한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
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Charge Balance in High Efficiency Blue Phosphorescent Organic Light Emitting Diodes

  • Chopra, Neetu (Departement of Materials Science and Engineering, University of Florida) ;
  • Lee, Jae-Won (Departement of Materials Science and Engineering, University of Florida) ;
  • So, Franky (Departement of Materials Science and Engineering, University of Florida)
  • Published : 2009.10.12
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Abstract

In this paper, we study effect of charge balance on performance of blue phosphorescent organic light emitting diodes (OLEDs). Charge balance determines the location of recombination zone in the OLEDs. By tuning the charge balance in iridium (III) bis[(4,6-difluorophenyl)-pyridinate-N,C2']picolinate (FIrpic) based blue phosphorescent organic light-emitting devices (PHOLEDs) with a high mobility and high triplet energy electron transporting material, we were able to achieve a high current efficiency of 60 cd/A which is a 3X improvement over previous devices with 3,5'-N,N'-dicarbazole-benzene (mCP) host.

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