[introduction]


At present, building energy consumption (including heating, ventilation, refrigeration and lighting) accounts for about 30-40% of the world's energy consumption. Electrochromic glass has become one of the green technologies to reduce building energy consumption by dynamically controlling the transmittance of sunlight. In recent years, new electrochromic glasses that can selectively regulate visible light and heat have become a research hotspot. This new electrochromic glass can realize the independent control of visible light and heat, so as to further optimize the energy efficiency of buildings and reduce the energy consumption of buildings. However, this new electrochromic glass is still in the initial stage of research, and there are still many problems, such as: (1) high cost; (2) Complex material preparation process; (3) Poor selectivity between visible light and heat (4) poor electrochromic performance (lower light modulation range, longer response time and shorter cycle life).


[introduction to achievements]


Recently, the research group of Professor Lee Jim Yang of the National University of Singapore reported a dual band electrochromic glass based on al3+ embedded / embedded drive. This dual band electrochromic glass can not only realize effective independent control of visible light and heat (near-infrared), but also show excellent electrochromic performance - high light modulation range (~90% in the range of 350-2200 nm); Fast response time; High coloring efficiency and excellent cycle stability. In addition, the author also makes a detailed analysis and explanation of the mechanism of al3+ embedding / embedding and the reasons for the performance improvement, and makes a detailed comparison with li+ embedding / embedding. The achievement was published in the internationally renowned journal Energy & Environmental Science (impact factor: 30.067) with the title of "al3+ intercalation / de intercalation enabled dual band electronic smart windows with a high optical modulation, quick response and long cycle life", and the first author was zhangshengliang.


Graphic Guide: (the following pictures are from the author)


Figure 1 Structure and morphology characterization of monoclinic WO3-x nanowires

图2. 电致变色性能，电化学性能以及Al3+ 嵌入/嵌出过程中的结构表征。

Figure 3 Response time, coloring efficiency, memory effect and cyclic stability characterization

图 4. 器件性能表征。

[literature link]

1.Zhang, S.; Cao, S.; Zhang, T.; Fisher, A.; Lee, J. Y. Al3+intercalation/de-intercalation-enabled dual-band electrochromic smart windows with a high optical modulation, quick response and long cycle life. Energy & Environmental Science2018, DOI: 10.1039/c8ee01718b.

2.Zhang, S.; Cao, S.; Zhang, T.; Yao, Q.; Fisher, A.; Lee, J. Y. Monoclinic oxygen-deficient tungsten oxide nanowires for dynamic and independent control of near-infrared and visible light transmittance. Materials Horizons2018, 5, 291-297.

This paper was contributed by the research group of Professor Lee Jim Yang and edited by Niu.