Enhancement of electron injection in polymer light-emitting diodes with a supramolecular insulating nanolayer on the bottom cathode

Jeong Ho Cho, Hwa Sung Lee, Yunseok Jang, Yongkyun Lee, Soon Kab Kwon, Jin Jang, Kilwon Cho

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

With the aim of enhancing the electron injection of a polymer light-emitting diode (PLED), a supramolecular insulating nanolayer that reacts with the cathode (Ag) was inserted between the bottom cathode and the emitting material. The PLED threshold voltage (for 1 cd/m2) was found to decrease from 5.6 to 4.2 V as a result of the introduction of the nanolayer. Synchrotron radiation photoelectron spectroscopy results show that inserting the supramolecular insulating nanolayer results in a decrease in the work function of about 0.7 eV. This reduction lowers the electron injection barrier and produces an increase in the luminance.

Original languageEnglish
Article number083508
JournalApplied Physics Letters
Volume89
Issue number8
DOIs
Publication statusPublished - 2006

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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