有机电致发光研究进展

本文对有机电致发光的研究进展进行了综述，内容包括：电致发光的机理、OLED的器件结构、特点、应用以及有机电致发光材料的研究状况，并对OLED的发展前景和方向作了评述。     

倍半硅氧烷基电致发光材料的研究进展

有机电致发光器件(OLED)作为一种新型显示器件,其结构简单、易于制造、成本更低、性能更好,未来在各领域将有很大的应用潜力。其中电致发光材料是OLED的核心材料,是OLED能否工业化生产的关键因素,但目前发光材料仍存在一些不足。多面体倍半硅氧烷(POSS)作为一种笼状无机材料,由于具有良好的耐热性、力学强度、稀释效应,经常与咔唑、芴等有机物杂化,从而有效地改善光电和物理性能,被用作OLED电致发光材料,已得到当前电致发光研发领域的极大关注。本文主要介绍了倍半硅氧烷基电致发光材料的研究进展。     

基于蒽衍生物的蓝色发光材料性能、模拟及OLED器件研究

有机电致发光器件也被称为OLED,在近几十年之内吸引了众多科研人员的目光。OLED元器件具有诸多优势,比如主动发光和超薄、低能耗、视角范围广等优势。在目前市场上已经开始对这种材料大规模的生产。逐渐商业化生产的OLED器件仍旧需要从电致发光材料的设计、器件结构的优化等几个方面来降低生产的成本。蒽衍生物有比较高的荧光量子和很好的稳定性,还有诸多优势,可以运用在有机电致发光器件的生产中。     

高效磷光OLED材料的设计、合成与性能

结合我国高效磷光OLED材料设计、合成工作的开展情况来看,有机电致发光器件二十年来得到了长远发展,并且在我国固态照明领域进入了实用化的发展阶段。通过介绍高效磷光OLED材料的发展现状,对高效磷光OLED材料的功能进行了探究,从化学角度以及物理载流子方面对高效磷光OLED材料的主体进行了分析与总结。     

深蓝色OLED材料均三嗪衍生物的合成与表征

深蓝色OLED材料作为有机电致发光器件,具有亮度高、效率高、响应速度快、驱动电压低、大面积光电显示等特点,广泛应用于高效照明、平板显示领域。以深蓝色OLED材料均三嗪衍生物的合成为研究对象,从合成准备、合成方法两个方面,简述了深蓝色OLED材料均三嗪衍生物的合成过程,并对其表征进行了进一步分析。     

高效氟代联蒽类深蓝光材料的合成及OLED性能分析

高效深蓝色发光材料与器件一直是发展高性能 WOLEDs 面临的主要挑战之一,制约了有机电致发光技术发展。因此设计了相关实验,对高效氟代联蒽类深蓝光材料的合成及OLED性能进行分析。     

含噁二唑类有机电致发光材料的研究进展

有机电致发光器件(OLED)具有视角宽、功耗低、响应速度快、发光亮度和发光效率高、能实现全色显示等优点,备受科学界和产业界的广泛重视。特别是自从1987年Tang首次报道了工作电压低、发光亮度高的OLED以来,其研究工作取得了更快速地发展。近十余年里,已经逐渐成为多学科交叉的具有高技术含量的前沿课题。含1,3,4-噁二唑环的-聚合物作为一种新型的具有电子传输功能的有机电致发光材料在近10年的研究中引起了人们的极大关注。由于1,3,4-噁二唑环是一个具有高电子亲和势和空穴阻挡作用的基团,因此含该基团的化合物是一类具有良好电子传输功能的有机电致发光材。     

3-(N-联苯基氨基)-9-苯基咔唑的合成与表征

以咔唑为初始原料,经NBS亲电取代反应、Ullmann反应和Buchwald-Hartwig偶联反应,合成了有机电致发光器件(OLED)空穴传输材料中间体标题化合物,利用NMR、IR、MS和元素分析等分析方法对产物进行了表征。     

