喷墨打印技术制备聚合物太阳能电池的研究进展

聚合物太阳能电池具有成本低、质量轻、容易制备大尺寸器件等优势,是太阳能电池研究中最为活跃的领域之一。喷墨打印技术作为新的成膜技术,具有材料利用率高、快速、可柔性加工等优点,已被用于聚合物太阳能电池的制备,发展潜力巨大。综述了聚合物太阳能电池、喷墨打印技术和喷墨打印技术制备聚合物太阳能电池的研究进展,同时对聚合物太阳能电...     

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。     

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.     

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。     

导电聚合物在纤维状能源器件中的应用进展

Conductive polymers implemented in fibrous energy devices have drawn considerable attention because of their economic importance, good environmental stability, and electrical conductivity. Conductive polymers demonstrate interesting mechanical, electronic, and optical properties, controllable chemical and electrochemical behavior, and facile processability. This review elaborates on the latest research in conductive polymers in fibrous energy devices, such as fibrous supercapacitors, fibrous solar cells, and fibrous integrated energy devices. The performance requirements of these fibrous energy devices, with specific reference to related materials, fabrication techniques, fiber structure, and electronic transport as well as mechanical functionality, are also reviewed in this paper.     

聚合物薄膜电致发光器件

综述了聚合物薄膜电致发光器件的材料、结构、发光机理、研究现状和目前存在的主要问题，同时对发展方向也进行了简单介绍。     

导电聚合物基电致变色器件的研究进展

导电聚合物作为电致变色活性材料是目前最有应用前景的智能材料之一。本文概述了电致变色器件的基本结构和导电聚合物的电致变色机理,着重介绍了多种导电聚合物基电致变色器件的特点、组成及制备,并展望了未来电致变色器件的发展及应用趋势。     

新型共轭聚合物的设计合成及其在场效应晶体管的应用

近年来,有机场效应晶体管(OFETs)由于在柔性器件和可穿戴电子学中的潜在应用受到了学术界和工业界的普遍关注,尤其是以聚合物半导体材料构筑的晶体管性能得到了快速的发展.如何设计合成用于OFETs的高性能聚合物半导体材料,一直是我们的追求目标.然而,分子结构对迁移率的影响仍缺少系统的比较.本文综述了近年来国内外新型聚合物材料的最新进展.我们按照材料的种类以及载流子的传输类型进行了分类,对高性能聚合物材料的发展过程、材料的设计思路以及相应的FETs性能进行了系统地归纳总结.通过研究分子及分子聚集态结构与器件性能之间的关系,希望为以后设计合成新型的高性能的聚合物材料提供有益的借鉴和指导.     

有机、聚合物薄膜电致发光器件的研究进展

有机、聚合物薄膜电致发光器件是近年来国际上的一个研究热点。与无机材料相比, 有机材料具有更高的发光效率和更宽的发光颜色选择范围, 并且具有容易大面积成膜的优越性。本文介绍了有机、聚合物薄膜电致发光器件的结构和制备、发光机理以及有关材料的选择, 并对该研究领域的最新动态、器件的稳定性问题以及应用前景进行了讨论。     

喷墨打印制备LiMn2O4薄膜电极及其电化学性能

通过溶胶-凝胶法制备了尖晶石LiMn2O4.用分散剂Lormar D,经超声分散制得了含LiMn2O4粒子的打印"墨水",并使用计算机喷墨打印的方法制得LiMn2O4薄膜电极.薄膜电极的厚度约为1.8 μm.用XRD、TG-DTA、SEM、循环伏安、电化学阻抗谱和充放电等方法对材料和电极的性能进行了表征.结果表明,在较大电流100 μA·cm-2(2C)的充放电情况下,电极能保持好的稳定性,其首次放电容量为109 mAh·g-1,充放电54次后,其容量仍可保持97.4%,为105 mAh·g-1,这可归因于薄膜电极中尖晶石LiMn2O4的晶型完整,LiMn2O4粒子小以及稳定的超薄电极结构.     

The Synthesis and Optoelectronic Applications for Tellurophene-Based Small Molecules and Polymers

Tellurophene-based small molecules and polymers have received great attentions owing to their applications in thin-film transistors, solar cells, and sensors. This article reviews the current progress of the synthesis and applications of tellurophene-based small molecules and polymers. The physicochemical properties and optoelectronic applications of tellurophene-based materials are summarized and discussed. In the end, the challenges and outlook of tellurophene-based materials are presented.     

聚合物电存储材料及其双电极型存储器件

随着信息产业的高速发展,传统的存储技术已不能完全满足人们的需求。因此,对聚合物电存储材料与器件的研究应运而生。相对于传统的无机存储材料,基于聚合物的电存储材料与器件具有易加工、低成本、稳定性好、低功耗、可实现三维堆积以及高存储密度等优点,极有可能取代传统的无机半导体器件,显示出广阔的发展前景。本文介绍了聚合物电存储器件的一些基本原理及基本概念,并对存储器件几种主要的作用机制做了归纳; 根据器件的易失性与否,描述了闪存、一次写入多次读取及动态随机存储器件三类存储器件的存储特点,总结了聚合物电双稳材料及其在三类存储器件中应用的研究进展,探讨了这一研究领域需要解决的一些关键问题,最后展望了聚合物电存储材料与器件的研究和发展方向。     

有机/聚合物顶发射发光器件

有机/聚合物顶发射发光器件可以解决传统底发射发光器件的一系列不足。高性能顶发射发光器件的实现,首先必须优化器件结构,其次对电子注入材料和空穴注入材料提出更高的要求。本文从提高顶发射器件中电子注入和空穴注入方法入手,综述了国内外有机/聚合物顶发射电致发光器件的发展历史,研究现状,最新进展及以后的发展方向。     

