化学法制备石墨烯基透明导电薄膜的研究进展

石墨烯作为一种新型的二维纳米材料,具有优异的透光率和导电性。与传统的铟锡氧化物(ITO)相比,石墨烯具有更高的导电性、较好的柔韧性和丰富的资源,因此石墨烯在透明导电薄膜领域有着较好的应用前景。主要对国内外近3年来化学法制备石墨烯基透明导电薄膜的最新研究成果进行综述。并以成膜方法的不同为区分,重点介绍了真空抽滤法、旋涂法、自组装、Langmuir-Blodgett(LB)法、喷涂法制备石墨烯基透明导电薄膜的最新研究成果。同时,对薄膜的硝酸处理、掺杂进行了介绍。最后,就目前化学法制备石墨烯基透明导电薄膜所面临的问题进行了讨论,并对石墨烯透明导电薄膜的未来发展进行了展望。     

还原氧化石墨烯/碳纳米管透明导电薄膜的制备及性能研究

使用天然植物多酚——单宁酸(TA)作为氧化石墨烯(GO)的还原剂,通过"一步法"实现了对GO的绿色还原和功能化.随后,将TA还原氧化石墨烯(RGO)和碳纳米管(SWCNT)结合起来,共同构筑具有三维结构的石墨烯/单壁碳纳米管(RGO/SWCNT)透明导电薄膜(TCFs).该薄膜有着良好的导电性(透光率为75.1％时,面...     

石墨烯透明导电薄膜的研究现状及应用前景

简要概述了石墨烯透明导电薄膜的结构与性质、几种常见的石墨烯透明导电薄膜的制备方法以及潜在应用,对石墨烯透明导电薄膜的研究现状进行了评述。最后,就目前石墨烯透明导电薄膜研究中所面临的问题进行了讨论,并展望了其应用前景与发展趋势。     

石墨烯透明导电薄膜可控制备及实用性研究

新型二维材料石墨烯,因其优异特性被认为是众多领域的理想新型功能材料,其产业化应用是当前及未来的重要研究课题之一。综述了针对性提高石墨烯导电薄膜透光率和导电性能的可控制备的最新研究进展,包括可控制备大尺寸、大面积石墨烯,以及通过掺杂或与其他材料形成复合材料等方法有效提高石墨烯薄膜的光电性能,并对石墨烯透明导电薄膜电极在触摸屏、显示屏等的实用化应用进行了探讨和展望。     

石墨烯透明导电薄膜技术的专利分析

以Innography专利数据库收录的全球石墨烯透明薄膜技术领域的专利文献为研究对象,通过对专利申请的年度变化、国家、专利权人、专利发明人和国际专利分类号等内容的分析,揭示石墨烯透明导电薄膜技术的发展现状与趋势,为我国石墨烯透明导电薄膜领域的技术创新和战略发展提供参考。     

石墨烯/纳米减反结构复合透明导电薄膜的研究

石墨烯具有较高的透过率及良好的电导率, 作为透明导电薄膜具有潜在的应用价值。首先在石英基底上引入SiO₂纳米球阵列结构作为光学减反射层, 使石英基底可见光区光学透过率从93.2%增加到99.0%。然后利用常压化学气相沉积方法, 通过基底表面铜颗粒远程催化碳源, 直接在减反层上可控制备具有石墨烯/纳米减反结构的新型复合透明导电薄膜。通过去除SiO₂纳米球阵列结构形成反相复制的石墨烯空心球阵列结构, 且生长时间10 min时, 对应半高宽约40 cm^-1, I_2D/I_G = 2.31, I_D/I_G = 0.77, 证明在SiO₂纳米球阵列减反结构上制备了低缺陷且连续的全包覆少层石墨烯薄膜。引入SiO₂纳米球阵列减反结构后, 其在可见光区光学550 nm波长处的透过率平均提高了5.5%, 方块电阻相对无减反射层基底平均降低了20.09%。本研究方法避免了复杂的转移工序, 减少了对石墨烯的损失与破坏, 同时实现了高透光性及高导电性的功能协同, 在光伏器件、平板显示等领域展示出更大的应用前景。     

透明导电氧化物薄膜研究进展

综述了透明导电氧化物(TCO)薄膜的应用和发展,重点阐述了TCO薄膜的透明导电机理以及制备工艺的最新研究进展,同时对其研究和应用前景进行了展望.     

掺杂ZnO透明导电薄膜研究进展

ZnO基透明导电薄膜是近年来研究的一个热点。总结了近年来掺杂ZnO薄膜,主要有Al掺杂、Ga掺杂、In掺杂和Zr掺杂的一些研究进展,并在此基础上对掺杂ZnO透明导电薄膜的发展进行了展望。     

ITO透明导电薄膜的研究进展

介绍了ITO薄膜的基本特性和透明导电原理,综述了ITO薄膜主要的制备技术及其研究进展,并指出了不同制备方法的优缺点.还对ITO薄膜晶格常数畸变、载流子浓度上限和最佳掺杂量、红外反射率、光吸收边的移动等基础理论研究进展进行了归纳.今后,还需要在低温或室温ITO薄膜的制备、ITO薄膜的导电机理、纳米尺度ITO材料的特性等方面加强研究.     

柔性透明导电薄膜及其制备技术

在柔性衬底上制作的器件具有重量轻、柔软等优点,所以柔性透明导电薄膜成为当前的研究热点.柔性衬底存在不耐高温的缺点,从而限制了柔性透明导电薄膜的性能.总结了近年来对柔性衬底材料处理的方法,并介绍了柔性透明导电ITO薄膜和ZAO薄膜,分析了它们的研究现状,同时讨论了柔性薄膜的制备方法,最后对柔性透明TCO领域未来的研究和应用工作进行了展望.     

