Dual-Band Modulation of Visible and Near-Infrared Light Transmittance in an All-Solution-Processed Hybrid Micro-Nano Composite Film.
Dual-Band Modulation of Visible and Near-Infrared Light Transmittance in an All-Solution-Processed Hybrid Micro-Nano Composite Film.
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DOI：
10.1021/acsami.7b11582
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发表时间：
2017-11
影响因子：
9.5
通讯作者：
Xiao Liang;Mei Chen;Shumeng Guo;Lanying Zhang;Fasheng Li;Huai Yang
中科院分区：
文献类型：
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作者：
Xiao Liang;Mei Chen;Shumeng Guo;Lanying Zhang;Fasheng Li;Huai Yang
具有可控可见光和近红外光透射率的智能窗可以显著提高建筑的能源效率和居住舒适度。然而，目前大多数智能窗技术都无法达到理想的太阳能控制目标。在本文中，我们提出了一种新型的全溶液处理的混合微纳米复合智能材料，其具有四种光学状态，分别通过电压和温度来调制可见光和近红外光的透射率。这种双波段光调制是通过构建相分离的聚合物框架来实现的，该框架包含具有负介电常数的微米级液晶畴和掺杂钨的二氧化钒（W-VO 2）纳米晶体（NC）。当W-VO 2含量为2.5wt%时，薄膜在正常条件下具有透明性，可见光透过率可通过外加电压可逆地主动调节在60.8%~ 1.3%之间。此外，近红外光的透射率可以通过温度在59.4%和41.2%之间可逆地和被动地调制。此外，该薄膜还具有易于全溶液加工，快速电光（E-O）响应时间，高机械强度和长期稳定性。该薄膜的制备为下一代智能窗技术提供了新的机会，所提出的策略有助于工程化新型无机-有机杂化功能物质。
Smart windows with controllable visible and near-infrared light transmittance can significantly improve the building's energy efficiency and inhabitant comfort. However, most of the current smart window technology cannot achieve the target of ideal solar control. Herein, we present a novel all-solution-processed hybrid micronano composite smart material that have four optical states to separately modulate the visible and NIR light transmittance through voltage and temperature, respectively. This dual-band optical modulation was achieved by constructing a phase-separated polymer framework, which contains the microsized liquid crystals domains with a negative dielectric constant and tungsten-doped vanadium dioxide (W-VO2) nanocrystals (NCs). The film with 2.5 wt % W-VO2 NCs exhibits transparency at normal condition, and the passage of visible light can be reversibly and actively regulated between 60.8% and 1.3% by external applied voltage. Also, the transmittance of NIR light can be reversibly and passively modulated between 59.4% and 41.2% by temperature. Besides, the film also features easy all-solution processability, fast electro-optical (E-O) response time, high mechanical strength, and long-term stability. The as-prepared film provides new opportunities for next-generation smart window technology, and the proposed strategy is conductive to engineering novel hybrid inorganic-organic functional matters.