High driving voltage, low power efficiency, and insufficient device stability are the most critical complications for organic light-emitting diodes (OLEDs) on their way to practical applications. Particularly in the case of active-matrix organic light emitting device (AMOLED) displays, inferior electron injection from commonly-used ITO electrodes is a critical issue. In this work, 2-Methyl-9,10-bis(naphthalen-2-yl)anthracene doped rubidium carbonate (MADN:Li 2 CO 3 ) is used as an effective electron injecting layer for both inverted and normal bottom-emission organic light-emitting diodes. When the concentration of Li 2 CO 3 -doped MADN is optimized, the device exhibits improved characteristics, including improvements in turn-on voltage, luminance, and efficiency. Ultraviolet photoelectron spectroscopy (UPS) and X-ray photoelectron spectroscopy (XPS) analyses reveal an energy level shift in MADN:Li 2 CO 3 , which indicates th...

中文翻译：

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2-甲基-9,10-双（萘-2-基）蒽掺杂的碳酸锂作为反相和常规有机发光二极管结构的有效电子注入层

高驱动电压，低功率效率和不足的器件稳定性是有机发光二极管（OLED）走向实际应用的最关键并发症。特别是在有源矩阵有机发光器件（AMOLED）显示器的情况下，来自常用ITO电极的电子注入不良是一个关键问题。在这项工作中，使用2-甲基-9,10-双（萘-2-基）蒽掺杂的碳酸rub（MADN：Li 2 CO 3）作为有效的电子注入层，用于反向和正常底部发射有机光发光二极管。当优化掺杂Li 2 CO 3的MADN的浓度时，该器件显示出改善的特性，包括导通电压，亮度和效率的提高。