Transparent and Flexible Cellulose Nanocrystal/Reduced Graphene Oxide Film for Proximity Sensing

The rapid development of touch screens as well as photoelectric sensors has stimulated the fabrication of reliable, convenient, and human‐friendly devices. Other than sensors that detect physical touch or are based on pressure sensing, proximity sensors offer controlled sensibility without physical contact. In this work we present a transparent and eco‐friendly sensor made through layer‐by‐layer spraying of modified graphene oxide filled cellulose nanocrystals on lithographic patterns of interdigitated electrodes on polymer substrates, which help to realize the precise location of approaching objects. Stable and reproducible signals generated by keeping the finger in close proximity to the sensor can be controlled by humidity, temperature, and the distance and number of sprayed layers. The chemical modification and reduction of the graphene oxide/cellulose crystal composite and its excellent nanostructure enable the development of proximity sensors with faster response and higher sensitivity, the integration of which resolves nearly all of the technological issues imposed on optoelectronic sensing devices.     

Fabrication of Flexible Transparent Conductive Films with Silver Nanowire by Vacuum Filtration and PET Mold Transfer

The flexible transparent conductive films(FTCFs) of silver nanowire-polyethylene terephthalate(AgNWPET) were prepared by a facile method including vacuum filtration and mold transferring.The effect of silver nanowire weight density on the optical and electrical properties of films,as well as the electrical percolation was investigated.The obtained typical AgNW-PET film exhibited high figure of merit of31.3×10~(-3)Ω~(-1) with low sheet resistance of 4.95 Ω sq~(-1) and high transparency at 550 nm of 83.0%(excluding PET substrate).The resulting FTCFs based on PET substrate with high transmittance and low sheet resistance have a great potential in the application of high-performance flexible electronics and photovoltaic devices.     

Thermal Response of Transparent Silver Nanowire/PEDOT:PSS Film Heaters

Thermal response behavior of transparent silver nanowire/PEDOT:PSS film heaters are intensively studied for manipulating heating temperature, response time, and power consumption. Influences of substrate heat capacity, heat transfer coefficient between air and heater, sheet resistance and dimension of Ag nanowire film, on the thermal response are investigated from thermodynamic analysis. Suggestion is given for practical applications that if other parameters are fixed, Ag nanowire coverage can be utilized as an effective parameter to adjust the thermal response. The heat transfer coefficient plays opposite roles on thermal response speed and achievable steady temperature. A value of ≈32 W m^?2 K^?1 is obtained from transient process analysis after correcting it by considering heater resistance variation during heating tests. Guidance of designing heaters with a given response time is provided by forming Ag nanowire film with a suitable sheet resistance on substrate of appropriate material and a certain thickness. Thermal response tests of designed Ag heaters are performed to show higher heating temperature, shorter response time, and lower power consumption (179 °C cm² W^?1) than ITO/FTO heaters, as well as homogeneous temperature distribution and stability for repeated use. Potential applications of the Ag heaters in window defogging, sensing and thermochromism are manifested.     

银纳米线透明导电薄膜的失效机理研究

银纳米线透明导电薄膜材料作为新兴的无铟电极材料, 以其优越的光电性能和力学柔韧性, 在显示器件、触控面板、太阳能电池、智能加热和电磁屏蔽等领域崭露头角, 吸引越来越多的来自科研界及产业界的关注。然而, 银纳米线透明导电薄膜在应用中面临着较为严重的稳定性问题, 主要表现为容易被痕量含硫气体腐蚀, 在300 ℃以上的温度下纳米线出现断裂和球形化等结构失稳现象, 在紫外光照条件下腐蚀及球形化加剧, 在加载电场条件下出现离子迁移并产生孔洞及断裂现象。本文详细介绍了以上各种失效现象, 分析了失效的微观机制, 介绍了解决各种失效现象的具体措施。银纳米线透明导电薄膜失效行为的研究, 有助于进一步推动该材料的实际应用进程。     

基于丝素蛋白与纳米银线的柔性透明导电膜及其光电应用

丝素蛋白具有优异的生物相容性,可用于生物医学、组织工程等领域.为了探索丝素蛋白在不同交叉领域的应用,本工作首先合成了高长径比的纳米银线,将其旋涂在玻璃基底上,然后流延、浇注再生丝素蛋白溶液,经过干燥后得到具有优异的方块电阻和良好的透光率的柔性导电膜.为了探索该柔性导电膜在光电领域的应用,以纳米银线-丝素蛋白膜代替传统的ITO-玻璃基底制备了简单的有机太阳能电池.结果发现,纳米银线形成了充分接触的网格,并且被丝素蛋白牢牢地包覆,膜的结构没有因为纳米银线的引入而被破坏.纳米银线-丝素蛋白膜在550 nm处的透光率随着纳米银线溶液旋涂次数的增加由最高的97％降低至81％.膜的方块电阻随着纳米银线溶液旋涂次数的增加由最高的33.6Ω/sq降低至6.0Ω/sq.有机太阳能电池的光电转换效率为4.78％,开路电压为0.67 V,短路电流为15.22 mA/cm2.     

Graphene Film in Flexible Electronics Devices as Transparent Electrode

正Graphene has excellent optical and electricproperties,which make it a good candidate fortransparent electrode Moreover,its flexibility isvery good for flexible electronics applications.HereI'd like to introduce the detailed technique of mak-ing flexible graphene touch sensor and displays,and further show its potential application in the flexi-ble devices.