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Fig. 8 Cu sheet coated with a
silazane and heat treated at
500
°
C for 1 h in air
the surface regarding hydrophilicity. The contact angle of such a coated glass
substrate to water is less than 10
(Fig.
9
). This anti-fog coating offers interesting
potential in a broad range of applications, from mirrors in bathrooms to automotive
windshields. Recently, it has been shown that the surface energy of silazane-based
coatings can be systematically controlled by controlled heat treatment (Wang et al.
2012
,
2013
).
The high reactivity of silazane-based coatings with moisture allows for the
transformation into glasslike SiO
x
coatings at very low temperatures of up to
200
°
nthner et al.
2012
; Wang et al.
2013
). This behavior leads not only to an
increase in hardness and chemical stability, but also to special optical properties.
Recently, a coating system on the basis of silazanes with a high emissivity for
fl
°
C(G
ü
flexible thin-
lm solar cells consisting of Cu(In,Ga)Se
2
(CIGSe) on polyimide was
Fig. 9 Superhydrophilicity and resulting anti-fog coating on the basis of silazanes on glass
substrates
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