有机发光器件(OLED)中的界面研究

Organic Light Emitting Device ( OLED) Interface Research

有机电致发光器件由于其成本低、重量轻、低阈值电压、高亮度、无需背光源而自身发光、宽视角并易于加工等优点成为现代平板显示的研究热点。经过了二十余年的发展,OLED的器件性能得到大幅度改善。然而,距离实用化还有一定差距,如发光效率低以及器件寿命短等问题,成为制约其推广应用的技术瓶颈。OLED的器件性能在很大程度上由其器件中的界面结构所决定。简要介绍OLED中的界面研究进展,围绕金属/有机界面、有机/有机界面、阳极/有机界面以及层内部材料界面展开叙述,讨论界面结构与OLED器件性能之间的关系,并以多种技术手段和方法研究OLED界面分子结构、能带结构、激发态特性及反应等获得的主要结果,在此基础上预测OLED界面研究的发展趋势。

Organic light emitting device （OLED） have been modem flat-panel display research hotspot due to its low cost, lightweight, low threshold voltage, high brightness, no back light source and luminous, wide viewing angle and mechanical flexibility. After 20 years of development, device performance of organic light emitting device （0LED） has been greatly improved. However, OLED can＇t be utilized widely for its rather poor performance, such as low luminous efficiency and short life-time. Device performance of OLED is influenced largely by the device interface structure. In the present paper, we focused on research progress of metal/organic interface, the organic/organic interface anode/organic interface and the layer of internal material interface in OLED, discussed the relationship between the interface structures and OLED device performance, and the recent research results by a variety of analytical techniques and methods about the interfacial issues of OLED, such as interfacial molecular structure, energy band, characteristics of excited state and reaction. Finally, OLED interface research trends were mentioned.