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微腔有机电致发光白光器件设计及制作
引用本文:张春玉,陆景彬,秦莉,胡华炜,孔令炜.微腔有机电致发光白光器件设计及制作[J].发光学报,2009,30(5):596-600.
作者姓名:张春玉  陆景彬  秦莉  胡华炜  孔令炜
作者单位:1. 吉林建筑工程学院 材料科学与工程学院, 吉林 长春 130021;2. 吉林大学 物理学院, 吉林 长春 130021;3. 中国科学院长春光学精密机械与物理研究所 激发态物理重点实验室, 吉林 长春 130033
基金项目:国家自然科学基金,吉林省科技厅项目 
摘    要:用一种宽谱带材料Alq3作为发光层,设计并制作白色有机微腔电致发光器件。器件结构:Glass/DBR/ITO(194 nm)/NPB(93 nm) /Alq3(49 nm)/MgAg(150 nm),得到了位于蓝(488 nm)和红(612 nm)光区域的两个腔发射模式,并通过颜色匹配获得了白光。器件的最大电致发光亮度16 435 cd/m2,最大效率11.1 cd/A,典型亮度值100 cd/m2时的发光效率、电压、电流密度分别是9 cd/A,6 V和1.2 mA/cm2,CIE 色坐标为(0.32, 0.34)。在不同的驱动电压下,器件的发光颜色稳定,说明了微腔是一种制作白光OLED的有效结构。

关 键 词:有机电致发光器件  微腔  白光  腔模式
收稿时间:2009-01-25

Design and Fabrication of Organic Light-emitting White-color Microcavity Device
ZHANG Chun-yu,LU Jing-bin,QIN Li,HU Hua-wei,KONG Ling-wei.Design and Fabrication of Organic Light-emitting White-color Microcavity Device[J].Chinese Journal of Luminescence,2009,30(5):596-600.
Authors:ZHANG Chun-yu  LU Jing-bin  QIN Li  HU Hua-wei  KONG Ling-wei
Institution:1. School of Materials Science and Engineering, Jilin Architectural and Civil Engineering Institute, Changchun 130021, China;2. Jilin University, College of Physics, Changchun 130021, China;3. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
Abstract:White organic light-emitting diodes (OLEDs) have been attracted much attention due to the potential applications in illumination light source and back light for liquid crystal display (LCD) as well as full color displays. A general solution to realizing white color OLEDs is to use separate multiple emitter-layers to produce different colors. The white light is achieved based to the color mixing. Unfortunately, the electroluminescent (EL) performances of this kind of devices such as color stability and efficiency still need improved. An optical microcavity has a structure with at least one space dimension on the order of optical wavelength. In a microcavity device, only one or a few optical modes are able to interact with the materials inside. Thus, the interaction between material and light within microcavity is greatly changed comparing with the condition of free space. To obtain white light in MOLED, a multimode within the emission spectrum of the wide-band emitter is essential, and can be realized by charging cavity length. However, for the white MOLED with multiple layer structure, the EL performances were seldom reported. We report the realization of a bright white MOLED with a simple two-layer structure and only one emitter layer.An microcavity organic light-emitting diode (MOLED) was developed to emit white light. The MOLED was designed and fabricated with a simple structure of glass/DBR/ITO(194 nm)/NPB(93 nm)/Alq3(49 nm)/MgAg(150 nm). White light was observed based to the emission of two cavity modes despite only one emitter layer. By well adjusting the resonance wavelength (488 and 612 nm) and intensity, the two cavity modes give rise to a bright, white electroluminescene emission with a maximum luminance of 16 435 cd/m2, maximum luminous efficiency of 11.1 cd/A. At the typical luminance of 100 cd/m2, the luminous efficiency, voltage and current density are 9 cd/A, 6 V and 1.2 mA/cm2 for the MOLED device,respectively. The MOLED has a CIE chromaticity coordinate of (0.32, 0.34), which is very stable under different applied voltage. The result indicated that microcavity is an efficient structure to construct white OLED.
Keywords:organic light-emitting device                  microcavity                  white light                  cavity mode
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