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Issue 12, 2017
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Designing an electron-transport layer for highly efficient, reliable, and solution-processed organic light-emitting diodes

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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.

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

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Publication details

The article was received on 31 Jan 2017, accepted on 05 Mar 2017 and first published on 06 Mar 2017


Article type: Paper
DOI: 10.1039/C7TC00488E
Citation: J. Mater. Chem. C, 2017,5, 3097-3106
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    Designing an electron-transport layer for highly efficient, reliable, and solution-processed organic light-emitting diodes

    J. Kim and J. Park, J. Mater. Chem. C, 2017, 5, 3097
    DOI: 10.1039/C7TC00488E

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