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1.
作为一类特殊的发光材料,稀土配合物是全彩平板显示器件中理想的发光材料之一,具有独特的优势和重要的地位,因而最早引起了研究人员的广泛关注.本文综述了近年来新型稀土铕、铽配合物的设计合成与基于稀土铕、铽配合物电致发光器件的设计优化,总结了优化稀土配合物电致发光性能的几种常用途径,进而着重介绍了稀土铕、铽、钆配合物作为敏化剂在有机电致发光器件中的新应用.研究结果表明,稀土配合物作为敏化剂的应用能够实现稀土配合物与过渡金属配合物的优势互补,大幅提高了有机电致发光器件的综合性能,为新型高性能有机电致发光器件的设计与优化提供了新思路.  相似文献   

2.
稀土有机电致发光研究进展   总被引:20,自引:4,他引:16  
介绍了近年来有机电致发光研究中稀土有机电致发光研究的动态,对稀土有机配合物的选择、配合物的载流子传输性能、稀土有机电致发光器件、电致发光与光致发光的关系以及如何提高电致发光器件亮度等问题进行了讨论。  相似文献   

3.
稀土配合物的光致发光和电致发光研究   总被引:40,自引:2,他引:38  
黄玲  黄春辉 《化学学报》2000,58(12):1493-1498
报道了稀土配合物在光致发光和电致发光的应用,从结构和性能的角度,分析了沁同稀土配合物的发光特性以及不同第一配体和第二配体对光致发光和电致发光的影响。  相似文献   

4.
稀土有机配合物电致发光研究进展   总被引:2,自引:0,他引:2  
稀土配合物发射带窄, 发射光谱具有类原子光谱性质, 色纯度高(半宽峰<10 nm), 非常适合于全彩色显示. 另外, 稀土配合物发光效率高, 理论上内量子效率可达100%. 因此, 稀土配合物是全色平板显示器件中理想的发光材料之一, 研究稀土配合物电致发光性质具有重要的实际意义和理论意义. 以稀土镧系离子配合物作为发光中心的电致发光器件的研究主要集中于发光效率比较高的Eu3+, Tb3+ 以及近红外的Nd3+, Yb3+和Er3+ 离子. 分类综述了近年稀土配合物电致发光研究的成果及其进展. 总结了不同类型的铕配合物、铽配合物的电致发光特性, 证明配体对于稀土离子的敏化作用非常重要; 总结了近红外的镱、钕、铒配合物在光放大、激光技术、生物医学等方面的潜在应用价值.  相似文献   

5.
稀土配合物发射带窄,发射光谱具有类原予光谱性质,色纯度高(半宽峰<10 nm),非常适合于全彩色显示.另外,稀土配合物发光效率高,理论上内量子效率可达100%.因此,稀土配合物是全色平板显示器件中理想的发光材料之一,研究稀土配合物电致发光性质具有重要的实际意义和理论意义.以稀土镧系离子配合物作为发光中心的电致发光器件的研究主要集中于发光效率比较高的Eu3+,Tb3+以及近红外的Nd3+,Yb3+和Er3+离子.分类综述了近年稀土配合物电致发光研究的成果及其进展.总结了不同类型的铕配合物、铽配合物的电致发光特性,证明配体对于稀土离子的敏化作用非常重要;总结了近红外的镱、钕、铒配合物在光放大、激光技术、生物医学等方面的潜在应用价值.  相似文献   

6.
铕配合物电致发光研究进展   总被引:7,自引:1,他引:6  
稀土铕配合物电致发光研究已经进入了一个关键阶段。本文在综述近年来铕配合物光致发光和电致发光研究现状的基础上,从铕配合物材料设计和器件结构优化的角度,讨论了影响其电致发光性能的几个重要因素。针对存在的铕配合物挥发性和热稳定性的问题提出了一些可能的解决办法,如通过提高阴离子配体或中性配体的挥发性来改善铕配合物整体挥发性能;修饰中性配体,增强其与铕离子的键合能力,提高配合物的热稳定性。  相似文献   

