I have prepared rGO/In₂O₃ composite thin films using a paste formulation of ethyl cellulose and α-terpineol. The films were spin-coated onto a glass substrate, followed by an initial heating step on a hot plate at 350°C. This process was repeated for multiple layers to achieve the desired thickness. After deposition, the films were annealed at 350°C for 3 hours on a hot plate to remove the binder and improve adhesion.
However, I am experiencing a film peeling issue, where the coated layers detach from the glass substrate after annealing. I would like to understand the possible reasons behind this problem and how to improve film adhesion.
Potential factors I am considering:
I would appreciate any insights or recommendations on how to prevent film peeling and improve the stability of the rGO/In₂O₃ thin films.
Dear Tanya Sood
In simple, it is a familiar issue caused by applying non-feasible thermal treatment protocol . First, leave the hot plate and use a controlled heating oven instead. This will eliminate the negative effects of the thermal and physical stresses induced at the interface between the substrate and the thin film coating. Now, the heating up rate also should be controlled as slow as possible to save the time required for the decomposition products to diffused outward with a minimum side effects on the integrity of whole coating structure and remember that the first coating layer according yo your protocol will annealed many times equal to the number of coating to reach the final thickness, which means you induce excessive stress on the whole coating system. So this point should considered carefully. Best regards....