{"title":"用于热致变色散热器的具有大发射率可调性的金字塔结构vo2基薄膜","authors":"Yifan Sun, Guoliang Chen, Qingze Chen, Haoyang Fu, Benzhi Min, Zhengwei Tao, Tongtong Yue, Junming Zhao, Jun Qiu","doi":"10.1016/j.jqsrt.2024.109325","DOIUrl":null,"url":null,"abstract":"Structure-engineering has proven successful in enhancing the thermochromic properties of VO<ce:inf loc=\"post\">2</ce:inf>-based film for smart thermal management under dynamic thermal loads. However, traditional multilayer structures based on interlayer interference and grating structures based on resonance effect exhibit certain wavelength selectivity, thereby hindering broadband absorption. This limitation constrains the improvement of high temperature integrated emissivity (<ce:italic>ε</ce:italic><ce:inf loc=\"post\">H</ce:inf>), posing great challenges for achieving greater average emissivity tunability (Δ<ce:italic>ε</ce:italic>=<ce:italic>ε</ce:italic><ce:inf loc=\"post\">H</ce:inf>-<ce:italic>ε</ce:italic><ce:inf loc=\"post\">L</ce:inf>). In this work, we propose a VO<ce:inf loc=\"post\">2</ce:inf>-based 3D pyramid structured film by combining the multilayer structure with the grating structure, achieving an unprecedented high emissivity tunability Δ<ce:italic>ε</ce:italic> reaching 0.68. Based on the Magneto-polaron (MP) resonance effect, high absorption over a wide spectral range at high temperature is achieved, with <ce:italic>ε</ce:italic><ce:inf loc=\"post\">H</ce:inf> of 0.954. Through optimizing the VO<ce:inf loc=\"post\">2</ce:inf> thickness <ce:italic>δ</ce:italic> to 30 nm and tilt angle <ce:italic>β</ce:italic> to 80° respectively, we achieve optimal thermochromic performance of the film. Compared with conventional multilayer and grating regimes, the pyramid textured structure proposed in this work demonstrates a larger design space, which can be a reference for the design and optimization of spacecraft thermal control skin.","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"319 1","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Pyramid-structured VO2-based thin films with large emissivity tunability for thermochromic radiators\",\"authors\":\"Yifan Sun, Guoliang Chen, Qingze Chen, Haoyang Fu, Benzhi Min, Zhengwei Tao, Tongtong Yue, Junming Zhao, Jun Qiu\",\"doi\":\"10.1016/j.jqsrt.2024.109325\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Structure-engineering has proven successful in enhancing the thermochromic properties of VO<ce:inf loc=\\\"post\\\">2</ce:inf>-based film for smart thermal management under dynamic thermal loads. However, traditional multilayer structures based on interlayer interference and grating structures based on resonance effect exhibit certain wavelength selectivity, thereby hindering broadband absorption. This limitation constrains the improvement of high temperature integrated emissivity (<ce:italic>ε</ce:italic><ce:inf loc=\\\"post\\\">H</ce:inf>), posing great challenges for achieving greater average emissivity tunability (Δ<ce:italic>ε</ce:italic>=<ce:italic>ε</ce:italic><ce:inf loc=\\\"post\\\">H</ce:inf>-<ce:italic>ε</ce:italic><ce:inf loc=\\\"post\\\">L</ce:inf>). In this work, we propose a VO<ce:inf loc=\\\"post\\\">2</ce:inf>-based 3D pyramid structured film by combining the multilayer structure with the grating structure, achieving an unprecedented high emissivity tunability Δ<ce:italic>ε</ce:italic> reaching 0.68. Based on the Magneto-polaron (MP) resonance effect, high absorption over a wide spectral range at high temperature is achieved, with <ce:italic>ε</ce:italic><ce:inf loc=\\\"post\\\">H</ce:inf> of 0.954. Through optimizing the VO<ce:inf loc=\\\"post\\\">2</ce:inf> thickness <ce:italic>δ</ce:italic> to 30 nm and tilt angle <ce:italic>β</ce:italic> to 80° respectively, we achieve optimal thermochromic performance of the film. Compared with conventional multilayer and grating regimes, the pyramid textured structure proposed in this work demonstrates a larger design space, which can be a reference for the design and optimization of spacecraft thermal control skin.\",\"PeriodicalId\":16935,\"journal\":{\"name\":\"Journal of Quantitative Spectroscopy & Radiative Transfer\",\"volume\":\"319 1\",\"pages\":\"\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2024-12-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Quantitative Spectroscopy & Radiative Transfer\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1016/j.jqsrt.2024.109325\",\"RegionNum\":3,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"OPTICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Quantitative Spectroscopy & Radiative Transfer","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1016/j.jqsrt.2024.109325","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
Pyramid-structured VO2-based thin films with large emissivity tunability for thermochromic radiators
Structure-engineering has proven successful in enhancing the thermochromic properties of VO2-based film for smart thermal management under dynamic thermal loads. However, traditional multilayer structures based on interlayer interference and grating structures based on resonance effect exhibit certain wavelength selectivity, thereby hindering broadband absorption. This limitation constrains the improvement of high temperature integrated emissivity (εH), posing great challenges for achieving greater average emissivity tunability (Δε=εH-εL). In this work, we propose a VO2-based 3D pyramid structured film by combining the multilayer structure with the grating structure, achieving an unprecedented high emissivity tunability Δε reaching 0.68. Based on the Magneto-polaron (MP) resonance effect, high absorption over a wide spectral range at high temperature is achieved, with εH of 0.954. Through optimizing the VO2 thickness δ to 30 nm and tilt angle β to 80° respectively, we achieve optimal thermochromic performance of the film. Compared with conventional multilayer and grating regimes, the pyramid textured structure proposed in this work demonstrates a larger design space, which can be a reference for the design and optimization of spacecraft thermal control skin.
期刊介绍:
Papers with the following subject areas are suitable for publication in the Journal of Quantitative Spectroscopy and Radiative Transfer:
- Theoretical and experimental aspects of the spectra of atoms, molecules, ions, and plasmas.
- Spectral lineshape studies including models and computational algorithms.
- Atmospheric spectroscopy.
- Theoretical and experimental aspects of light scattering.
- Application of light scattering in particle characterization and remote sensing.
- Application of light scattering in biological sciences and medicine.
- Radiative transfer in absorbing, emitting, and scattering media.
- Radiative transfer in stochastic media.