Highly efficient and bright organic electroluminescent devices with an aluminum cathode
Highly efficient and bright organic electroluminescent devices with an aluminum cathode
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DOI：
10.1063/1.119392
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发表时间：
1997-09-29
影响因子：
4
通讯作者：
Peyghambarian, N
中科院分区：
文献类型：
--
作者：
Jabbour, GE;Kawabe, Y;Peyghambarian, N
电子注入过程限制了有机器件的电致发光性能，通过在阴极和喹吖啶酮掺杂的有机层之间插入适当厚度的LiF层，极大地提高了器件的发光性能。Al/LiF阴极器件的亮度超过20000 cd/m(2)，外量子效率为3%。这可与具有镁/LiF阴极的器件相媲美。在连续偏置操作失败之前，这些器件的最大亮度为45000 cd/m(2)。对于相同的LiF厚度，含Al/LiF的器件的工作电压低于含Mg/LiF或仅含镁的器件的相应工作电压。用隧道理论解释了这种增强现象。(C)1997年美国物理研究所。
The electron injection process, which limits the electroluminescent performance of organic devices, has been enhanced tremendously by inserting a layer of LiF with appropriate thickness between the cathode and a quinacridone doped organic layer, Devices with an Al/LiF cathode demonstrated a luminance in excess of 20000 cd/m(2) and an external quantum efficiency of 3%. which is comparable to devices with a Mg/LiF cathode. These devices show maximum luminance of 45 000 cd/m(2) prior to failure in continuous bias operation. For the same LiF thickness, the operating voltage for devices with Al/LiF was lower than the corresponding operating voltage for devices with Mg/LiF or Mg alone. Tunneling theory is used to explain this enhancement. (C) 1997 American Institute of Physics.