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研制了用有机材料Tb(AcA)3·phen做发射层的绿色发光二极管,二层结构为玻璃衬底ITO/芳香族二胺类衍生物TPD/Tb(AcA)3·phen/Al.各功能层均用真空热蒸发的方法制备.在正向直流偏压驱动下获得了Tb(3+)的特征发光,同时还发现一个峰位425nm的蓝光发射,它来源于空穴输运层TPD.在室温条件下器件的阈值电压为5V,当驱动电压提高到15V时,器件的最高发光亮度达到200cd/m2.讨论了器件的有机电致发光与各功能层膜厚及驱动电压的关系,同时发现有机材料Tb(AcA)3·phen能够传输电子.探讨了有关稀土有机电致发光的发光机理等.
A green light-emitting diode with an organic material Tb (AcA) 3 · phen as an emitting layer was developed. The two-layer structure was a glass substrate ITO / aromatic diamine derivative TPD / Tb (AcA) 3 · phen / Al. Each functional layer is prepared by vacuum thermal evaporation. The Tb (3+) emission was obtained under the forward DC voltage bias, and a blue emission at 425nm was also found, which is derived from the hole transport layer TPD. The threshold voltage of the device is 5V at room temperature. When the driving voltage is raised to 15V, the maximum luminance of the device reaches 200 cd / m2. The relationship between the organic electroluminescence and the thickness and driving voltage of each functional layer was discussed. At the same time, the organic material Tb (AcA) 3 · phen was able to transport electrons. The mechanism of luminescence of rare earth organic electroluminescence was discussed.