It was confirmed that the uniformity of the thin film increases when the solution precursor is aged and deposited.
By the way, what happens if the precursor is over-aged?
Ageing the solution precursor prior to thin film deposition can improve the resulting film's uniformity, often leading to enhanced crystallinity and better film quality. This is due to the fact that ageing allows for the complete dissolution of the solute and can promote partial reactions within the solution, leading to more homogeneous nucleation and growth when the thin film is deposited.
However, over-ageing the precursor can have several potential adverse effects:
In summary, while a certain amount of ageing can improve the uniformity of thin films, over-ageing can lead to a range of issues, including larger, more irregular particles, changes in crystallinity, solution instability, and even chemical degradation of the precursor. Therefore, finding the optimal ageing time for the precursor is crucial to yield the best thin film properties.
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