Performance enhancement of a thin film tungsten oxide based solid-state electrochromic device
Electrochromic devices for emissivity modulation hold immense promise for applications such as thermal management, dynamic optics, and radiative cooling. However, conventional all-solid-state electrochromic devices often suffer from slow switching speeds, limited optical contrast, and challenges in...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/adf8c6 |
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| _version_ | 1849234158681849856 |
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| author | Bimal Nepal Dominic Smith Dip Dutta Jacob Hannah Bikram Bhatia Sergio B Mendes |
| author_facet | Bimal Nepal Dominic Smith Dip Dutta Jacob Hannah Bikram Bhatia Sergio B Mendes |
| author_sort | Bimal Nepal |
| collection | DOAJ |
| description | Electrochromic devices for emissivity modulation hold immense promise for applications such as thermal management, dynamic optics, and radiative cooling. However, conventional all-solid-state electrochromic devices often suffer from slow switching speeds, limited optical contrast, and challenges in scalable fabrication. In this article, we report on the development and optimization of a high performance all-solid-state electrochromic device that addresses these limitations. The device exhibits significantly faster switching times of 8.2 s (coloring) and 3.1 s (bleaching), compared to the typical switching times of ∼20 s to a few minutes reported for similar solid-state electrochromic devices, marking a key advancement in emissivity modulation technology. Constructed using a stack of thin films—Au/NiO/Ta _2 O _5 /WO _3 /ITO—fabricated through RF magnetron sputtering, the device’s layers were meticulously optimized to reduce resistance while preserving essential optical properties. The device demonstrated a maximum reflectance modulation of about 50%–60% across a broad wavelength range from the visible to the infrared. Its all-solid-state thin-film construction ensures robust performance under high-temperature conditions, demonstrating potential for long-term stability and scalability in practical applications. These advancements position solid-state emissivity control devices as scalable and energy-efficient solutions for dynamic optics, thermal management, and emissivity-based radiative cooling. |
| format | Article |
| id | doaj-art-7124080d17d54f4ea6e2f8cc192fd6d4 |
| institution | Kabale University |
| issn | 2053-1591 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj-art-7124080d17d54f4ea6e2f8cc192fd6d42025-08-20T04:03:13ZengIOP PublishingMaterials Research Express2053-15912025-01-0112808570210.1088/2053-1591/adf8c6Performance enhancement of a thin film tungsten oxide based solid-state electrochromic deviceBimal Nepal0https://orcid.org/0009-0005-2229-0082Dominic Smith1Dip Dutta2Jacob Hannah3Bikram Bhatia4https://orcid.org/0000-0003-1537-3080Sergio B Mendes5https://orcid.org/0000-0002-9462-9058Department of Physics and Astronomy, University of Louisville , Louisville, KY, 40208, United States of AmericaDepartment of Physics and Astronomy, University of Louisville , Louisville, KY, 40208, United States of AmericaDepartment of Mechanical Engineering, University of Louisville , Louisville, KY, 40208, United States of AmericaDepartment of Physics and Astronomy, University of Louisville , Louisville, KY, 40208, United States of AmericaDepartment of Mechanical Engineering, University of Louisville , Louisville, KY, 40208, United States of AmericaDepartment of Physics and Astronomy, University of Louisville , Louisville, KY, 40208, United States of AmericaElectrochromic devices for emissivity modulation hold immense promise for applications such as thermal management, dynamic optics, and radiative cooling. However, conventional all-solid-state electrochromic devices often suffer from slow switching speeds, limited optical contrast, and challenges in scalable fabrication. In this article, we report on the development and optimization of a high performance all-solid-state electrochromic device that addresses these limitations. The device exhibits significantly faster switching times of 8.2 s (coloring) and 3.1 s (bleaching), compared to the typical switching times of ∼20 s to a few minutes reported for similar solid-state electrochromic devices, marking a key advancement in emissivity modulation technology. Constructed using a stack of thin films—Au/NiO/Ta _2 O _5 /WO _3 /ITO—fabricated through RF magnetron sputtering, the device’s layers were meticulously optimized to reduce resistance while preserving essential optical properties. The device demonstrated a maximum reflectance modulation of about 50%–60% across a broad wavelength range from the visible to the infrared. Its all-solid-state thin-film construction ensures robust performance under high-temperature conditions, demonstrating potential for long-term stability and scalability in practical applications. These advancements position solid-state emissivity control devices as scalable and energy-efficient solutions for dynamic optics, thermal management, and emissivity-based radiative cooling.https://doi.org/10.1088/2053-1591/adf8c6electrochromic deviceemissivity modulationRF magnetron sputteringtungsten oxidenickel oxidethin films |
| spellingShingle | Bimal Nepal Dominic Smith Dip Dutta Jacob Hannah Bikram Bhatia Sergio B Mendes Performance enhancement of a thin film tungsten oxide based solid-state electrochromic device Materials Research Express electrochromic device emissivity modulation RF magnetron sputtering tungsten oxide nickel oxide thin films |
| title | Performance enhancement of a thin film tungsten oxide based solid-state electrochromic device |
| title_full | Performance enhancement of a thin film tungsten oxide based solid-state electrochromic device |
| title_fullStr | Performance enhancement of a thin film tungsten oxide based solid-state electrochromic device |
| title_full_unstemmed | Performance enhancement of a thin film tungsten oxide based solid-state electrochromic device |
| title_short | Performance enhancement of a thin film tungsten oxide based solid-state electrochromic device |
| title_sort | performance enhancement of a thin film tungsten oxide based solid state electrochromic device |
| topic | electrochromic device emissivity modulation RF magnetron sputtering tungsten oxide nickel oxide thin films |
| url | https://doi.org/10.1088/2053-1591/adf8c6 |
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