共查询到20条相似文献,搜索用时 296 毫秒
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吕延晓 《精细与专用化学品》2007,15(12):27-29
(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 相似文献
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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。 相似文献
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采用Langmuir-Blodgett(LB)膜诱导沉积法制备聚3,4-乙烯二氧噻吩高度有序导电聚合物复合薄膜,研究了薄膜的导电性能并进一步研究薄膜在改善器件性能方面的作用。将其应用于有机电致发光二极的空穴缓冲层,将聚3,4-乙烯二氧噻吩聚苯乙烯磺酸复合LB膜沉积于铟锡氧化物(ITO)电极上,制备了以复合LB膜为空穴缓冲层的有机电致发光二极。发现复合LB膜改善了器件性能(启动电压降低、最大亮度增加),但进一步的研究表明,LB膜器件在一定时间后出现性能劣化,X射线反射率(XRR)分析表明薄膜的结构发生一定程度的改变,是导致器件性能变差的可能原因。 相似文献
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Blue Fluorescence and Bipolar Transport Materials Based on Anthracene and Their Application in OLEDs
The phenomenon of organic electroluminescence (EL) was first discovered from studies on anthracene crystals in the 1960s. Since then, its derivatives have been studied extensively in applications such as organic light-emitting diodes (OLEDs) and organic thin-film transistors because of their excellent EL, transport, and good electrochemical properties. A blue fluorescence emitter based on anthracene is also important in constructing hybrid tandem white OLEDs for lighting applications. This article provides a review about the development of blue host OLED materials based on molecules designed and derived from the core structure of anthracene and their application as bipolar charge-carrier transport materials in OLEDs. The recent development of efficient, stable, blue-doped p-i-n OLEDs with simplified device architecture based on the single common host 2-methyl-9,10-di(2-napthyl)anthracene, with its stable thin-film morphology, large band gap energy, high fluorescence quantum yield, and ambipolar charge-carrier transport properties, is also highlighted. 相似文献
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Hwangyu Shin Yun-Fan Wang Jong-Hyung Kim Jaehyun Lee Kwang-Yol Kay Jongwook Park 《Nanoscale research letters》2013,8(1):421
Three new blue-emitting compounds of 5P-VA, 5P-VTPA, and 5P-DVTPA for organic light-emitting diode (OLED) based on hexaphenylbenzene moiety were demonstrated. Physical properties by the change of the substitution groups of the synthesized materials were systematically examined. Photoluminescence spectrum of the synthesized materials showed maximum emitting wavelengths of about 400 to 447 nm in solution state and 451 to 461 nm in film state, indicating deep blue emission color. OLED devices were fabricated by the synthesized compounds using vacuum deposit process as an emitting layer. The device structure was ITO/2-TNATA 60 nm/ NPB 15 nm/ EML 35 nm/ TPBi 20 nm/ LiF 1 nm/ Al 200 nm. External quantum efficiencies and CIE values of 5P-VA, 5P-VTPA, and 5P-DVTPA were 1.89%, 3.59%, 3.34%, and (0.154, 0.196), (0.150, 0.076), (0.148, 0.120), respectively. 5P-VTPA and 5P-DVTPA exhibited superior highly blue quality and thermal property such as high Td of 448°C and 449°C. 相似文献
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以2,7-二碘-9,9-二甲基芴为原料分别经过Buchwald-Hartwig交叉偶联反应、Ullmann反应,对目标化合物9,9-二甲基N2,N7二苯基N2,N7二-对甲苯基-9H-芴-2,7-二胺(d-TPA)进行合成研究。通过1H NMR、13C NMR以及HRMS-ESI等表征方法确定结构的正确性。研究表明:以铜粉为催化剂的Ullmann反应收率为85%,是最高效的合成方法。通过X射线衍射(XRD)测试和循环伏安法(CV)测试,结果表明:该材料为非晶材料,成膜性较好,且目标化合物的HOMO轨道能级值为-5.23 eV,与常用阳极材料ITO功函相近且化学稳定性较好,有利于空穴由阳极向空穴传输层的注入。将目标化合物用作空穴传输材料制备了有机发光二级管(OLED)并进行性能测试表征,结果显示:所得器件的启亮电压为3.8 V,最大发光亮度为21 412 cd/m2,最大电流效率为4.78 cd/A,表明该化合物有望成为一种性能优异的新型空穴传输材料。 相似文献
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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. 相似文献
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HONG-JUN YOU QIONG DU ZHI-YONG ZHANG CHUAN-JIANG LI JINGTAO GUAN BEN-MEI WEI 《Polycyclic Aromatic Compounds》2013,33(5):589-599
A series of novel blue light-emitting materials, spirofluorene derivatives, DBSF, 3DBSF, and 5DBSF, based on 2′,7′-dibromospiro- [benzo[c]fluorene-7,9′-fluorene] (DBrSPFF) were successfully synthesized and identified by IR, 1H-NMR, and13C-NMR, MS. Optical properties were examined by UV-Vis absorption spectra and photoluminescence (PL) emission spectra. They performed great blue light characteristics. PL quantum yield was calculated by using quinine sulphate in 0.1M H2SO4 as standard. Electro-chemical behavior was examined through cyclic voltammeter measurement. They may be potential promising blue light-emitting materials for OLED. 相似文献
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以N-苯基-1-萘胺和对溴碘苯为起始原料,经Buchwald-Hartwing偶联反应合成有机发光二极管空穴传输材料N,N′-二[4-(1-萘基苯基氨基)苯基]-N,N′-二苯基-[1,1′-联苯]-4,4′-二胺(2)。以1-溴化萘(1-溴萘)为初始原料与N,N′-二苯基联苯二胺经Buchwald-Hartwing偶联合成了N,N′-[二(1-萘基)-N,N′-二苯基]-1,1′-联苯基)-4,4′-二胺(NPB)。利用~1HNMR、LC-MS等对产品结构进行表征。通过差示扫描量热仪(DSC)测得化合物2和NPB失重5%的温度分别为510℃和491℃,化合物2的玻璃化转变温度Tg为126℃,化合物2和NPB的升华温度分别为395℃和290℃,并通过UV-Vis紫外吸收光谱、荧光光谱研究了两种传输材料的光学性质。 相似文献