Combinatorial exploration of thermochromic thin films in V-M1-M2-O systems

V-M1-M2-O系统中热致变色薄膜的组合探索

• 批准号: 463914389
• 负责人: Professor Dr.-Ing. Alfred Ludwig
• 金额: --
• 依托单位: Lehrstuhl Neue Materialien und Grenzflächen (MDI)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/463914389?language=en
• 关键词: Combinatorial; exploration; thermochromic; thin; films

This project addresses the exploration of VO2-based thermochromic thin films in V-M1-M2-O systems (M1, M2: e.g. W, Mg, Er, Li) for future application in smart windows. Films to be developed will show high luminous transmittance (Tlum) and solar irradiation modulation (ΔTsol) upon a reversible phase transformation around room temperature. Addition of third elements can decrease the transition temperature (Tc) and improve the thermochromic performance (Tlum and ΔTsol) of VO2-based phases: e.g. W can effectively decrease Tc of VO2 (68°C), but Tlum and ΔTsol are deteriorated; alkaline and rare-earth metals improve Tlum but do not lower substantially Tc. Therefore, a multidimensional search space needs to be explored in order to identify a new multinary material which fulfils all necessary requirements. Thus, to achieve better performance of VO2-based thin films for smart windows, first, V-M1-O systems with unexplored elements for M1 will be investigated in search for elements which reduce Tc and improve Tlum. Then, quaternary systems (V-M1-M2-O) will be explored: synergistic effects of M1 and M2 on the thermochromic properties of VO2 are expected, to achieve lower Tc and higher Tlum. This needs a large experimental dataset which will be accomplished by synthesis of combinatorial materials libraries and their high-throughput characterization. The best identified systems will additionally be fabricated as nanoporous films by glancing angle deposition in order to further enhance Tlum, and a protective antireflective coating will be applied to further optimize Tlum.

该项目介绍了在V-M1-M2-O系统（M1，M2：E.G. W，MG，MG，ER，LI）中对基于VO2的热色素薄膜的探索，以在智能窗口中使用。要开发的薄膜将在室温周围可逆的相变时显示高发光透射（TLUM）和太阳照射调制（ΔTSOL）。第三个元素的添加可以降低基于VO2的相位的过渡温度（TC）并改善基于VO2的阶段的热色度性能（TLUM和ΔTSOL）：例如W可以有效地降低Vo2（68°C）的TC，但可以确定tlum和Δtsol。酒精和稀土金属改善了TLUM，但没有基本降低TC。因此，需要探索多维搜索空间，以确定满足所有必要要求的新的多元材料。为了使智能窗口的基于VO2的薄膜更好地性能，首先将研究具有M1意外元素的V-M1-O系统，以搜索减少TC并改善TLUM的元素。然后，将探索第四纪系统（V-M1-M2-O）：预计M1和M2对VO2热染料性能的协同作用，将实现较低的TC和较高的TLUM。这需要一个大型的实验数据集，该数据集将通过合成组合材料库及其高通量表征来完成。最佳确定的系统还将通过扫视角度沉积以进一步增强TLUM来制造为纳米多孔膜，并将应用保护性抗反射涂层以进一步优化TLUM。