7.
铕配合物OEL器件中激基复合物发光机制及消除   总被引:1,自引:1,他引:0  
有机电致发光无论在科学研究还是在实际应用上都极大地吸引了人们的兴趣[1~3]。在研究的过程中,人们开发了许多的有机电致发光材料,在众多的材料中,稀土配合物有着明显的优势:由于稀土配合物能够利用配体三重态的能量,使得它的内量子效率在理论上能达到100%,而其它材料除了磷光染料[4,5]外内量子效率只能达到25%,同时稀土配合物中心离子的窄带发射有利于全色显示。目前,在有机电致发光领域实现高效纯红的窄带发光是一个很大的挑战,因为在基于颜色叠加原理的全色显示中,获得纯的红色发光是至关重要的。而三价稀土配合物中铕离子的红色发…  相似文献   

8.
苯甲酰水杨酸铽与PVK混合体系的发光特性   总被引:11,自引:6,他引:5  
合成了一类以苯甲酰水杨酸(benzoyl salicylic acid,BSA)为第一配体,邻菲罗啉(1,10-phenanthroline,Phen)为第二配体的稀土铽配合物,将导电高分子材料PVK引入到配合物中,制成了结构为ITO/PVK:Tb(BSA)3phen/PBD/Alq/LiF/Al电致发光器件,并对该配合物的吸收特性及电致发光和光致发光性能进行了研究,实验数据表明在PVK与Tb(BSA)3phen之间存在着Forster能量传递,该配合物具有很好的光致发光和电致发光性能。本文同时比较了几种不同PVK掺杂浓度对于器件性能的影响。  相似文献   

9.
Eu(BSA)3phen与PVK共混体系的光致和电致发光特性的研究   总被引:9,自引:4,他引:5  
合成了一类新型的以苯甲酰水杨酸(benzoyl salicylic acid,BSA)为第一配体,邻菲罗啉(1,10-phenanthroline,phen)为第二配体的稀土配合物Eu(BSA)3phen,将导电高分子材料PVK引入到配合物中,制成了结构为ITO/PVK:RE配合物/LiF/Al的电致发光器件.通过测量电致发光和光致发光光谱,发现PVK:RE配合物混合体系存在着能量传递,并对Eu(BSA)3phen与PVK共混体系的光致发光和电致发光机制进行了分析.同时比较了几种不同PVK掺杂浓度对于器件性能的影响.  相似文献   

10.
铽配合物TbY(o-MBA)6(phen)2与PVK掺杂体系的发光性质研究   总被引:2,自引:2,他引:0  
合成了一种新型的稀土铽配合物材料TbY(o-MBA)6(phen)2,把它作为发光材料应用于有机电致发光中.把铽配合物掺杂在导电聚合物PVK中采用旋涂法制得发光层,并利用AlQ作为电子传输层制作了多种结构的电致发光器件 器件A,ITO/PVK∶TbY (o-MBA)6(phen)2/LiF/Al;器件B,ITO/PVK∶TbY (o-MBA)6(phen)2/AlQ/LiF/Al;器件C,ITO/PVK∶TbY (o-MBA)6(phen)2/BCP/AlQ/LiF/Al.对器件A和B得到了纯正的、明亮的Tb3+离子的绿光发射,4个特征峰分别对应着能级5D4到7Fj(j=6,5,4,3)的跃迁,而PVK的发光完全被抑制.研究了掺杂体系的光致发光性能和电致发光性能,认为在光致发光中,铽的发光主要来源于PVK到稀土配合物的Frster能量传递.而在电致发光中,铽的发光主要来源于稀土配合物直接捕获载流子形成激子复合发光.并通过优化选择得到了发光性能较好的器件B,其最大亮度在14 V时达到213 cd·m-2.  相似文献   

11.
左氧氟沙星(LOFX)是一种知名的抗菌药物,它的价格非常便宜,且有成熟的合成和纯化技术.本文中首次将LOFX作为一种蓝光发光材料和电子传输材料应用于有机电致发光器件(OLED)中.通过热重分析、UVVis吸收光谱、发射光谱以及循环伏安曲线详细地表征了LOFX的热学及光物理特性.LOFX有高的分解温度,为327°C;HOMO、LUMO能级分别为-6.2和-3.2 e V,光学带隙为3.0 e V.以LOFX作为客体材料,掺杂在主体材料4,4’-二(9-咔唑)联苯(CBP)中制备了蓝光OLED,该器件的电致发光(EL)发射峰位于452 nm,最大亮度为2315 cd·m-2.进一步,选择8-羟基喹啉铝(Alq3)作为参考材料,分别以LOFX和Alq3作为电子传输材料制备了结构相同的单载流子器件和绿色磷光OLED.在相同的电压下,以LOFX作为电子传输材料的单载流子器件的电流密度比以Alq3作为电子传输材料的单载流子器件更高.同时,以LOFX作为电子传输材料的绿色磷光OLED获得更高的器件效率.从这些EL性能可以看出,LOFX同时也是一很好的电子传输材料.  相似文献   

