한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
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Enhanced efficiency of organic light-emitting diodes by doping the electrontransport layer

  • Lee, Hyun-Koo (Dept. of Electrical Engineering and Computer Science, Seoul National University) ;
  • Kwon, Do-Sung (Dept. of Electrical Engineering and Computer Science, Seoul National University) ;
  • Lee, Chang-Hee (Dept. of Electrical Engineering and Computer Science, Seoul National University)
  • Published : 2005.07.19
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Abstract

We present that the electroluminescence (EL) efficiency can be improved by doping an electron transport layer (ETL) with organic materials which can make electron current increase. The electron transport layer of aluminum tris(8 -hydroxyquinoline) (Alq3) is doped with 2-(4-Biphenylyl)-5-(4-tertbutylphenyl)- 1,3,4-oxadiazole) (butyl-PBD) to enhance the electron mobility of the ETL. The higher quantum efficiency of device having ETL using Alq3 doped with butyl-PBD can be attributed to the improved electron and hole balance.

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