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Pengcheng Jin Feng Tian Yanbing Han Lijiao Wang Xiaohui Zhao Jinchong Xiao 《化学:亚洲杂志》2019,14(23):4395-4399
The instability of large acenes and analogues usually limits their wide potentials in organic devices. Thus, effectively constructing large acenes or heteroacenes and examining their optoelectronic properties are of great interest. We herein describe the synthesis, optoelectronic behaviors and electroluminescent property of dimesitylboryl‐decorated azaarene 5 and its homologue 7 . The former emits strong green fluorescence in non‐polar solvents but yellow light in polar solvents. The latter emits a blue light in various organic solvents. Moreover, their electrochemical behavior, photostability and electroluminescent property were further studied in a comparative manner, and the experimental findings suggest that the desired heteroarenes are appealing materials for fabricating electroluminescent devices. 相似文献
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In this paper, the electroluminescent properties of a new partially‐conjugated hyperbranched poly (p‐phenylene vinylene) (HPPV) were studied. The single layer light‐emitting device with HPPV as the emitting layer emits blue‐green light at 496 nm, with a luminance of 160 cd/m2 at 9 V, a turn‐on voltage of 4.3 V and an electroluminescent efficiency of 0.028 cd/A. By doping an electron‐transport material [2‐(4‐biphenylyl)‐5‐phenyl‐1,3,4‐oxadiazole, PBD] into the emitting layer and inserting a thin layer of tris(8‐hydroxy‐quinoline)aluminum (Alq3) as electron transporting/hole blocking layer for the devices, the electroluminescent efficiency of 1.42 cd/A and luminance of 1700 cd/m2 were achieved. The results demonstrate that the devices with the hyperbranched polymers as emitting material can achieve high efficiency through optimization of device structures. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
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Prof. Dr. Suning Wang Deng‐Tao Yang Jiasheng Lu Hiroyuki Shimogawa Prof. Dr. Shaolong Gong Xiang Wang Soren K. Mellerup Prof. Dr. Atsushi Wakamiya Dr. Yi‐Lu Chang Prof. Dr. Chuluo Yang Prof. Dr. Zheng‐Hong Lu 《Angewandte Chemie (International ed. in English)》2015,54(50):15074-15078
New BN‐heterocyclic compounds have been found to undergo double arene photoelimination, forming rare yellow fluorescent BN‐pyrenes that contain two B? N units. Most significant is the discovery that the double arene elimination can also be driven by excitons generated electrically within electroluminescent (EL) devices, enabling the in situ solid‐state conversion of BN‐heterocycles to BN‐pyrenes and the use of BN‐pyrenes as emitters for EL devices. The in situ exciton‐driven elimination (EDE) phenomenon has also been observed for other BN‐heterocycles. 相似文献
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Ming‐Hsiang Shin Fung Fuh Wong Chun‐Min Lin Wen‐Yi Chen Mou‐Yung Yeh 《Heteroatom Chemistry》2006,17(2):160-165
New potential bluish‐green electroluminescent materials of 1,3,4‐oxadiazole–triazolopyridin‐ one–carbazole derivatives were synthesized and characterized for single‐layer devices. Carbazole, pyridine, and triazolopyridinone were completely introduced into 1,3,4‐oxadiazole skeletal to play assistant roles in controlling fundamental photolytic process due to the electron‐donating nature, excellent photoconductivity, and flexible structure properties. Following the spectroscopic studies and the measurements of cyclic voltammogram, 1,3,4‐oxadiazole–triazolopyridinone–carbazole derivatives were highly efficient bluish‐green electroluminescent materials. © 2006 Wiley Periodicals, Inc. Heteroatom Chem 17:160–165, 2006; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/hc.20201 相似文献
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Jiyong Deng Yafei Wang Xiaoshuang Li Meijun Ni Ming Liu Yu Liu Gangtie Lei Meixiang Zhu Weiguo Zhu 《中国化学》2011,29(10):2057-2062
A red‐emitting heteroleptic cyclometalated platinum(II) complex containing an ancillary ligand of pyrazol‐based diketone derivative was synthesized. Its optophysical and electroluminescent properties were studied. Compared to the reported (piq)Pt(acac) complex, this platinum(II) complex exhibited a blue‐shifted UV absorption band at 300–450 nm, a low LUMO energy level and improved electroluminescent property. Using this platinum(II) complex as a single doping emitter and a blend of ploy(9,9‐dioctylfluorene) and 2‐tert‐butylphenyl‐5‐phenyl‐1,3,4‐oxadiazole as a host matrix, the fabricated polymer light‐emitting devices displayed saturated red emission with a peak at 648 nm and a shoulder at 601 nm. Furthermore, the emission quenching of the platinum(II) complex was significantly suppressed in these devices at high current density due to an introduction of the non‐planar pyrazol group into the ancillary ligand. 相似文献
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Major classes of coordination compounds used as electroluminescent materials are surveyed, and their advantages and disadvantages
are discussed. The strategy of the directed synthesis of lanthanide(III) complexes promising for use as electroluminescent
materials is formulated. The results of studies dealing with the design of electroluminescent devices based on europium(III),
terbium(III), and thulium(III) complexes are considered. 相似文献
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Yingliang Liu Huayu Cao Jianghui Li Zhijian Chen Lixin Xiao Qihuang Gong Shaokui Cao 《先进技术聚合物》2008,19(12):1839-1843
