Mechanisms of injection enhancement in organic light-emitting diodes through insulating buffer

作者：Zhao JM; Zhan YQ; Zhang ST; Wang XJ; Zhou YC; Wu Y; Wang ZJ; Ding XM; Hou XY^*

来源：Applied Physics Letters, 2004, 84(26): 5377-5379.

DOI：10.1063/1.1764943

Three types of organic light-emitting diodes are fabricated. Tris-8-hydroxyquinoline aluminum (Alq(3)) is used as an electron-transporting layer (ETL) and sodium stearate (NaSt) as an electron-injecting buffer. The optimal thickness of NaSt for electron injection is different for cathodes of different metals, such as Mg, Al, and Ag. This is attributed to the different work functions of cathodes, which result in different initial barrier heights for electron injection from cathodes into ETL, and explained based on tunneling theory.

• 出版日期2004-6-28
• 单位复旦大学