喷涂法制备高效率三元体系聚合物太阳能电池

采用喷涂技术制备了能量转化效率为9.06%的三元体系聚合物太阳能电池,该太阳能电池在卷对卷印刷和规模化生产中具有极大的应用潜力。     

喷涂法制备高效率三元体系聚合物太阳能电池

采用喷涂技术制备了能量转化效率为9.06%的三元体系聚合物太阳能电池,该太阳能电池在卷对卷印刷和规模化生产中具有极大的应用潜力。     

塑料太阳能电池研究进展

塑料太阳能电池是目前国际上比较活跃的研究领域,它具有制备工艺简单、可制备在柔性衬底上、材料的化学结构可调等优点.重点介绍以共轭聚合物-富勒烯衍生物混合物为活性层的体异质结结构塑料太阳能电池研究进展.从活性层薄膜的微观形态结构调控、电极接触界面、光场在电池各层中的空间分布以及叠层结构等几个方面综述了影响塑料太阳能电池效率的因素和提高效率的方法.最后简要介绍了塑料太阳能电池所面临的问题和挑战.     

有机高分子/无机半导体杂化太阳能电池的发展现状与展望

有机高分子/无机半导体杂化太阳能电池是一类以共轭聚合物和无机半导体材料的复合材料为主要原料制备的太阳能电池。本文详细论述了杂化太阳能电池的工作原理,并根据其工作原理分析了影响杂化太阳能电池效率的影响因素,包括给体材料的选择、异质结形态、光敏层厚度、无机半导体的选择与表面改性及电池的退火处理等,并从各个影响因素的角度对杂化太阳能电池的发展进行了讨论,最后从共轭聚合物的角度对杂化太阳能电池的发展做出了展望,指出想要进一步提高杂化太阳能电池的效率,未来应该在对已知共轭聚合物进行改性或合成新的共轭聚合物上投入更多的精力.     

富勒烯类界面修饰材料在聚合物太阳能电池中的应用

聚合物太阳能电池具有质量轻、成本低、可大面积柔性制备等优点,近年来成为国内外研究的热点.界面修饰是实现器件效率最大化的有效途径.与无机、高分子类界面修饰材料相比,富勒烯类界面修饰材料因富勒烯本身良好的电子亲和性及与受体分子结构相似而表现出优异的兼容性,在提高聚合物太阳能电池性能方面表现尤为突出.本文介绍了聚合物太阳能电池的结构与光伏参数,综述了富勒烯衍生物作为界面修饰材料,在聚合物太阳能电池中的研究进展,并对富勒烯类界面修饰材料的进一步发展进行了探讨.     

引入液晶小分子实现高效厚膜三元有机太阳能电池

<正>有机聚合物太阳能电池因其具有全固态、光伏材料性质可调范围宽、可实现半透明、可制成柔性器件以及可采用卷对卷印刷工艺大面积、低成本制备等突出优点而引起了广泛关注并得到了快速发展~(1,2)。其中三元有机太阳电池作为一种有效提高电池器件效率的办法也成为有机聚合物太阳能电池研究中的一个热点~3。一般情况下,在三元有机太阳能电池中第三     

聚合物太阳能电池光伏材料的研究进展

聚合物太阳能电池由于成本低廉、轻薄灵活、光伏材料分子结构的可设计性等优点成为近年来太阳能电池研究与开发的热点.光电转化效率较低一直是制约此类电池商业化的关键问题,而影响效率的因素包括电池结构、光伏材料的选择、以及电池的组装技术等.本文简要介绍了聚合物太阳能电池的工作原理,对电池光敏层结构的研究进展以及给、受体材料的种类...     

聚合物太阳能电池材料的研究进展

随着能源短缺和环境污染两大问题日益加重,人们对太阳能开发与利用更加深入。在众多太阳能的利用方式中,太阳能电池被认为是最有前途的。然而无机太阳能电池因其本身缺陷而受到限制。聚合物太阳能电池由于其成本低、质量轻、合成与修饰容易等优点成为太阳能电池研究的热点。近年来,该类太阳能电池的光电转换效率已经超过8%。本文简要介绍了聚合物太阳能电池的基本原理,并从开路电压、短路电流和填充因子等方面着重分析了其材料的设计原则,最后对其未来发展前景作出了展望。     

