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conferenceseries
.com
November 13-15, 2017 | Las Vegas, USA
14
th
International Conference and Exhibition on
Materials Science and Engineering
RRJOMS | Volume 5 | Issue 7 | November, 2017
A new conductive material for energy efficient window applications
Xiyue Zhou, Yucen Liu
and
Guowen Ding
De Anza College, California, USA
S
ilver-based and TiN based thin film glass coatings with thicknesses of tens of nanometers are widely used in today's energy-
efficient building windows. However, there is no Ag-Ti alloy thin film coating on optical coating applications reported. In this
study, Ag-Ti alloy from 10nm to 40nm thin film was deposited by a co-sputter technique at a magnetron sputter system with three
sputtering target guns in a high vacuum chamber. The chamber base pressure is 4x10
-7
Torr, and the films were deposited at 3 mTorr.
The Ag to Ti ratio in AgTi alloy was controlled by the two independent pulsed-DC power suppliers, from 50W to 200W during the
sputtering deposition. The Ag-Ti alloy single thin film refractive index (n,k) were measured by a Woollam ellipsometer combined
with a Shimadzu 3700 UV-Vis-NIR spectrometer (300nm to 2500nm), and the optical properties of the new nanoscale thin film
materials Ag-Ti alloys are the first time reported. The alloy Ag-Ti refractive index was strongly dependent on its resistivity, which
was calculated from the resistance measured by a four-point probe and the film thickness measured by the ellipsometer. The third
target in the chamber is Si target, which is used for the thin film Si
3
N
4
deposition by reactive sputtering Si target under Ar-N
2
mixed
gas at 3 mTorr. The thin film stack of Si
3
N
4
/Ag-Ti/Si
3
N
4
on glass was simulated for the optical performance optimization to guide
the experiments, and the transmittance of (40 nm Si
3
N
4
/ 20 nm Ag-Ti / 12 nm Si
3
N
4
/ glass) on glass could be 40%~50%, and those
performances are comparable to many energy efficient window products on the market today, on the other hand, such a tri-layer
simple stack showed the potential benefits of lower production costs.
Biography
Xiyue Zhou and Yucen Liu are students at De Anza College, California, USA. They used a modern nano-thin film deposition research system to study new conductive
materials, and characterized the optical properties of these new materials, which were the first reported, and could be used other optical applications; under the guidance
of Dr. Ding, they used these new materials to develop new energy-efficient windows prototype products.
dingguowen@yahoo.comXiyue Zhou et al., Res. Rev. J Mat. Sci. 2017, 5:7
DOI: 10.4172/2321-6212-C1-012