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51.
基于红色荧光染料3-(dicyanomethylene)-5, 5-dimethyl-1-(4-dimethylamino-styryl) cyclohexene的高性能白色有机电致发光器件 下载免费PDF全文
研究了基于红色荧光染料3-(dicyanomethylene)-5, 5-dimethyl-1-(4-dimethylamino-styryl) cyclohexene(DCDDC)的白色有机电致发光器件的性能,分别制备了基于DCDDC超薄层和DCDDC掺杂主体材料的两种器件结构: 1)indium-tin oxide(ITO)/N, N′-diphenyl-N, N′-bis(1-naphthyl-pheny1)-1, 1′-biphenyl-4,
关键词:
有机电致发光器件
白色发光
红色荧光染料
掺杂 相似文献
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F. Villani P. Vacca R. Miscioscia G. Nenna G. Burrasca T. Fasolino C. Minarini D. della Sala 《Macromolecular Symposia》2009,286(1):101-106
we report about the fabrication of organic light-emitting diodes (OLEDs) ink-jet printing a hole-transporting polymer (PF6, poly(9,9-dihexyl-9H-fluorene-2,7-diyl)) on flexible substrate (PET) and performing the other layers through vacuum thermal evaporation. The aim of the work is to employ the ink-jet printing (IJP) technology, familiar as a method for printing on paper, in optoelectronic applications and to determine how the deposition method affects the functional material film properties and hence the ultimate device performances. In this line of work, ink-jet printed polymer films are compared to same spin-coated polymer from the electro-optical point of view: both prepared materials are adopted as HTLs of electroluminescent devices. All manufactured OLEDs are characterized and their behaviours are investigated and analyzed with theoretical models. The results show differences in current density and optical behaviours between the devices fabricated by means of the above mentioned technologies which can be justified in terms of different trap distribution induced by impurity energy levels associated to each process. 相似文献
54.
为了开发新型多功能的蓝光电致发光材料与器件,设计并合成了一系列氟取代联蒽类材料(BAnFs),通过改变吸电子基团的取代模式,进而调节其光物理性能、热稳定性和能级.以CBP为主体、BAnFs为掺杂的器件表现出高效的深蓝光发光性能,对应的色坐标为CIE (0.15, 0.08),特别是对BAn-(3,5)-CF3器件的电流效率为3.05 cd/A,最大外量子效率(EQE)高达5.02;.同时BAnFs材料可作为高性能的蓝光主体材料,其EQE为3.56;~5.43;.因此,BAnFs可作为新型高性能的多功能蓝光发光材料. 相似文献
55.
有机硅化合物和有机硼化合物在有机半导体材料中的应用 总被引:1,自引:0,他引:1
有机硅化合物和有机硼化合物是有机化学中2类非常重要的化合物,它们在有机合成化学和材料化学等领域都有着广泛的应用。有机半导体材料是一个新兴的研究领域,这2类化合物在这个新兴领域中也有着独特的贡献。简单介绍了有机硅化合物和有机硼化合物在有机半导体材料中的应用。 相似文献
56.
Degradation phenomenon and poor stability of tris(8-hydroxyquinoline) aluminum(III)(Alq3)-based organic light-emitting diodes(OLEDs) have attracted much attention. In this paper, we discussed the origin of instability of the facial Alq3-based blue luminescent OLEDs with the help of first-principles calculation. The results show that environmental humidity seriously affects the luminescence stability of Alq3-based OLEDs. H2O molecules in environment can be firmly bound to the oxygen atoms of the facial Alq3, which then act as starting points for further degradation of Alq3. Moreover, the interactions between facial Alq3 and different cathode metal layers were investigated to explain the experiment phenomenon. A design guideline for diminishing the strong attraction from oxygen atoms can be proposed to protect Alq3 and improve the stability of materials applied in OLEDs. 相似文献
57.
《Current Applied Physics》2014,14(9):1188-1191
We have investigated the recombination zone in the phosphorescent white organic light-emitting devices with single host structure of multi-emission layers. Blue, green, and orange-red phosphorescent emitters were doped into the separate layers of single host material for fabricating the white devices with multi-emission layers. The electroluminescence spectrum was substantially modified by the shift of the recombination zone that was dependent upon the thickness of the electron transport layer. We investigated the recombination zone shift in terms of electric field distribution and carrier injection. A maximum external quantum efficiency of 15.9% and a maximum power efficiency of 28.9 lm/W were achieved by optimizing the recombination zone. 相似文献
58.
通过引入具有电子传输性能的噁二唑衍生物支链,采用Suzuki偶联反应,设计并合成了一种新型的蒽衍生物蓝光材料,同时研究了它的光学性能、热学性能、电化学性能以及成膜性。研究结果表明,该化合物在四氢呋喃溶液中发射蓝色荧光,最大发射波长为433 nm,其荧光量子效率为0.94,是9,10-二(β-萘基)蒽(ADN)的1.17倍。该化合物薄膜经过100 ℃高温烘烤3 h,依然保持连续、均一、平整的无定型结构,是制备长寿命、高效率OLED的很有潜力的材料。 相似文献
59.
以Cs2CO3修饰的Al电极作为反射阴极制备了高效倒置顶发射结构有机电致发光器件(ITOLED)。以八羟基喹啉铝(Alq3)作为发光层、MoO3修饰的Ag为半透明阳极时,器件的开启电压为3.6 V,发光效率和功率效率分别达到9.8 cd/A和3.4 lm/W。研究结果表明,Al/Cs2CO3为反射阴极的器件性能明显高于使用Mg:Ag(4.2 V,8.6 cd/A,2.85 lm/W)和Al(5 V,5.5 cd/A,1.57 lm/W)作为反射阴极的倒置顶发射OLED器件。单电子器件研究结果证明,以Cs2CO3修饰的Al电极功函数明显低于Mg:Ag和Al电极,具有更好的电子注入效果。因此,除去微腔效应外,Al/Cs2CO3为反射电极的ITOLED器件性能的提高主要归因于Al/Cs2CO3阴极的有效电子注入。 相似文献
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