含硼有机发光二极管材料与器件

硼元素因其独特的价层电子结构——价电子数少于价轨道数,而拥有一个空的p轨道,其三配位化合物既可以和邻近的π体系产生有效共轭,又可以容易地与路易斯碱发生络合,形成四配位化合物。将硼元素引入传统的光电功能分子当中,往往能给整个体系带来独特的光电性质,这已成为新型有机光电功能分子设计的重要思路。本文围绕硼元素的三配位化合物和四配位化合物,从分子设计理念、化合物光电性质、相关器件的结构与效率等方面对含硼有机光电功能分子及其器件的研究进展进行综述,并对其未来发展做出展望。     

水/醇溶聚合物界面材料在聚合物光电器件中的应用及性能研究

系统研究了系列不同共轭与非共轭水/醇溶聚合物作为界面修饰材料在聚合物发光二极管和聚合物太阳电池中的应用及结构性能关系. 研究了界面层厚度, 器件金属电极功函对材料界面修饰性能的影响. 在此基础上, 系统对比研究了共轭与非共轭水/醇溶聚合物界面材料在不同聚合物光电器件中界面修饰性能的差别. 内建电势测试与器件研究结果表明, 在聚合物发光二极管中, 共轭材料表现出明显优于非共轭材料的性能, 特别是在超高功函数的金属金电极器件中, 共轭的水/醇溶聚合物材料依然表现出很好的电子注入/传输性能; 在聚合物太阳电池中, 共轭材料的界面修饰性能也优于非共轭类界面修饰材料.     

Recent Advances in Isoindigo‐Inspired Organic Semiconductors

Over the past decade, isoindigo has become a widely used electron‐deficient subunit in donor‐acceptor organic semiconductors, and these isoindigo‐based materials have been widely used in both organic photovoltaic (OPV) devices and organic field effect transistors (OFETs). Shortly after the development of isoindigo‐based semiconductors, researchers began to modify the isoindigo structure in order to change the optoelectronic properties of the resulting materials. This led to the development of many new isoindigo‐inspired compounds; since 2012, the Kelly Research Group has synthesized a number of these isoindigo analogues and produced a variety of new donor‐acceptor semiconductors. In this Personal Account, recent progress in the field is reviewed. We describe how the field has evolved from relatively simple donor‐acceptor small molecules to structurally complex, highly planarized polymer systems. The relevance of these materials in OPV and OFET applications is highlighted, with particular emphasis on structure‐property relationships.     

Thickness Uniformity Adjustment of Inkjet Printed Light-emitting Polymer Films by Solvent Mixture

In this paper, thickness uniformity of poly（9,9-di-n-octylfluorene） films patterned by inkjet printing was im- proved by the use of solvent mixtures （a solvent with higher volatility, higher surface energy and lower viscosity, with another solvent with lower volatility, lower surface energy and higher viscosity）. The average thickness of inkjet printed poly（9,9-di-n-octylfluorene） films was increased from ca. 30 nm to ca. 100 nm when solvent mixtures were used instead of pure chlorobenzene. More flat PFO films were formed instead of the original films with con- cave-lens like cross-section formed by coffee ring effect. This improvement was explained by combination of in- tense Marangoni flow at early drying process and weak complementary flow at the later drying process formed in the solvent mixture. Patterned poly（9,9-di-n-octylfluorene） films were used for fabrication of electroluminescence devices with improved electronic property. Array of pixels with about 80% effective light-emitting area was ob- tained.     

Increasing the Open‐Circuit Voltage in High‐Performance Organic Photovoltaic Devices through Conformational Twisting of an Indacenodithiophene‐Based Conjugated Polymer

A fused ladder indacenodithiophene (IDT)‐based donor–acceptor (D–A)‐type alternating conjugated polymer, PIDTHT‐BT, presenting n‐hexylthiophene conjugated side chains is prepared. By extending the degree of intramolecular repulsion through the conjugated side chain moieties, an energy level for the highest occupied molecular orbital (HOMO) of –5.46 eV – a value approximately 0.27 eV lower than that of its counterpart PIDTDT‐BT – is obtained, subsequently providing a fabricated solar cell with a high open‐circuit voltage of approximately 0.947 V. The hole mobility (determined using the space charge‐limited current model) in a blend film containing 20 wt% PIDTHT‐BT) and 80 wt% [6,6]‐phenyl‐C₇₁ butyric acid methyl ester (PC₇₁BM) is 2.2 × 10^–9 m² V^–1 s^–1, which is within the range of reasonable values for applications in organic photovoltaics. The power conversion efficiency is 4.5% under simulated solar illumination (AM 1.5G, 100 mW cm^–2).

     

Design and Synthesis of Conjugated Starburst Molecules for Optoelectronic Applications

In recent years, conjugated starburst molecules, which possess a core unit with radial arms linked to the central axle, have become the research topic owing to their well‐defined chemical structures, good solution processability, excellent reproducibility, and superior optoelectronic properties. The increasing interest in starburst systems is evidenced by progressively more frequent investigation on the use of these materials in optoelectronics. The ability to modify chemical structures through control over the core and arms on a molecular level can directly affect the electronic and electroluminescent characteristics of the resulting materials. In this review, we summarize and discuss main progress in our group concerning the rapidly developing field, in which strategies for the design and construction of starbursts are presented at length. Moreover, their application in organic light‐emitting diodes (OLEDs) and organic semiconductor lasers (OSLs) are demonstrated as well, exploring the influence of molecular structures on the optoelectronic properties. Challenges and outlooks are also given at last.