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Applications of platinum complexes as phosphorescent emitters in high efficiency organic light-emitting diodes (OLEDs) were
shortly discussed in this paper. Key recent studies on highly efficient blue, green, red and white-phosphorescent OLEDs based
on Pt complexes are presented in terms of efficiency and color quality. 相似文献
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有机电致发光二极管(organic light-emitting diodes,OLED)在过去十多年中间获得了长足的发展,有望成为下一代高效固态光源。器件结构的改进和优化,新型材料的设计和合成以及电致磷光材料的普遍使用,使得目前WOLED的能量效率已经超过了传统的白炽光源。指出了OLED研究中的主要技术瓶颈,并对OLED技术在照明领域面临的机遇和挑战做出评述。 相似文献
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We have fabricated high-efficient white organic light-emitting diodes (WOLEDs) using two types of electron transport materials
with different electron mobility. The effect of the electron mobility on the device performance is discussed. In addition,
to generate the desired white emission and high color rendering index, we perform the structure design of OLED, in which the
functions of co-host of blue and green dopants on chromatic-stability are investigated. Experimental results find that the
maximum color rendering index reaches as high as 91 at the voltage of 8 V. 相似文献
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陈知新谢文明 《福建工程学院学报》2020,(6):587-592
利用红、绿、蓝三基色量子点材料作为发光层,使用旋涂法实现了3 种颜色的量子点发光二极管的制备。选择合适材料和溶剂形成各功能层薄膜,通过改变量子点溶液的浓度来调控器件的光电性能。对不同浓度下的量子点溶液制备的三色器件进行测试和比较,得到3 种颜色量子点溶液的合适浓度,使最终制备的三基色发光器件具有相同的制备工艺和相当的发光亮度,其亮度均可达到104cd/ m2的量级,为后续使用喷墨打印法来实现三基色QLED 提供理论和实践基础。 相似文献
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1Introduction Sincethefirstreportofefficientorganiclightemit tingdevices(OLED)byTang[1],OLEDshavebeen emergingastheleadingcandidateforthenextgenera tionplat paneldisplaysduetotheiradvantagessuchas fastresponsetime,largeviewingangle,highbright ness,lowoperatingvoltageandverythinthickness.Generally,theemissioncolorsoflayeredOLEDscan beabtainedbyselectingfluorescentmaterialswithdif ferentenergylevelsgapordopingtheorganicfilms withhighlyefficientfluorescentdopants.Sometimes,foracertaincombina… 相似文献
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利用TEXASINSTRUMENTS公司生产的MSP430F149型16位的单片机,可以设计成为针对红外热像仪的电路板信号故障检测硬件电路。该电路利用单片机内部的12位A／D转换器以及外置16位A／D芯片对模拟信号进行数据采集转换,并通过LED发光二极管将检测结果显示出来。同时也可利用单片机的USART串口,将数据传输给上位机（Pc）。该设计具有硬件电路简单、采集精度高、实时显示等优点。 相似文献
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In order to compare two kinds of blue electroluminescent materials,we have investigated two kinds of blue OLEDs with the similar structure ITO/CuPc/NPB/JBEM:perylene/Alq/Mg:Ag[device(J)] and ITO/CuPc/NPB/DPVBi:perylene/Alq/Mg:Ag[device(D)].The difference of luminance and efficiency was not obvious for the two devices,However,there was remarkable difference for their lifetime.The device(J) achieved longer half lifetime of 1035h at initial luminance of 100 cd/m^2,and that of device(D) was only255h,According to their energy level diagrams,the differentce of their stability may originate from different host materials in the two devices.It may be attributed to the better thermal stability of JBEM molecues than that of DPVBi.It is shown that JBEM may be a promising blue organic electroluminescent material with great stability. 相似文献
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杨惠山 《泉州师范学院学报》2008,26(2):44-48
制备一种利用4,4’,4＂-tris（3-methylphenylphenylamino）-triphenylamine（m—MTDATA）作为空穴注入缓冲层的器件．m—MTDATA增加部分从阳极ITO注入到有机层NPB的空穴,从而平衡了空穴和电子的注入．有缓冲层的有机发光器件比没有缓冲层有机发光器件的电流效率有了明显的提高．当缓冲层m-MTDA—TA为25nm时,最大电流效率在7V时达到3．15cd／A．是没有缓冲层器件电流效率的近3．5倍． 相似文献
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稀土铕配合物是红色荧光材料的一种，具有有机化合物的高发光量子效率和无机化合物良好稳定性的双重优点，是很有应用前景的一类发光材料。本文从材料结构的角度出发，对铕配合物的配体和发光机理加以概述，讨论分子结构对材料性能的影响，并针对目前存在的问题，提出相应的研究设想。 相似文献
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A new blue electroluminescent material,distyrylarylene(DSA)derivative,4,4‘-bis[2,2-(1-naphthyl,phenyl)vinyl]-1,1-biphenyl(NPVBi)is designed and synthesized.The DSA derivative shows better thermal stability because of its high glass transition temperature.A blue organic light emitting diode(OLED0with the structure ITO/TPD/NPVBi/Alq/LiF/Al is studied.The electroluminescent(EL0spectrum of the OLED exhibits that light emission originates from NPVBi with a peak at 460nm,its Commission Internationale de l‘Eclairage(CIE)color coordinates are x=0.16,y=0.15,and showing independence of CIE color coordinates on current density.The new DSA derivative is expectable as a new candidate for blue light emitter in OLEDs. 相似文献
