Improving the thermochromic performance of VO2 films by embedding Cu-Al nanoparticles as heterogeneous nucleation cores in the VO2/VO2 bilayer structure

被引:0
作者
Zong, Haitao [1 ]
Liu, Zhiguo [1 ]
Li, Ming [1 ]
Chen, Houchang [1 ]
Tao, Xinchun [1 ]
Yin, Yuehong [1 ]
Wang, Wei [2 ]
Zhang, Cong [1 ]
Qiao, Wentao [1 ]
Yan, Lingling [1 ]
Sun, Bai [3 ]
机构
[1] Henan Polytech Univ, Sch Phys & Elect Informat Engn, Jiaozuo 454003, Peoples R China
[2] Henan Polytech Univ, Sch Emergency Management, Jiaozuo 454003, Peoples R China
[3] Anhui Jianzhu Univ, Anhui Inst Strateg Study Carbon Emiss Peak & Carbo, Hefei 230022, Peoples R China
关键词
Vanadium dioxide; Cu-Al nanoparticles; Luminous transmittance; Solar modulation ability; Heterogeneous nucleation; METAL-INSULATOR-TRANSITION; HIGH LUMINOUS TRANSMITTANCE; PHASE-TRANSITION; OPTICAL DESIGN; SMART COATINGS; SURFACE; TEMPERATURE; FABRICATION; ABILITY;
D O I
10.1016/j.infrared.2024.105620
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
VO2-based films show great potential applications in thermochromic smart windows. However, enhancing luminous transmittance ( T lum ) while maintaining high solar modulation ability ( d T sol ) remains a formidable challenge. Here, we present a novel VO2/Cu-Al nanoparticles (NPs)/VO2 composite film structure, seamlessly integrating Cu-Al bimetallic NPs within VO2 films by pulsed laser deposition on alkali-free glass substrates. The content of Cu-Al NPs in the composite films is controlled by the pulse number (Np) applied to the Cu-Al alloy target. X-ray diffraction results indicate that the crystallinity of VO2 films is significantly enhanced by the incorporation of an appropriate amount of Cu-Al NPs. The SEM characterization results revealed that the particle size of VO2 composite films initially increases to approximately 131 nm and subsequently decreases to around 120 nm as Np increases, with a concurrent transition in particle shape from quasi-circular to elongated. The T lum and d T sol of the resulting composite films were dramatically improved to 71.6 % and 9.5 %, respectively, when Np was 300. These enhanced thermochromic properties are attributed to the localized surface plasmon resonance (LSPR) of the VO2 particles. This research opens up a promising avenue for the convenient production of customized high-quality VO2 films tailored for smart window applications.
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页数:11
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