中文摘要：

负电子亲和势材料具有较窄的禁带宽度、功函数低，在OLED的工作电场强范围内可以发射电子，同时在吸收有机材料所发光子能量后可以产生光电子发射，再次注入有机层，提高了电子注入效率。介绍了负电子亲和势材料的形成，理论上分析了其对有机半导体能级的影响以及如何改善有机电致发光器件中电子注入水平，从而提高发光效率。

英文摘要：

The negative electron affinity material has the narrow forbidden gap and lower work function. It can launch the electron in the OLED work electricity field intensity scope. Simultaneously, after the absorption of the photon energy from the organic material, it can also produce photoelectrons and pour them into the organic layer once more, thus it raise the electron injection efficiency. This paper introduces the negative electron affinity material＇s formation, and analyzes theoretically the influence of the NEA material on the organic semiconductor energy level as well as how it improves the organic electroluminescence device＇s injection level to raise the luminescence efficiency.