Enhancing the electroluminescent properties of organic light-emitting devices using a thin NaCl layer

S. J. Kang, D. S. Park, S. Y. Kim, C. N. Whang, K. Jeong, S. Im

Research output: Contribution to journalArticle

86 Citations (Scopus)

Abstract

We report on the fabrication of organic light-emitting devices (OLEDs) using a thin NaCl interlayer as an electron-injection medium. The results show that the device containing the NaCl layer has a higher brightness and electroluminescent efficiency than the device without this layer. We also fabricated similar-structured comparable devices, which were prepared with a LiF layer as a different electron-injection medium. The maximum electroluminescent efficiency of the NaCl (1 nm)/Al cathode device was 2.85 cd/A, which is higher than the 2.25 cd/A of the LiF (1 nm)/Al cathode device. The ultrathin NaCl layer modified the carrier injection properties. In conclusion, the NaCl layer between a cathode and an emitting layer of OLEDs can be used as the carrier injection layer to improve the EL properties.

Original languageEnglish
Pages (from-to)2581-2583
Number of pages3
JournalApplied Physics Letters
Volume81
Issue number14
DOIs
Publication statusPublished - 2002 Sep 30

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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