苯并咪唑衍生物的合成及在OLED中的应用

近年来,有机电致发光二极管在固态照明以及平板显示中的应用愈发广泛,逐渐受到了人们的广泛关注。与传统显示技术而相比,OLED本身具有低功耗、广视角、可柔性显示等优势,进而被广泛应用到笔记本电脑、智能手机等领域。OLED身为一种有机薄膜器件,在应用过程中材料中的载流子传输层对于整个器件性能有着十分重要的作用。通过论述苯并咪唑衍生物的相关概述,探究了该物质在生物电子传输材料合成中的应用。     

紫外光／电子束（UV／EB）固化的应用现状与发展前景（十一）

(上接本刊第11期)6.6.2有机/聚合物发光二极管(OLED/PLED)有机/聚合物发光二极管(OLED/PLED)是一种由有机小分子薄膜或有机高分子薄膜构成的电致发光(Electroluminescence,简称EL)器件,也是一种新型的平面显示器。这种有机/聚合物发光二极管具有主动发光、亮度高、轻薄、高对比     

含有芘基团的电致发光材料的研究进展

综述了近几年芘的衍生物在有机电致发光中的研究情况,展示了一些新结构并做了分析,总结了含芘基团电致发光材料的优点和缺点,并指出了芘的衍生物在有机电致发光材料中的应用前景。     

Diimide nanoclusters play hole trapping and electron injection roles in organic light-emitting devices

We report thermally stable diimide nanoclusters that could potentially replace the conventional thick electron transport layer (ETL) in organic light-emitting devices (OLEDs). Bis-[1,10]phenanthrolin-5-yl-bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxylic diimide (Bphen-BCDI) was synthesized from the corresponding dianhydride and amine moieties, and its purified product exhibited a high glass transition temperature (232 °C) and a wide band gap (3.8 eV). The Bphen-BCDI subnanolayers deposited on substrates were found to form organic nanoclusters, not a conventional layer. The OLED made with a subnanolayer of Bphen-BCDI nanoclusters, instead of a conventional ETL, showed greatly improved efficiency (about 2-fold) compared with an OLED without the diimide nanoclusters. The role of the BPhen-BCDI nanoclusters was assigned to hole trapping and electron injection in the present OLED structure.     

Fabrication of red, green, and blue organic light-emitting diodes using m-MTDATA as a common hole-injection layer

Organic light-emitting diodes (OLEDs) of metal-semiconductor-metal (MSM) structure have been fabricated by using m-MTDATA [4,4′,4′’-tris (3-methylphenylphenylamino) triphenylamine] as a hole-injection layer (HIL). The m-MTDATA is shown to be an effective hole-injecting material for the OLED, in that the insertion of m-MTDATA greatly reduces the roughness of anode surface, lowers the turn-on voltage, and increases the luminous efficiency. Red, green and blue OLEDs were fabricated, and their color coordinates in CIE chromaticity were found to be (0.600, 0.389), (0.240, 0.525) and (0.171, 0.171), respectively. The luminous efficiencies of the fabricated OLEDs were 1.4 lm/W at 106 cd/m² for red, 1.4 lm/W at 100 cd/m² for green, and 2.0 lm/W at 104 cd/m² for blue.     

Effective hole‐injection characteristics of organic light‐emitting diodes due to fluorinated self‐assembled monolayer embedded as a buffer layer

The electrical and optical properties of organic light‐emitting diodes (OLEDs) are demonstrated by varying the length of the alkyl chain of a fluorinated self‐assembled monolayer (F‐nSAM). OLEDs containing F‐nSAMs that have a long alkyl chain length were found to exhibit excellent properties in terms of current density, luminance, turn‐on voltage, etc. The obtained current density at 6 V, which was the highest measurement voltage, was up to about 36 times higher for an OLED including an F‐12SAM thin film with the longest chain length than for an OLED including only an indium tin oxide (ITO) substrate. With regard to luminance characteristics depending on voltage, the luminance was about 13 times higher for the OLED including the F‐12SAM thin film than for the OLED including only the ITO substrate. Also, the turn‐on voltage of the OLED including the F‐12SAM thin film was decreased by approximately 1 V compared to that of the OLED including only the ITO substrate. Although F‐nSAMs with alkyl chains have insulating film properties, F‐nSAMs with long alkyl chains exhibited good electrical and optical properties because of an improvement in the hole‐injection barrier due to a large positive shift of the vacuum level and smooth carrier injection resulting from a high contact angle due to strong hydrophobic properties caused by the good alignment properties of F‐nSAMs resulting from strong van der Waals forces between the molecules due to the long alkyl chains. © 2019 Society of Chemical Industry     

