like Si, ITO, BaTiO3 etc to get good adhesion. The questioner have not mention the methods of deposition of perovskite film. If it is by r.f. sputtering or PLD you can get good adhesion and composition by keeping the substrates at reasonable temperatures.  

Thanks a lot

I am using spin coating technique

Film/substrate adhesion will depend on several factors. Some of these factor will be:

• Crystallographic lattice compatibility of film & substrate
• Surface roughness of substrate
• Deposition method
• Substrate & ambient temperature
• Buffer layers used
• and more

I'm new to this subject of perovskite, so bare with my temporary lack of understanding :-)

Vishal! What is the expected Nano structure of the film? Please indicate the exact chemistry of both the film and substrate. Post some reference literature if possible for your specific materials.

Silane modifications enhance the adhesion strength. There are different types of silane coupling agents available commercially according to our requirements.  Please go through below link. This article might be helpful. 

http://www.sciencedirect.com/science/article/pii/S0032386116301227