Designing an electron-transport layer for highly efficient, reliable, and solution-processed organic light-emitting diodes

Jin Hoon Kim, jin woo Park

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We present solution-processable electron-transport layers (ETL) with highly enhanced electron-injection and electron-transport properties and resistance to oxygen and moisture for solution-processed organic light-emitting diodes (OLEDs). We selected polyethyleneimine ethoxylated (PEIE) as the ETL and Cs2CO3, CsF, and tris(8-hydroxyquinolinato)aluminum (Alq3) as n-type dopants. Compared with OLEDs with undoped PEIE as the ETL, the OLEDs with doped PEIE (d-PEIE) showed significantly improved luminance, efficiency, and lifetimes. These improvements are attributed to d-PEIE decreasing the work function of the Al metal cathode, as shown by ultraviolet photoelectron spectroscopy (UPS) analysis, and improving the gas and moisture resistance.

Original languageEnglish
Pages (from-to)3097-3106
Number of pages10
JournalJournal of Materials Chemistry C
Issue number12
Publication statusPublished - 2017 Jan 1


All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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