喷墨打印聚合物薄膜均匀性调控研究进展

聚合物发光显示材料具有发光颜色在全可见光区可调、可溶液简单加工及适用于柔性大面积基底的特点,成为目前研究的热点。 在聚合物发光薄膜图案化技术中,喷墨打印因为具有加工过程简单高效、适用于溶液方式加工、柔性的加工过程等特点而被认为是最具有应用潜力的技术。 高质量聚合物薄膜的制备是高精度发光显示器件制作的关键,但喷墨打印液滴在干燥过程中通常伴随着“咖啡环”现象,造成薄膜不均匀沉积。 因此,消除“咖啡环”现象,实现聚合物薄膜的均匀沉积,是喷墨打印高性能器件的重要研究方向。 本文主要论述了“咖啡环”效应的产生机理,如何抑制喷墨打印聚合物薄膜加工过程中的“咖啡环”效应,最终实现聚合物薄膜均匀性调控。     

高效率窄带隙聚合物太阳能电池材料

太阳能电池能够将太阳能直接转化为电能,是利用太阳能资源的一种非常有效的手段。聚合物太阳能电池因成本低、重量轻、制备方便和可制成柔性器件的优点,已经成为该领域的研究热点之一。基于窄带隙共轭聚合物给体/富勒烯受体复合材料体系制得的太阳能电池的最高转换效率已经达到8.3%,而寻找性能更优异的聚合物给体材料是进一步提高光伏性能的关键因素。本文综述了近几年关于高效率窄带隙聚合物太阳能电池给体材料的研究进展,着重介绍了苯并噻二唑类共聚物、稠环噻吩类共聚物和吡嗪类共聚物等窄带隙聚合物给体材料体系及相应光伏器件的性能,分析了各种材料的优点和不足,并对今后这一领域的发展做了展望。     

喷墨打印图案化高分子薄膜及其在有机电子器件加工中的应用

喷墨打印技术由于在图案化加工方面的高效、低成本、非接触形式及柔性的加工过程等特点而被应用于有机电子器件的加工中.通过打印功能性高分子溶液,喷墨打印实现了功能高分子薄膜的沉积和图案化,并实现了有机发光二极管、有机薄膜晶体管及其集成器件的加工.对喷墨打印在有机电子器件加工中取得的成果进行了总结,同时综述了高分子溶液喷墨打印过程中存在的基本科学问题和研究现状.     

Inkjet printed (bio)chemical sensing devices

Inkjet printing has evolved from an office printing application to become an important tool in industrial mass fabrication. In parallel, this technology is increasingly used in research laboratories around the world for the fabrication of entire (bio)chemical sensing devices or single functional elements of such devices. Regularly stated characteristics of inkjet printing making it attractive to replace an alternative material deposition method are low cost, simplicity, high resolution, speed, reproducibility, flexibility, non-contact, and low amount of waste generated. With this review, we give an overview over areas of (bio)chemical sensing device development profiting from inkjet printing applications. A variety of printable functional sensor elements are introduced by examples, and the advantages and challenges of the inkjet method are pointed out. It is demonstrated that inkjet printing is already a routine tool for the fabrication of some (bio)chemical sensing devices, but also that novel applications are being continuously developed. Finally, some inherent limitations of the method and challenges for the further exploitation of this technology are pointed out.     

Importance of domain purity in semi‐conducting polymer/insulating polymer blends transistors

Printed electronics is a rapidly developing field of research which covers any electronic devices or circuits that can be processed using direct printing techniques. Among those printing techniques, inkjet printing is a technique of increasing interest for organic field‐effect transistors (FETs) due to its fully data driven and direct patterning. In this work, the morphology of semi‐conducting polymer/insulating polymer blends from inkjet printing and their FET properties have been investigated. We attempted to optimize the morphology of the blends by the addition of a co‐solvent to the blend solution prior to film deposition. By varying the boiling temperature of the co‐solvent, blend films are fabricated with varying domain purity and different degree of semi‐conducting polymer ordering. The morphologies of all the as‐cast samples from inkjet printing and subsequently thermally annealed samples are characterized by grazing incidence wide angle x‐ray scattering and small angle neutron scattering. The results indicate that the sample where a low boiling temperature co‐solvent is used exhibits a lower degree of semi‐conducting polymer ordering and less pure domains, resulting in a decrease of hole mobility. The morphologies that are formed when high boiling temperature co‐solvent is used, however, give a higher degree of semi‐conducting polymer ordering along with higher domain purity, significantly improving hole mobility up to 1.44 cm² V^?1 s^?1 at V_DS = 40 V. More importantly, with thermal annealing, all the samples exhibit similar semi‐conducting polymer ordering and domain sizes while the domain purity significantly varies. This work is a unique example that demonstrates the importance of domain purity in the optimization of morphology and FET performance, which is previous unavailable. It also provides a novel process that can efficiently control the morphology of semi‐conducting polymer/insulating polymer mixtures during deposition to maximize FET performance from inkjet printing. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2016 , 54, 1760–1766     

