Hello every one
Kindly, the required is to prepare thin films by chemical spray pyrolysis technique. The question is, can the deposition substrate temperature be chosen higher than the melting point of the depositted material?
Dear Jamal M. Rzaij , the deposition substrate temp can vary either higher or lower than the melting point. Though, it is important to note that the substrate surface temperature is the main parameter that determines the film morphology and properties. By increasing the temperature, the film morphology can change from a cracked to a porous microstructure. In many studies the deposition temperature was reported indeed as the most important spray pyrolysis parameter. The properties of deposited films can be varied and thus controlled by changing the deposition temperature, for instance, it influences optical and electrical properties. I would suggest you to go through the attached research paper for more insights.
It is better to keep the substrate temperature lower than the melting point of the required thin film material. By keeping lower temperature you can overcome the crack or voids on the thin film and also it is safe for substrate damage.
regards
AK
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