12.
Highly fluorescent blends based on PVK (poly(N-vinylcarbazole)) doped by a new greatly anisometric Eu(III) mesogenic complex were described. The structure of the ligands in the complex was selected in such a way that its absorption maximum was close to the emission maximum of the polymer. The full-energy transfer conditions in the conjugated polymer–lanthanide complex blends were revealed. Improving luminescence efficiency of the blend occurs due to an increase in the threshold concentration of the emitting ions to prevent self-quenching phenomena. The resulting relative luminescence quantum yield of the blend increases more than twice in comparison with the individual complex. The optimized blends may be promising for application as red emitters for OLED, etc.  相似文献   

13.
研究了氧化石墨烯(GO)掺杂聚(3,4-亚乙二氧基噻吩):聚(苯乙烯磺酸)(PEDOT:PSS)作为空穴注入层对有机发光二极管发光性能的影响.在PEDOT:PSS水溶液中掺入GO,经过湿法旋涂和退火成膜后,不仅提高了空穴注入层的空穴注入能力和导电率,透光率也得到了相应的提高,从而使得有机发光二极管(OLED)器件的发光性能得到了提升.通过优化GO掺杂量发现,当GO掺杂量为0.8%(质量分数)时,空穴注入层的透光率达到最大值(96.8%),此时获得的OLED器件性能最佳,其最大发光亮度和最大发光效率分别达到17939 cd·m-2和3.74 cd·A-1.与PEDOT:PSS作为空穴注入层的器件相比,掺杂GO后器件的最大发光亮度和最大发光效率分别提高了46.6%和67.6%.  相似文献   

14.
A fluorescence detection system for a microfluidic device using an organic light-emitting diode (OLED) as the excitation light source and a charge-coupled device (CCD) as the photo detector was developed. The OLED was fabricated on a glass plate by photolithography and a vacuum deposition technique. The OLED produced a green luminescence with a peak emission at 512 nm and a half bandwidth of 55 nm. The maximum external quantum efficiency of the OLED was 7.2%. The emission intensity of the OLED at 10 mA/cm(2) was 13 μW (1.7 mW/cm(2)). The fluorescence detection system consisted of the OLED device, two band-pass filters, a five microchannel poly(dimethylsiloxane) (PDMS) microfluidic device and a linear CCD. The fluorescence detection system was successfully used in a flow-based enzyme-linked immunosorbent assay on a PDMS microfluidic device for the rapid determination of immunoglobulin A (IgA), a marker for human stress. The detection limit (S/N=3) for IgA was 16.5 ng/mL, and the sensitivity was sufficient for evaluating stress. Compared with the conventional 96-well microtiter plate assay, the analysis time and the amounts of reagent and sample solutions could all be reduced.  相似文献   

15.
Tris-beta-diketonate lanthanide(III) complexes (Ln = Eu, Er, Yb, Tb), of general formula [Ln(acac)3 L(m)], with chelating ligands such as 4,7-disubstituted-1,10-phenanthrolines and 4,4'-disubstituted-2,2'-bipyridines, have been synthesized and fully characterized. The inductive effects of the para-substituents on the aromatic N-donor ligands have been investigated both in the solid and in the solution states. Single-crystal X-ray structures have been determined for the diethyl 1,10-phenanthroline-4,7-dicarboxylate europium and 4,4'-dimethoxy-2,2'-bipyridine erbium derivatives, revealing a distorted square antiprismatic geometry around the lanthanide atom in both cases. The influence exerted by the p,p'-substituents with respect to the nitrogen coordinating atoms on the Ln-N bond distances is discussed comparing the geometrical parameters with those found for the crystal structures containing the fragments [Ln(III)(phen)] and [Ln(III)(bipy)] obtained from the Cambridge Structural Database. The influence exerted by the electron-attracting groups on the coordination ability of the ligands, that in some cases becomes lack of coordination of the lanthanide ions, has been also detected in solution where the loss of the ligand has been followed by UV-vis spectroscopy. Moreover, the use of relatively long alkoxy chains as substituents on the 1,10-phenanthroline ligand led to the formation of a promesogenic lanthanide complex, whose thermal behavior is encouraging for the synthesis of new lanthanide liquid-crystalline species.  相似文献   

