Fabrication of smart glass electrochromic device using rf magnetron sputtering
Electrochromic device is an important functional device to control the amount of light through a glass. It usually used in sunlight control window glazing for buildings and automobile. The important feature of electrochromic glass is the ability to response toward the apply voltage in shortest...
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Format: | Thesis |
Language: | English English English |
Published: |
2014
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Subjects: | |
Online Access: | http://eprints.uthm.edu.my/1722/2/24p%20SITI%20ASHRAF%20ABDULLAH.pdf http://eprints.uthm.edu.my/1722/1/SITI%20ASHRAF%20ABDULLAH%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/1722/3/SITI%20ASHRAF%20ABDULLAH%20WATERMARK.pdf |
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Summary: | Electrochromic device is an important functional device to control the amount of light
through a glass. It usually used in sunlight control window glazing for buildings and
automobile. The important feature of electrochromic glass is the ability to response
toward the apply voltage in shortest time, and endurance to maintain in color shape after
apply voltage. In this thesis, the oxygen gas percentage is optimized during the
fabrication of tungsten trioxide (WO3) as an electrochromic glass for window glazing
application by using RF magnetron sputtering. The oxygen flow rate for the deposition
is varied from 10sccm -22sccm which is 25%, 27%, 30%, and 35% of oxygen flow. The
structures of WO3 were investigated using X-Ray diffraction, Field effect scanning
electron microscopy (Fe-Sem) and Atomic force microscopy (AFM). The
electrochromic properties were characterized by a cyclic voltammogram and UV-Vis
absorption spectra. The results show that nanocrystalline film with particle size of
51.54nm was deposited at 27% oxygen flow rate has the largest charge capacity and
coloration efficiency among the others. The time respond taken for complete coloration
at 4V is 2second. This result is a starting point for future work such as optimizing the
film thickness or doping by other metals. |
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