Grid patterned VO2 thermochromic coatings
VO2 has garnered much attention in recent years as a promising candidate for thermochromic window applications due to rising awareness for energy conservation. Many different methods to synthesize affordable, cost-efficient, and high performance VO2 – based films have been developed over the past...
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| Other Authors: | |
| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
2016
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| Online Access: | http://hdl.handle.net/10356/66406 |
| _version_ | 1826111659833294848 |
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| author | Lu, Qi |
| author2 | Long Yi |
| author_facet | Long Yi Lu, Qi |
| author_sort | Lu, Qi |
| collection | NTU |
| description | VO2 has garnered much attention in recent years as a promising candidate for
thermochromic window applications due to rising awareness for energy conservation.
Many different methods to synthesize affordable, cost-efficient, and high performance VO2
– based films have been developed over the past few years, including but not limited to
sputtering, physical vapor deposition, chemical vapor deposition, etc. However, the tradeoff
between improving luminous transmittance (Tlum) and solar modulation ability (ΔTsol)
obstructs the commercialization of VO2-based smart windows. Previous studies of
nanocomposite, nanoporous, biomimetic nanostructuring, anti-reflection coatings (ARC)
and hybrid have been directed towards enhancing both Tlum and ΔTsol simultaneously. This
work, for the first time, demonstrates a novelty approach that incorporates periodic grid
structure of VO2 by using screen printing meshes. The effects of VO2 concentration,
thickness, and mesh size on film’s performance were investigated, and the optimal
combinations of the three factors were identified. Experimental results demonstrate that
grid-patterning allows for formation of thicker coating with higher luminous transmittance
and solar modulation performance (grid-pattern: Tlum = 67%, ΔTsol = 8.8%, continuous film:
Tlum = 60%, ΔTsol = 6.9%). The best result obtained shows excellent solar modulation
ability (14.9%) for a moderate transmittance level (43.3%), which is comparable to some
of the best reported results. |
| first_indexed | 2024-10-01T02:54:26Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/66406 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:54:26Z |
| publishDate | 2016 |
| record_format | dspace |
| spelling | ntu-10356/664062023-03-04T15:39:20Z Grid patterned VO2 thermochromic coatings Lu, Qi Long Yi School of Materials Science and Engineering DRNTU::Engineering VO2 has garnered much attention in recent years as a promising candidate for thermochromic window applications due to rising awareness for energy conservation. Many different methods to synthesize affordable, cost-efficient, and high performance VO2 – based films have been developed over the past few years, including but not limited to sputtering, physical vapor deposition, chemical vapor deposition, etc. However, the tradeoff between improving luminous transmittance (Tlum) and solar modulation ability (ΔTsol) obstructs the commercialization of VO2-based smart windows. Previous studies of nanocomposite, nanoporous, biomimetic nanostructuring, anti-reflection coatings (ARC) and hybrid have been directed towards enhancing both Tlum and ΔTsol simultaneously. This work, for the first time, demonstrates a novelty approach that incorporates periodic grid structure of VO2 by using screen printing meshes. The effects of VO2 concentration, thickness, and mesh size on film’s performance were investigated, and the optimal combinations of the three factors were identified. Experimental results demonstrate that grid-patterning allows for formation of thicker coating with higher luminous transmittance and solar modulation performance (grid-pattern: Tlum = 67%, ΔTsol = 8.8%, continuous film: Tlum = 60%, ΔTsol = 6.9%). The best result obtained shows excellent solar modulation ability (14.9%) for a moderate transmittance level (43.3%), which is comparable to some of the best reported results. Bachelor of Engineering (Materials Engineering) 2016-04-01T08:49:21Z 2016-04-01T08:49:21Z 2016 Final Year Project (FYP) http://hdl.handle.net/10356/66406 en Nanyang Technological University 43 p. application/pdf |
| spellingShingle | DRNTU::Engineering Lu, Qi Grid patterned VO2 thermochromic coatings |
| title | Grid patterned VO2 thermochromic coatings |
| title_full | Grid patterned VO2 thermochromic coatings |
| title_fullStr | Grid patterned VO2 thermochromic coatings |
| title_full_unstemmed | Grid patterned VO2 thermochromic coatings |
| title_short | Grid patterned VO2 thermochromic coatings |
| title_sort | grid patterned vo2 thermochromic coatings |
| topic | DRNTU::Engineering |
| url | http://hdl.handle.net/10356/66406 |
| work_keys_str_mv | AT luqi gridpatternedvo2thermochromiccoatings |