16.
小分子有机电致发光器件和材料的研究及应用   总被引:3,自引:0,他引:3  
有机电致发光器件(OLED)是在电场作用下,以有机材料为活性发光层的器件.由于OLED具有亮度高、响应快、视角宽、工艺简单、可柔性等优点,在现代科学研究及技术应用中备受关注.其商业化应用,诸如平板显示(FPD)和固体照明(SSL)等,正在不断向前推进.本文综述了小分子OLED的各种器件结构和功能材料研究进展以及该领域存...  相似文献   

17.
Core–shell structured nanoparticles are increasingly used to host luminescent lanthanide ions but the structural integrity of these nanoparticles still lacks sufficient understanding. Herein, we present a new approach to detect the diffusion of dopant ions in core–shell nanostructures using luminescent lanthanide probes whose emission profile and luminescence lifetime are sensitive to the chemical environment. We show that dopant ions in solution‐synthesized core–shell nanoparticles are firmly confined in the designed locations. However, annealing at certain temperatures (greater than circa 350 °C) promotes diffusion of the dopant ions and leads to degradation of the integrity of the nanoparticles. These insights into core–shell nanostructures should enhance our ability to understand and use lanthanide‐doped luminescent nanoparticles.  相似文献   

18.
Synthesis, absorption spectra and luminescebce properties of a series of lanthanide trisbipyridine cryptates Ln within R-Bpy x R-Bpy x R-Bpy, where Ln = Eu, Gd and R = H, COOH, COOCH3, CONH(CH2)2NH2 are described. Comparison of the unsubstituted parent compound with the substituted compounds shows that bipyridine substitution doesn't alter significantly the photophysical properties of the lanthanide cryptate. The absorption maximum is slightly red-shifted when three bipyridines are substituted, whereas substituting one bipyridines has a negligible effect on the absorption spectra. The experimental triplet state energy is between 21600 and 22 100 cm(-1) for the series of compounds and the luminescence lifetimes at 77 K are between 0.5 and 0.8 ms in HO2 and equal to 1.7 ms in D2O. The experimental characterizations are completed by DFT and TD-DFT calculations to assess the ability of these approaches to predict absorption maxima, triplet state energies and structural parameters of lanthanide cryptates and to characterize the electronic structure of the excited states. The calculations on the unsubstituted parent and substituted compounds show that absorption maxima and lowest 3pipi* triplet state energies can be accurately determined from density functional theory (DFT) and time-dependent (TD) DFT calculations.  相似文献   

19.
Organic optocoupler(OOC) or organic photocoupler,optical coupler is a novel and one of the most promising organic optoelectronic devices for its well electrical isolation and anti-jamming ability in long-distance and real-time digital communications.The performance parameters of OOC were greatly raised during the past decade,and its development was strongly associated with basic organic devices such as organic light emitting diodes(OLED),organic photodiodes(OPD) and organic phototransistors(OPT) etc.Here we...  相似文献   

20.
有机发光二极管(organic light-emitting diodes,OLED)具有可柔性制备、低驱动电压、低功耗等优点,近年来技术上的突飞猛进及其广泛的应用前景,使之成为平板显示、新型照明、可穿戴,以及智能电子产品开发中最热门的研究课题之一。作为新一代的显示及照明技术,小尺寸OLED显示器已实现商业化,大尺寸OLED电视和家用照明也有产品问世,但OLED器件在可穿戴、智能电子等领域的应用仍处于探索期。本文综述了近年来OLED器件在新型应用领域国内外的研究状况,介绍了其在车载照明、智能车窗、可穿戴医疗、智能包装等领域的发展。最后对OLED器件应用的未来发展趋势进行了展望。  相似文献   

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