Reconfigurable low-emissivity optical coating using ultrathin phase change materials
A method for controlling the optical properties of a solid-state film over a broad wavelength range is highly desirable and could have significant commercial impact. One such application is smart glazing technology where near-infrared solar radiation is harvested in the winter and reflected it in th...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
American Chemical Society
2021
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| _version_ | 1797108423401144320 |
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| author | Youngblood, N Talagrand, C Porter, BF Galante, CG Kneepkens, S Triggs, G Sarwat, SG Yarmolich, D Bonilla, RS Hosseini, P Taylor, RA Bhaskaran, H |
| author_facet | Youngblood, N Talagrand, C Porter, BF Galante, CG Kneepkens, S Triggs, G Sarwat, SG Yarmolich, D Bonilla, RS Hosseini, P Taylor, RA Bhaskaran, H |
| author_sort | Youngblood, N |
| collection | OXFORD |
| description | A method for controlling the optical properties of a solid-state film over a broad wavelength range is highly desirable and could have significant commercial impact. One such application is smart glazing technology where near-infrared solar radiation is harvested in the winter and reflected it in the summer─an impossibility for materials with fixed thermal and optical properties. Here, we experimentally demonstrate the first spectrally tunable, low-emissivity coating using a chalcogenide-based phase-change material (Ge20Te80), which can modulate the solar heat gain of a window while maintaining neutral-coloration and constant transmission of light at visible wavelengths. We additionally demonstrate the controlled transfer of absorbed near-infrared energy to far-infrared radiation, which can be used to heat a building’s interior and show fast, sub-millisecond switching using transparent electrical heaters integrated on glass substrates. These combined properties result in a smart window that is efficient and aesthetically pleasing─crucial for successful adoption of green technology. |
| first_indexed | 2024-03-07T07:29:01Z |
| format | Journal article |
| id | oxford-uuid:82f2f32d-1d4c-422c-bf19-c37e687b0cef |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:29:01Z |
| publishDate | 2021 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | oxford-uuid:82f2f32d-1d4c-422c-bf19-c37e687b0cef2022-12-19T09:44:46ZReconfigurable low-emissivity optical coating using ultrathin phase change materialsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:82f2f32d-1d4c-422c-bf19-c37e687b0cefEnglishSymplectic ElementsAmerican Chemical Society2021Youngblood, NTalagrand, CPorter, BFGalante, CGKneepkens, STriggs, GSarwat, SGYarmolich, DBonilla, RSHosseini, PTaylor, RABhaskaran, HA method for controlling the optical properties of a solid-state film over a broad wavelength range is highly desirable and could have significant commercial impact. One such application is smart glazing technology where near-infrared solar radiation is harvested in the winter and reflected it in the summer─an impossibility for materials with fixed thermal and optical properties. Here, we experimentally demonstrate the first spectrally tunable, low-emissivity coating using a chalcogenide-based phase-change material (Ge20Te80), which can modulate the solar heat gain of a window while maintaining neutral-coloration and constant transmission of light at visible wavelengths. We additionally demonstrate the controlled transfer of absorbed near-infrared energy to far-infrared radiation, which can be used to heat a building’s interior and show fast, sub-millisecond switching using transparent electrical heaters integrated on glass substrates. These combined properties result in a smart window that is efficient and aesthetically pleasing─crucial for successful adoption of green technology. |
| spellingShingle | Youngblood, N Talagrand, C Porter, BF Galante, CG Kneepkens, S Triggs, G Sarwat, SG Yarmolich, D Bonilla, RS Hosseini, P Taylor, RA Bhaskaran, H Reconfigurable low-emissivity optical coating using ultrathin phase change materials |
| title | Reconfigurable low-emissivity optical coating using ultrathin phase change materials |
| title_full | Reconfigurable low-emissivity optical coating using ultrathin phase change materials |
| title_fullStr | Reconfigurable low-emissivity optical coating using ultrathin phase change materials |
| title_full_unstemmed | Reconfigurable low-emissivity optical coating using ultrathin phase change materials |
| title_short | Reconfigurable low-emissivity optical coating using ultrathin phase change materials |
| title_sort | reconfigurable low emissivity optical coating using ultrathin phase change materials |
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