Hello everyone, I want to grow thin film on FTO using hydrothermal but the medium is highly basic so FTO looses even its own stability and tore down into small pieces. Now my question ' is there any most stable substrate that could even stable in highly basic conditions? because my sample with specific morphology could be obtained hydrothermally in highly basic medium like 16M KOH solution. If anyone could give some suggestions will be highly appreciated. Thank you
Sir, Could you give some scientific reasons for your suggestions please?
Is your FTO on glass, or quartz, or something else? Are you saying your substrate simply loses its conductivity or completely falls apart?
This is just a guess because I've never used FTO in solutions so basic, but my first attempt would be to apply a TiO2 blocking layer to the FTO.
My FTO is on glass and its layer completely torn away into pieces.
Hi Jafar,
OK. In case you're interested in trying this: The way I would make a TiO2 blocking layer on FTO-glass is as follows. 1. Prepare 40 mM TiCl4 solution. To do this, add the TiCl4 dropwise from a syringe into cold water. The water should stay clear at this point. 2. Heat the solution to 70 C and immerse the FTO-glass for 30 minutes. The thin layer of TiO2 formed may offer some protection and should not impede charge carriers. The potential usefulness of this probably depends on the compatibility of your desired thin film with TIO2.
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