Controllable Photoelectric Properties of Carbon Dots and Their Application in Organic Solar Cells

Organic solar cells are a current research hotspot in the energy field because of their advantages of lightness,translucency,roll to roll printing and building integration.With the rapid development of small molecule acceptor materials with high-performance,the efficiency of organic solar cells has been greatly improved.Further improving the device efficiency and stability and reducing the cost of active layer materials will contribute to the industrial development of organic solar cells.As a novel type of carbon nanomaterials,carbon dots gradually show great application potential in the field of organic solar cells due to their advantages of low preparation cost,non-toxicity and excellent photoelectric performance.Firstly,the synthesis and classification of carbon dots are briefly introduced.Secondly,the photoelectric properties of carbon dots and their adjusting,including adjustable surface energy level structure,good film-forming performance and up/down conversion characteristics are summarized.Thirdly,based on these intrinsic properties,the feasibility and advantages of carbon dots used in organic solar cells are discussed.Fourthly,the application progress of carbon dots in the active layer,hole transport layer,electron transport layer,interface modification layer and down-conversion materials of organic solar cells is also reviewed.Finally,the application progress of carbon dots in organic solar cells is prospected.Several further research directions,including in-depth exploration of the controllable preparation of carbon dots and their application in the fields of interface layer and up/down conversion for improving efficiency and stability of device are pointed out.     

纳米粒子的制备及其在打印印刷领域的应用

本文简要介绍了几类纳米粒子的制备及其在打印印刷领域的应用.包括无机纳米粒子复合材料用于绿色打印制版、聚合物乳胶纳米粒子用于喷墨打印制备光子晶体、金属纳米粒子用于印刷电路以及纳米材料用于3D打印,并展望了其发展前景.     

数字喷墨印刷关键技术及其实现

经过20多年的完善与发展，喷墨技术已经成为大幅面广告印刷行业的主要印刷技术。随着图书按需印刷需求的快速扩张以及国家环保政策的迅速落地，喷墨印刷技术作为一项高效环保的数字化印刷技术，得到越来越高的关注，业内普遍认为喷墨印刷技术将是数字化印刷的必然发展趋势。然而与已经成熟的多Pass喷墨印刷设备不同，单Pass喷墨印刷设备在数据带宽、数据在线重构、高精度同步控制、喷嘴在线补偿等方面有着极高的技术要求。本文首先简要介绍了喷墨技术，然后针对单Pass喷墨印刷设备需要解决的技术问题提出了相应的解决方案。依据本文技术设计的单Pass书刊喷墨印刷机已经投放市场，并且获得了用户的普遍认可。     

基于喷墨打印石墨烯透明导电薄膜研究进展

随着柔性电子产品的应用日渐广泛,采用喷墨打印技术制备大面积柔性电子产品的技术引起了人们的关注。石墨烯由于具有优异的光学和机械性能,成为制备透明导电薄膜的理想材料。石墨烯可以通过物理或化学方法制备得到。而喷墨打印技术因具有成本低廉、操作简单等优点成为制备大面积柔性电子产品的方法之一。本文首先对石墨烯的性质和制备方法进行了简述,然后分别阐述了喷墨打印墨水条件和喷墨打印图案化控制,最后总结了透明导电薄膜的应用进展以及发展趋势。     

Sonochemical Degradation of Gelatin Methacryloyl to Control Viscoelasticity for Inkjet Bioprinting

Inkjet printing enables the mimicry of the microenvironment of natural complex tissues by patterning cells and hydrogels at a high resolution. However, the polymer content of an inkjet-printable bioink is limited as it leads to strong viscoelasticity in the inkjet nozzle. Here it is demonstrated that sonochemical treatment controls the viscoelasticity of a gelatin methacryloyl (GelMA) based bioink by shortening the length of polymer chains without causing chemical destruction of the methacryloyl groups. The rheological properties of treated GelMA inks are evaluated by a piezo-axial vibrator over a wide range of frequencies between 10 and 10 000 Hz. This approach enables to effectively increase the maximum printable polymer concentration from 3% to 10%. Then it is studied how the sonochemical treatment effectively controls the microstructure and mechanical properties of GelMA hydrogel constructs after crosslinking while maintaining its fluid properties within the printable range. The control of mechanical properties of GelMA hydrogels can lead fibroblasts more spreading on the hydrogels. A 3D cell-laden multilayered hydrogel constructs containing layers with different physical properties is fabrictated by using high-resolution inkjet printing. The sonochemical treatment delivers a new path to inkjet bioprinting to build microarchitectures with various physical properties by expanding the range of applicable bioinks.