An electroluminescent polymer was synthesized by Wittig condensation and characterized by the measurements of 1H‐NMR, IR, gel permeation chromatography (GPC), UV–Vis, PL, and cyclic voltammetry (CV). The polymer can be dissolved in common organic solvents such as tetrahydrofuran (THF), chloroform, and dichloromethane. The electroluminescent investigation showed that the non‐doped devices with a double‐layer configuration (ITO/PEDOT:PSS/Polymer/Mg:Ag) have a stable green emission property. The maximum luminance of the annealed device reaches 2317 cd/m2. The emission maximum and the CIE 1931 coordinate values are respectively stabilized at 552 nm and near (x, y) = (0.43, 0.55) with different voltages. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
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本文简述了有机电致发光及有机发光二极管的基本原理 ;概述了小分子配合物电致发光材料的最新研究进展 ,讨论了它们的光电性质、器件的发光效率和稳定性 ;展望了小分子配合物电致发光材料的前景. 相似文献
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A novel blue luminescent polymer bearing coumarin pendants was prepared. Its luminescent properties were determined indicating that it had strong blue fluorescent properies and good film formation ability. This novel polymer can be used as a blue organic electroluminescent material (OELM) in organic electroluminescent devices. 相似文献
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For the purpose of developing an amorphous molecular material with a high glass-transition temperature (Tg) and a low ionization potential for use as a charge-transport layer in organic electroluminescent (EL) devices, a novel starburst molecule, 4,4′,4“-tris[bis(4′-tert-butylbiphenyl-4-yl)amino]triphenylamine (t-Bu-TBATA), was designed and synthesized. t-Bu-TBATA was found to form readily a stable glass with a Tg of 203 °C. A multilayer EL device consisting of double hole-transport layers of t-Bu-TBATA and 4,4′,4“-tri(N-carbazolyl)triphenylamine and an emitting layer of tris(8-quinolinolato)aluminum was fabricated and its performances were examined. The device was found to exhibit good performances and to be thermally stable, operating even at 170 °C. 相似文献
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This tutorial review presents some recent developments in the design, synthesis and implementation of organic solution-processable molecular fluorophores for non-doped electroluminescent [corrected] devices. After a brief presentation of the basic principles of operation and main characteristics of electroluminescent devices, some examples of active emitters representative of the main classes of non-doped molecular electrofluorophores will be discussed. Emphasis is placed on the relationships between the molecular structure and the electronic properties of molecular emitters, in which high photoluminescence efficiency, synthetic accessibility and processability are combined by design with additional functions such as hole and/or electron injection and transport. 相似文献
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A. Greiner 《先进技术聚合物》1998,9(7):371-389
Polymers with aromatic ϕ-conjugated moieties were utilized as electroluminescent materials. In order to meet the requirements for light-emitting diodes (LED), the design and synthesis of electroluminescent polymers had to be developed and viewed in this review. Focus is on polymers with arylene vinylene, arylene ethinylene, phenylene, thiophene and arylene amine moieties as light-emitting, hole-transporting and electron-transporting materials in LED devices. An attempt has been made to arrange a structural classification of electroluminescent polymers in nonsegmented and segmented polymers. © 1998 John Wiley & Sons, Ltd. 相似文献
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Two new blue luminescent zinc and beryllium complexes with Schiff base calixarene derivative as the ligand were prepared.Their luminescent properties were determined,which indicated that they had strong blue fluorescent properties.They also had good solubility and film formation.These new complexes can be used as blue organic electroluminescent materials (OELMs) in organic electroluminescent devices. 相似文献
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单分子有机电致白光材料及器件 总被引:1,自引:0,他引:1
有机电致白光二极管在白光照明和背光源应用中具有材料来源广、驱动电压低、节能和环保等优点,受到了广泛关注。目前实现电致白光的方法主要有小分子掺杂、多层器件、激基复合物和缔合物发光以及单分子白光等方法。其中,单分子白光材料由于要控制能量的不完全传递、单分子实现多色同步发射和优化器件结构等,目前研究得还比较少,器件的总体性能相对还不是很理想。本文从材料合成的角度,简要综述了国内外在单分子白光材料的合成与器件性能优化方面所取得的研究进展,并对下一步需要研究的热点问题作了展望。 相似文献
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1,2‐Dihydrophosphete: A Platform for the Molecular Engineering of Electroluminescent Phosphorus Materials for Light‐Emitting Devices
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Hui Chen Simon Pascal Zuoyong Wang Dr. Pierre‐Antoine Bouit Zisu Wang Yinlong Zhang Denis Tondelier Bernard Geffroy Prof. Régis Réau Prof. François Mathey Prof. Zheng Duan Prof. Muriel Hissler 《Chemistry (Weinheim an der Bergstrasse, Germany)》2014,20(31):9784-9793
The discovery and molecular engineering of novel electroluminescent materials is still a challenge in optoelectronics. In this work, the development of new π‐conjugated oligomers incorporating a dihydrophosphete skeleton is reported. Variation of the substitution pattern of 1,2‐dihydrophosphete derivatives and chemical modification of their P atoms afford thermally stable derivatives, which are suitable emitters to construct organic light‐emitting diodes (OLEDs). The optical and electrochemical properties of these new P‐based oligomers have been investigated in detail and are supported by DFT calculations. The OLED devices exhibit good performance and current‐independent CIE coordinates. 相似文献