Hi Everyone,
Hope you are doing well. I am trying to fabricate perovskite solar cells based on nip configuration structure. After patterning FTO Glass slides with Zn and 2M HCL, I am using heat-resistant Kapton tape to mask the targeted areas shown in the figure attached to spin coat subsequent layers. I have the following questions related to the fabrication process:
1: Does Kapton tape adhesive deposited on FTO and Etched side effect charge carrier collection and transportation to the contacts?
2: If yes, how can I remove the adhesive residue of Kapton tape without damaging the perovskite absorber layer?
3: Is there any other way to prevent the deposition of layers on bare FTO and etched surfaces?
Thank you for your time. I really appreciate your help!
wash with detergent removing the tape. use your fingers softly for washing.
after deposition, you can clean the FTO side with Chlorobenzene and Methoxymethanol using a cotton swab.
Leyden, Matthew R., Luis K. Ono, Sonia R. Raga, Yuichi Kato, Shenghao Wang, and Yabing Qi. "High performance perovskite solar cells by hybrid chemical vapor deposition." Journal of Materials Chemistry A 2, no. 44 (2014): 18742-18745.
Dear Abdul Sattar ,
It is so that it is required to keep all solar cell layers free from contamination. So, when pulling up the Kapton tape some adhesive residual must remains sticking on the surface. These residuals must be completely eliminated by selective chemical etching. In the sense you have to use selective etching materials for the adhesive residuals only.
It you could not find any selective etching solution then you have to use other method.
For example you can deposit your layer on the whole surface and then remove the unwanted areas of the intended layer by a photolithographic and selective etching step. Such step is used routinely in the fabrication of integrated circuits and electron devices.
My answer is a conceptual answer that may guide you to solve your problem.
best wishes
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