Thermochromism of vanadium dioxide films controlled by the thickness of ZnO buffer layer under low substrate temperature
Thermochromism of vanadium dioxide films controlled by the thickness of ZnO buffer layer under low substrate temperature
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低温下ZnO缓冲层厚度控制二氧化钒薄膜的热致变色
DOI：
10.1016/j.jallcom.2018.01.066
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发表时间：
2018-04
影响因子：
6.2
通讯作者：
Zhang Dongping
中科院分区：
文献类型：
--
作者：
Zhu Maodong;Qi Hongji;Wang Bin;Wang Hu;Guan Tianrui;Zhang Dongping
在320 °C低温下，采用直流磁控溅射法在ZnO/钠钙玻璃衬底上制备了高质量的VO 2热致变色薄膜。采用ZnO多晶薄膜作为VO 2薄膜与玻璃衬底之间的缓冲层，提高了VO 2薄膜的热致变色性能。XRD、拉曼光谱、SEM和可见-红外光谱分析结果表明，ZnO缓冲层的厚度对VO 2薄膜的物理性能和热致变色性能有显著影响。通过采用不同厚度的ZnO缓冲层，可以将所有VO 2薄膜的表面形貌分为三组。与原始样品相比，具有薄缓冲层（56 nm）的膜表现出弱结晶性、低相温度和低太阳能调制性。然而，VO 2薄膜的结晶度和太阳能转换效率显着增加的缓冲层的厚度进一步增加（厚于56 nm）。计算得到的具有235 nm厚ZnO缓冲层的VO 2薄膜的太阳能调制率约为13.11%，这可能有利于VO 2薄膜在智能节能窗中的应用。
High-quality vanadium dioxide (VO2) thermochromic thin films were fabricated on ZnO/soda-lime glass via direct current magnetron sputtering at a low temperature of 320 °C. The ZnO polycrystalline film was used as a buffer layer between glass substrate and VO2film to improve the thermochromic property of VO2film. The results of XRD, Raman spectrum, SEM and visible-infrared spectrum indicated that the thickness of the ZnO buffer layer has a significant effect on the physical and thermochromic performances of VO2films. The surface morphologies of all VO2films can be divided into three groups by employing ZnO buffers with different thicknesses. The film with thin buffer (56 nm) exhibited a weak crystallinity, low phase temperature and low solar energy modulability compared with the pristine sample. However, the crystallinity and solar switching efficiency of VO2films noticeably increased as the thickness of the buffer layer increased further (thicker than 56 nm). The calculated modulability of solar energy of the VO2film with a 235-nm thick ZnO buffer layer is about 13.11%, which may be beneficial in the application of VO2films for smart energy-efficient windows.
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