I have deposited Molybdenum bilayer on SLG. During CdS deposition, I found that Molybdenum peel off from the substrate. What might be the reason? How can I improve the adhesion between Mo and SLG?
If you have plasma generator device, then you can do plasma radiation on SLG before doing the CdS deposition. Hopefully, your CdS deposition will more strong and stable.
No Sir... I deposit CdS layer on CZTS layer which is deposited on the Mo bilayer.. But the solution contains ammonia with CdCl2...
MoS2, like Ws2, MoSe2 and WSe2 can have to orientations on glass substrates.
Type A or type I: this type has a lamellar structure with the c-axis parallell to the substrate.
Type B or type II: in this type the c-axis is predominatly perpendicular to the substrate.
Type A is favourable for solar cells due to the better adhesion and better electrical properties of the films.
See
Applied Surface Science 65/66 (1993) 465-472 and 70/71 (1993) 731-736
Thin Solid Films 387 (2001) 118-122
Peeling of CIGS films was investigated very thoroughly in the 90's and early 2000's and a number of relationships between sulfurisation temperature, pressure, pH value etc were investigated, depending on the CIGS system.
NREL has published a number of excellent reports concerning this topic:
Process R&D for CIS-Based Thin-Film, http://www.nrel.gov/docs/fy06osti/38805.pdf
Another interesting publication is
Thin Solid Films 516 (2008) 2188–2194
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