Pyromellitic dianhydride as a cathode interfacial layer in the organic light emitting diodes: thickness optimization and its electroluminescent characteristics

  • Nam, Eun-Kyoung (Department of Physics, Institute of Basic Science, Brain Korea 21 Physics Research Division, Sungkyunkwan University) ;
  • Moon, Mi-Ran (Department of Physics, Institute of Basic Science, Brain Korea 21 Physics Research Division, Sungkyunkwan University) ;
  • Son, Dong-Jin (Department of Physics, Institute of Basic Science, Brain Korea 21 Physics Research Division, Sungkyunkwan University) ;
  • Park, Keun-Hee (Department of Physics, Institute of Basic Science, Brain Korea 21 Physics Research Division, Sungkyunkwan University) ;
  • Jung, Dong-Geun (Department of Physics, Institute of Basic Science, Brain Korea 21 Physics Research Division, Sungkyunkwan University) ;
  • Kim, Hyoung-Sub (School of Advanced Materials Science and Engineering, Sungkyunkwan University)
  • Published : 2009.10.12

Abstract

In this work, pyromellitic dianhydride (PMDA) was used as a cathode interfacial layer in the organic light emitting diodes (OLEDs) and its thickness was optimized. Various electrical and optical characterizations of the OLEDs having various thicknesses of the PMDA cathode interfacial layer revealed that the best OLED performance could be achieved by using 0.5 nm-thick PMDA layer compared to the control device without any interfacial layer.

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