共查询到18条相似文献,搜索用时 93 毫秒
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混合氧化物电致变色器件 总被引:1,自引:0,他引:1
本文考察了WO3:TiO2混合氧化物电致变色的机理及WO3:TiO2厚度不同的器件的电致变色特性。结果表明:WO3:TiO2混合氧化物电致变色的过程符合电化学氧化还原反应,在电场作用下,着色前后离子价态发生可逆变化,着色后膜层处于混合价态离子共存状态。适当的TiO2掺杂量可以改善WO3:TiO2电致变色器件的变色特性、响应时间和器件寿命。 相似文献
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本文主要介绍了一种透射式电致变色器件的结构和其基本工作原理,并对不同尺寸器件的响应特性、光学特性、存贮特性及循环寿命进行了测量和分析。 相似文献
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透光率可调节的电致变色(EC)器件在光电子领域有着巨大的应用潜力。目前绝大多数电致变色器件都是基于氧化铟锡(ITO)透明电极和无机氧化钨(WO3)电致变色材料,机械柔性较差。本文采用多元醇法合成的银纳米线(AgNWs),有机电致变色材料(P3HT)和(PEDOT∶PSS)替代ITO与WO3制备柔性EC器件,并利用高透光率的ZnO涂层增强AgNWs与柔性基底的粘附性,以及改善AgNWs之间的节点接触从而优化AgNWs网格的相互连接,使得AgNWs柔性透明电极的表面电阻由69.9 Ω/□减小为45.8 Ω/□。另外通过在PVA水溶液中掺入LiBF4进行冷冻,得到离子导电率为1.53×10-2 S/cm的凝胶电解质,利用该高导电率的凝胶电解质充当对电极层简化EC器件,使得EC器件整体具有更高的透光率,制备出最大光调制范围为37.8%的PEDOT∶PSS EC器件和最大光调制范围为17.7%的P3HT EC器件。最后利用中国传统毛笔书写和大面积丝网印刷的方式制备个性化图案的PEDOT∶PSS EC器件,具有很好的显示效果。 相似文献
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采用垂直靶向脉冲激光沉积(VTPLD)法,在室温及 Ar气环境下于玻璃基底 上沉积Ag纳米薄膜。在Ag纳米薄膜上用提拉法获得一层聚苯胺(PANI)电致变 色薄膜。采用X射线衍射(XRD)、扫描电镜(SEM)和数字万用表考察激光功率对沉 积的Ag纳米薄膜的晶型结构、表面形貌和电导率的影响。采用循环伏安法、紫外 可见漫反射光谱法对不同激光功率下沉积的Ag纳米薄膜上PANI薄膜的电致变色 性能、结构变化进行分析。XRD和SEM结果显示,在玻璃基底上成功地获得粒径 为30~50nm的Ag纳米薄膜且其电阻值为1~5 Ω。在实验的最优条件 下,激光功率为17W时获得的Ag纳米薄膜致密均匀、结晶好和电阻值 较小;在优化的玻璃基底/Ag纳米薄膜上附着的PANI薄膜,电致变色电压最低、红移范围明 显。 相似文献
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Sven Macher Marco Schott Mauro Sassi Irene Facchinetti Riccardo Ruffo Giorgio Patriarca Luca Beverina Uwe Posset Guinevere A. Giffin Peer Lbmann 《Advanced functional materials》2020,30(6)
Conjugated electrochromic (EC) polymers for flexible EC devices (ECDs) generally lack a fully colorless bleached state. A strategy to overcome this drawback is the implementation of a new sidechain‐modified poly(3,4‐ethylene dioxythiophene) derivative that can be deposited in thin‐film form in a customized high‐throughput and large‐area roll‐to‐roll polymerization process. The sidechain modification provides enhanced EC properties in terms of visible light transmittance change, Δτv = 59% (ΔL* = 54.1), contrast ratio (CR = 15.8), coloration efficiency (η = 530 cm² C?1), and color neutrality (L* = 83.8, a* = ?4.3, b* = ?4.1) in the bleached state. The intense blue‐colored polymer thin films exhibit high cycle stability (10 000 cycles) and fast response times. The design, synthesis, and polymerization of the modified 3,4‐ethylene dioxythiophene derivative are discussed along with a detailed optical, electrochemical, and spectroelectrochemical characterization of the resulting EC thin films. Finally, a flexible see‐through ECD with a visible light transmittance change of Δτv = 47% (ΔL* = 51.9) and a neutral‐colored bleached state is developed. 相似文献
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J. P. Randin 《Journal of Electronic Materials》1978,7(1):47-63
Chemical and electrochemical stability of thermally evaporated amorphous films of WO3 on conductive glass substrates have been studied in various electrolytes in order to determine the intrinsic lifetime or WO3-based dis-play devices. The thickness loss of the WO3 films measured under storage conditions in the glycerin-H2SO4 (10 : 1) mixture was a linear function of time for devices held at 50? C with a dissolution rate of 20 –25 å/day. Under cycling at room temperature an average dissolution rate of about 18 å/day was observed during the first 30 days at 0.5 Hz and 40 % con-trast [defined as 100 (Bcolored - Bbleached / Bbleached) where B = brightness]. After that time the dissolution rate increased and the WO3 film began to crumble. The dissolution rate of WO3 has also been meas-ured in various non-aqueous solvents. The electrochemical response of WO3 in the various electrolytes has been investigated. 相似文献
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In recent years, flexible electronic devices have become a hot topic of scientific research. These flexible devices are the basis of flexible circuits, flexible batteries, flexible displays and electronic skins. Graphene-based materials are very promising for flexible electronic devices, due to their high mobility, high elasticity, a tunable band gap, quantum electronic transport and high mechanical strength. In this article, we review the recent progress of the fabrication process and the applications of graphene-based electronic devices, including thermal acoustic devices, thermal rectifiers, graphene-based nanogenerators, pressure sensors and graphene-based light-emitting diodes. In summary, although there are still a lot of challenges needing to be solved, graphene-based materials are very promising for various flexible device applications in the future. 相似文献
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以苯胺为单体,过硫酸铵为氧化剂,采用化学氧化聚合法分别在十二烷基苯磺酸(DBSA)和盐酸中合成了聚苯胺(PAn),并用傅里叶红外光谱和TGA-DTA技术对聚苯胺掺杂前后的结构变化和热稳定性进行了分析。研究了不同质子酸掺杂对聚苯胺气敏性能的影响。结果表明:十二烷基苯磺酸掺杂的聚苯胺,比普通盐酸掺杂的聚苯胺对目标气体具有更好的灵敏性。当r(S:N)为0.4~0.5时,在室温下其对1000×10-6NH3的灵敏度达到了10.43,响应时间为30s,恢复时间为3min。且与盐酸相比,十二烷基苯磺酸掺杂的聚苯胺具有更好的环境稳定性。 相似文献