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

Jin Hoon Kim, jin woo Park

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

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
Volume5
Issue number12
DOIs
Publication statusPublished - 2017 Jan 1

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Polyethyleneimine
Organic light emitting diodes (OLED)
Moisture
Ultraviolet photoelectron spectroscopy
Electron transport properties
Electron injection
Aluminum
Luminance
Cathodes
Gases
Metals
Doping (additives)
Oxygen
Electron Transport

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

Cite this

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abstract = "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.",
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Designing an electron-transport layer for highly efficient, reliable, and solution-processed organic light-emitting diodes. / Kim, Jin Hoon; Park, jin woo.

In: Journal of Materials Chemistry C, Vol. 5, No. 12, 01.01.2017, p. 3097-3106.

Research output: Contribution to journalArticle

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