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排序方式: 共有271条查询结果,搜索用时 15 毫秒
1.
Shengliang Zhang Sheng Cao Tianran Zhang Jim Yang Lee 《Advanced materials (Deerfield Beach, Fla.)》2020,32(43):2004686
Dual-band electrochromic smart windows capable of the spectrally selective modulation of visible (VIS) light and near-infrared (NIR) can regulate solar light and solar heat transmittance to reduce the building energy consumption. The development of these windows is however limited by the number of available dual-band electrochromic materials. Here, plasmonic oxygen-deficient TiO2-x nanocrystals (NCs) are discovered to be an effective single-component dual-band electrochromic material, and that oxygen-vacancy creation is more effective than aliovalent substitutional doping to introduce dual-band properties to TiO2 NCs. Oxygen vacancies not only confer good near-infrared (NIR)-selective modulation, but also improve the Li+ diffusion in the TiO2-x host, circumventing the disadvantage of aliovalent substitutional doping with ion diffusion. Consequently optimized TiO2-x NC films are able to modulate the NIR and visible light transmittance independently and effectively in three distinct modes with high optical modulation (95.5% at 633 nm and 90.5% at 1200 nm), fast switching speed, high bistability, and long cycle life. An impressive dual-band electrochromic performance is also demonstrated in prototype devices. The use of TiO2-x NCs enables the assembled windows to recycle a large fraction of energy consumed in the coloration process (“energy recycling”) to reduce the energy consumption in a round-trip electrochromic operation. 相似文献
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将电致变色玻璃实物安装于上海闵行一实验台进行测试。这个实验台包括2个几乎相同的办公建筑会议室,南侧是玻璃窗。其中一个会议室安装电致变色玻璃,可见光透过率为0.01~0.59,另一个会议室安装Low-e玻璃。2个房间均安装了内遮阳帘。研究中分析了电致变色玻璃对室内光环境和热环境的控制效果,同时,与安装Low-e玻璃和内遮阳的会议室的光、热效果进行对比。结果表明,非空调工况时,电致变色玻璃能够提供更均匀、稳定和舒适的室内热环境;同时,电致变色玻璃能够控制室内照度在一定范围内,特别适用于办公建筑室内光环境的舒适性。 相似文献
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Kim Bini Desta Gedefaw Caroline Pan Jonas M. Bjuggren Anirudh Sharma Ergang Wang Mats R. Andersson 《应用聚合物科学杂志》2019,136(27):47729
An easily accessible anthraquinone-benzodithiophene-based high bandgap polymer (PTAq) was synthesized by Stille coupling reactions in remarkably high yield (96.5%). The highest occupied molecular orbital energy level of the polymer was estimated from the onset of oxidation in a cyclic voltammetry study to be −5.7 eV. PTAq showed an orange-to-green color switching with the application of a 1.0-V external potential to the polymer film, which was visible to the naked eye. The optical behavior change was also monitored using ultraviolet–visible absorption spectroscopy and revealed a respectable 75% transmittance change when the polymer film was subjected to a 1.0-V external potential. The high color contrast observed makes PTAq one of the most promising materials for electrochromic device applications. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47729. 相似文献
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In this study, the effect of pendant pyrene on the optical and electronic properties of poly(2,5‐dithienylpyrrole)s was studied. For this purpose a new pyrene coupled 2,5‐dithienylpyrrole derivative (SNS‐pyrene) was synthesized through click reaction. SNS‐pyrene was electrochemically polymerized and its electrochemical and optical properties were investigated by electrochemical and optical techniques. The polymer had a band gap of 3.36 eV and displayed light green to blue color variation upon oxidation in less than 2.48 s. Additionally, electrochemical copolymerization of SNS‐pyrene with 3,4‐ethylenedioxythiophene was achieved whilst a detailed investigation was performed on the effect of electrochemical polymerization conditions on the optoelectronic properties of the copolymers. Studies revealed that the copolymers exhibit multichromic reversible redox behavior with lower band gaps and shorter switching times than their parent polymer, P(SNS‐pyrene) © 2014 Society of Chemical Industry. 相似文献
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本文采用磁控溅射方法,通过金属钼靶材在Ar+O2气氛中反应溅射制备了氧化钼薄膜.在制备样品过程中改变反应气氛O2的流量,保持其它参数不变,得到不同的氧化钼薄膜.采用X射线衍射(XRD)和扫描电子显微镜(SEM)方法对MoO3薄膜样品结构进行表征.XRD测试结果表明MoO3薄膜样品均为非晶结构.MoO3薄膜样品的光学性能和电致变色性能采用分光光度计进行测试研究.研究结果表明,当反应气氛O2/Ar流量比例为1:5时,所制备的样品具有较高的可见光透射率,可见光平均透射率为90%,并且电致变色性能较好,调色范围达到了66.94%. 相似文献
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Feng Lin Dennis Nordlund Tsu‐Chien Weng Rob G. Moore Dane T. Gillaspie Kim M. Jones Anne C. Dillon Ryan M. Richards Chaiwat Engtrakul 《Advanced Materials Interfaces》2015,2(6)
Interface engineering has attracted great interest and is essential for the fabrication of thin‐film devices, such as smart windows. In this study, a solid‐state conversion reaction for the development of an interlayer enriched with lithium peroxide (Li2O2) is presented for an electrochromic device. We demonstrate that efficient lithium insertion and electron transport can be achieved by the inclusion of a Li2O2‐rich interlayer between an active electrochromic material and Li ion solid‐state electrolyte layer. The presence of a Li2O2‐rich interlayer enhances electrochromic efficiency, kinetics, optical contrast, and bleached‐state transparency in a nickel oxide‐based electrochromic thin film. This work opens up new opportunities to enhance the functionalities of thin‐film devices by solid‐state conversion reactions. 相似文献
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采用恒电位法在FTO玻璃上沉积Co与Ni摩尔比为0.16:1的薄膜,用X射线衍射仪、扫描电镜和能谱仪分析了膜的成分、结构和形貌,用紫外-可见分光光度计表征了膜的透光性能,用循环伏安法表征了膜的电化学稳定性和可逆性,用双电位阶跃法表征了膜的开关响应时间,研究了钴掺杂对氧化镍薄膜电致变色性能的影响。结果表明,钴掺杂使NiO薄膜颗粒更加细小和均匀,提高了薄膜在可见光波段着色态与消色态之间的透光率差值,降低了电致变色反应的工作电压,有利于薄膜在电致变色过程的可逆性,缩短了着色响应时间。 相似文献