有机电致发光材料研究新进展

简要介绍了有机电致发光器件的结构、工作原理。重点从有机电致发光材料器件结构的角度出发,对电致发光材料最新研究进展进行了综述。     

Micromechanical modeling of roll‐to‐roll processing of oriented polyethylene terephthalate films

In this article, the thermo‐mechanical time‐dependent behavior of oriented polyethylene terephthalate (PET) films, which are used as a substrate material for flexible Organic Light‐Emitting Diode (OLED)s, is analyzed. These films are subjected to conditions that are representative for the industrial manufacturing process. Effects of creep and thermal shrinkage are experimentally observed simultaneously. The aim of the article is to demonstrate the ability of the micromechanically‐based model, which was previously used to separately describe both creep and thermal shrinkage of the polyethylene terephthalate film, to simulate experimentally observed anisotropic behavior of the film under complex loading conditions. This anisotropic behavior results from the microstructure, the internal stress state, and differences in constitutive behavior of the phases. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43384.     

Synthesis of cationic UV‐curable methacrylate copolymers and properties of the cured films of their composites with alicyclic epoxy resin

Cationic UV‐curable methacrylate copolymers consisting of glycidyl methacrylate, iso‐butyl methacrylate, and 2,2,3,4,4,4‐hexafluorobutyl methacrylate were synthesized, and their structures were characterized by FTIR, ¹H NMR, and ¹³C NMR. A series of UV‐cured composite films based on the synthesized copolymers and an alicyclic epoxy resin, 3,4‐epoxycyclohexylmethyl‐3,4‐epoxycyclohexanecarboxylate (CE) were obtained through photopolymerization. Their surface contact angle, chemical ability, gloss, light transmittance, thermal behavior, micromorphology, and shrinkage were investigated. Results indicated that these cured resins showed excellent gloss and visible light transmittance; after the combination of the copolymers and CE, and in the presence of fluorine in the curing systems they exhibited relatively fine water resistance, chemical, and thermal stability. It was observed that these copolymers could decrease the degree of the volume shrinkage to CE. The UV‐curable materials may have promising applications in optical fiber coatings, flip chip and Organic Light‐Emitting Diode (OLED) packing. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

有机电致发光功能色素材料的研究

介绍了有机电致发光材料的发展过程，阐述了空穴、电子传输材料。详细叙述了发光材料尤其是悬挂体系有机电致发光材料。提出了研究新材料的意义。     

Improving the image of an organic light‐emitting diode using a dye‐polariser

The present work investigated the image improvement of an organic light‐emitting diode (OLED) by using a dye‐polariser on the panel of an OLED. There are many key vision indexes that can be used to indicate the image performances of flat panel displays (FPDs), such as pixel solution, brightness, view angle, visual reflective sensitivity, contrast ratio, colour saturation and response time. In this study, a dye‐polariser was applied on the panel of an OLED and experiments were conducted to examine the image performances using some relative key vision indexes. The results clearly show the effectiveness of the dye‐polariser used. The OLED showed a reduction in visual reflective sensitivity by 86.6%, improved the contrast ratio of the image to 2.4 and 2.7 times in an indoor (or office) ambience (490 cd/m²) and an outdoor ambience (1375 cd/m²), respectively, increased colour saturation from 59.4% to 66.7%, and reinforced the weaknesses of the red and blue organic fluorescent materials. © 2011 Canadian Society for Chemical Engineering