What is the modified doctor blade technique?
Conference Paper Preparation of TiO2 thin film using modified doctor-blade me...
Hi Bulkesh,
In order to make photo anodes in DSSC, screen printing technique is the standard and best one so far. Which will give somewhat high efficiency compared to other techniques.
The second best option is Doctor blade method, with this you can control thickness by manually. This will also helpful to get considerable efficiency.
But remember that, in these two methods making paste is crucial segment.
Apart from these two techniques, researchers have tried other methods like Electrophoretic deposition, Electro spinning method, by spray and also direct growth of 1-D TiO2 nanostructures on FTO substrate and so on. With these techniques efficiencies are around approximately 6-7%
Anyway first two techniques are the most preferable, because of flexibility in optimizing the thickness and an active area for illumination.
If you have facility of screen printing technique go for it, otherwise doctor blade method is also decent.
_All the best......
_Thanks,
Chandrasekhar.
spraying is also possible and it gives more uniform film when optimized.
Dear Friend
I always suggest spin coating method for a limited active area.
I have tried doctor blading a lot of times and usually the film obtained is uniform if the paste contains right mixture. Spraying helps to control the thickness in a better way but doctor blading gives uniformity.
screen printing technique is the best one for a uniform film and also for high porosity.
doctor blade means i am appying the paste with hand on ITO by optimising its area with scotch tape.
I think the spin coating method is better than doctor blade method
Regards
Maytham
Form my knowledge,Spin coating method is more preferable.
Thank You
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