Efficient and color stable phosphorescent white organic light-emitting devices based on an ultra wide band-gap host

We report high efficiency phosphorescent white organic light-emitting devices (WOLEDs) employing single emissive layer (EML) based on an ultra wide band-gap host. Effective exciton/charge confinement and balanced recombination within EML was achieved by employing adequate interlayer and stepwise hole-transporting layer (step HTL) system. Moreover, this step HTL system lower driving voltage of WOLEDs, therefore power efficiency was enhanced over 40%. These WOLEDs showed external quantum, and power efficiencies of 17.6%, and 37.5 lm/W at 100 cd/m² without outcoupling enhancements. We also found that these WOLEDs exhibited little change of color coordinate from 100 to 10,000 cd/m².     

Theoretical studies on electronic structures,spectra and charge transporting properties of a series of Pt(CN)2 complexes

We report a quantum-chemical study of electronic, optical and charge transporting properties of four platinum (II) complexes, Pt(C^ΛN)₂ (C^ΛN = phenylpyridine or thiophenepyridine). The lowest-lying absorptions at 442, 440, 447 and 429 nm are all attributed to the mixed transition characters of metal-to-ligand charge transfer (MLCT) and ligand-centered (LC) π → π* transition. While, unexpectedly, the lowest-lying phosphorescent emissions at 663, 660, 675 and 742 nm are mainly from metal-to-ligand charge transfer (³MLCT) ligand-centered (LC) π → π* transition. Ionization potential (IP), electron affinities (EA) and reorganization energy (λ_{hole/electron}) were obtained to evaluate the charge transfer and balance properties between hole and electron. The calculated results reveal that the small structure changes of the charged states relative to the neutral ones, and the smaller IP and EA values indicate that they exhibit a relatively high structural stability versus the injection of one charge and have better holes than electron-injection abilities. The smaller λ values and the smaller differences (within 0.06 eV) between λ_hole and λ_electron indicate the better transfer balance between holes and electrons. Moreover, the attached methyl groups slightly improve the hole-injection ability and deduce the electron-injection ability. The strong phosphorescence emission and the favorable transporting properties compared with other reported complexes indicate their potential applications in as emitters OLEDs.     

小白鼠生物样本中铂的测定方法研究

应用石墨炉原子吸收光谱法测定小白鼠生物样本中的铂含量进行了研究。通过二步灰化法与塞曼背景扣除法相结合，较好地解决了生物样本中的背景干扰问题，测定尿样的相对标准偏差为3．00％、肾皮质部消化液相对标准偏差为5．26％、血清相对标准偏差为9．42％，简化了测定程序，建立了对小白鼠尿、血清、骨皮质部消化液等生物样本均有较好适应性的痕量铂的测定方法。     

有机电致发光器件的研究进展

系统介绍了有机电致发光器件(OLED)的结构和发光机理,从有机半导体的能带结构和OLED的能带结构,分析了OLED发光过程,指出了如何提高器件的发光效率。最后概述了器件的技术进展和应用前景,并展望了未来OLED发展的方向。     

Temperature analysis for optimizing the configuration of the linear cell

The market demand of display devices is drastically increasing in the information technology age. The research on OLED (Organic Light Emitting Diodes) display with the luminescence in itself is being more paid attention than LCD (Liquid Crystal display) with the light source from the back. The vapor deposition process is most essential in manufacturing OLED display. The temperature distribution of the linear cell in this process is closely related to securing the uniformity of organic materials on the substrate. This work analyzed the temperature distribution depending on the intervals between the crucible and the heating band as well as on the amount of the heat flux from the heating band. Moreover, the roles of the water jacket and the configuration of the cover within the linear cell were examined through the temperature analysis for six configurations of the linear cell. Under the above temperature analysis, the variations in the intervals and the amount of the heat flux were considered to have an effect on building the uniform temperature distribution within the crucible. It is predicted that the water jacket and the adequate configuration of the cover will prevent the blowout and clogging phenomena, respectively. The results can be used as the fundamental data for designing the optimal linear cell.     

OLED显示器件的原理及应用

介绍有机发光二极管(OLED)的特点、结构、发光原理以及微处理器AT89L51与VGG12864G-S002 OLED显示模块的接口应用.     

红外线测量仪在车身夹具维护上的应用

在造成汽车车身尺寸偏差的原因中,焊装夹具的定位元件磨损是最常见的也是较难发现的影响因素.加强夹具的监控对于提高车身尺寸稳定性有着重要的意义.红外线测量是从上世纪发展起来的一种全新的测量技术,本文介绍了利用红外线测量仪对工装夹具进行检测和维护的方法以及相关的理论和实例.     

基于白光干涉原理的全光纤多功能实验仪

介绍了一种新型全光纤多功能实验仪。实验仪采用了白光干涉原理,通过一套主机系统,组合功能模块,可实现八种不同的教学性实验,并可测量多种物理量。其中光路系统由无源光器件组成,具有组装方便、抗电磁干扰等特性。可以实现满足不同课程、不同专业阶段的实验要求。     

稀土铬合金白口铸铁的热塑性

对不同稀土含量低铬和高铬合金白口铸铁的可锻性。以及稀土对低铬和高铬合金白口铸铁热塑性的影响进行了研究。     

废塑料用于高炉喷吹的现状及前景

分析国外高炉喷吹废塑料的实践,并探讨我国应用的可行性。喷吹废塑料可以治理“白色污染”、节约能源,有良好的经济效益和社会效益。该项技术与目前其他几种回收利用废塑料技术相比投资更省,效益更好,更容易为社会所接受。对于我国开发该项技术,不仅需要在技术上还要努力,更重要的是需要政府部门、有关企业、消费者和废塑料回收机构的积极配合和支持,以便使这项技术尽早在我国实现工业化。