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1 Introduction Organiclight emittingdiodes(OLEDs)haveattract edconsiderableattentionduetoitsgreatpotentialinefficiency ,low voltage ,large area ,lightweight ,andfull colorflat paneldisplays[1,2 ] .Forfull colordis plays ,itisnecessarytohaveefficientred ,green ,andblueemitterswithappropriatechromaticity .Bycom parisonwiththehighperformanceofblueandgreenOLEDs ,theperformanceandpurechromaticityofredOLEDsarestillrelativelypoor .UsuallyredOLEDsareimprovedbydopingreddyesintohostmaterialswit… 相似文献
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杨惠山 《泉州师范学院学报》2008,26(6):34-36
制备了利用KCl／Al作为负电极的有机电致发光器件,器件结构为IT0／NPB／Alq／KCl／Al,KCl层的加入增强了电子注入,当其厚度为1．5nm时,器件的性能最好．与单层Al电极的同类器件相比,此时器件的开启电压由Al电极时的5V降低到了2．5V。器件的亮度在11V时由231cd／m^2提高到15070cd／m^2,器件的发光效率也增加了10倍,达到2．79cd／A． 相似文献
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国家和社会对资源节约和环境保护提出了新的要求,发光二极管（LED）照明作为新兴节能光源逐渐应用到路灯上,并以其优良的性能和广阔的发展前景渐渐体现出取代被誉为第三代路灯照明光源——高压钠灯的趋势。因此,发光二极管道路照明技术的研究对照明节能设计具有重要的现实意义,本文将结合CAT4101芯片特点和应用实际对发光二极管道路照明电路设计及相关特性进行浅析。 相似文献
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Emission characteristics of top emitting organic light-emitting devices (TOLEDs) with Ag as reflective anode, Al/Ag as semitransparent
cathode and 90–160 nm [N-(1-naphthy1)-N-pheny1-amino] bipheny1/tris-(8-hydroxy quinoline) aluminum (NPB/Alq3) sandwiched in the electrodes are examined. The electroluminescence (EL) spectra of the TOLEDs are simulated based on the
Fabry-Perot cavity theory. And the resonant modes in cavity structure of TOLEDs is discussed and clarified which can accurately
describe the work principle of the devices. A fairly good match between calculated values and experimental data is achieved
at different emission colors from bluish green to orange. 相似文献
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ZHANG Bu xin ZHANG Zhi lin ZHU Wen qing JIANG Xue yin XU Shao hong School of Material Science Engineering Shanghai University Shanghai China 《上海大学学报(英文版)》2001,5(2):151-155
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In this paper, a multi-functional development platform for flat panel display (FPD) development is proposed. With the proposed
development platforms, a variety of FPD devices, including organic light-emitting diode (OLED) screens, liquid crystal display
(LCD) screens with touchscreens, OLED microdisplay screens, etc., can be directly and instantly connected, examined and utilized. A field-programmable gate array (FPGA) is used in the development
system to drive different types of FPD devices, and ARM11 S3C6410 is used as the application processor to provide various
services. The development system uses Linux as the system kernel, Qt for Embedded Linux as the UI framework, various system
libraries for video and audio services, and a custom-made user engine for fine-polished appearance and behavior. The development
platform has been used not only in testing and verification of the FPD devices, but also in building OLED-powered handheld
digital devices, shortening the development cycle from OLED devices to mature application products. 相似文献
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Affective factors such as the achievement emotions are considered critical for students’ academic performance in STEM degree programmes and careers. In this study, a reciprocal causation model was tested between two affective factors: enjoyment and anxiety, and organic chemistry course performance. Each variable was measured three times in four sections of a first semester organic chemistry course. This study investigates a reciprocal causation relationship between anxiety, enjoyment and achievement as measured by exam performance compared to unidirectional structures of performance and affect relationships. Results show that the reciprocal causation model with an exam snowballing effect best fits data among the alternative models. There is a small and significant negative relationship between anxiety and performance contrasted with a positive relationship between enjoyment and performance throughout the semester. The evidence of the reciprocal relationship between anxiety, enjoyment and achievement indicates that instructors of organic chemistry can work to eliminate factors associated with low performance. Gathering information regarding anxiety and enjoyment along with performance can inform educators about the emotional state of their classrooms. Future research should consider achievement emotions in light of educational reforms to ensure that innovative curricula or pedagogies are functioning in the classroom as intended. 相似文献