High performance polymer light-emitting diodes with N-type metal oxide/conjugated polyelectrolyte hybrid charge transport layers

Ji Sun Park, Bo Ram Lee, Eunjae Jeong, Hyun Jung Lee, Ju Min Lee, Ji Seon Kim, Jin Young Kim, Han Young Woo, Sang Ouk Kim, Myoung Hoon Song

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26 Citations (Scopus)

Abstract

We present an interfacial engineering strategy employing n-type-metal-oxide/conjugated-polyelectrolyte (CPE) hybrid charge-transport layers for highly efficient polymer light-emitting diodes (PLEDs). The hybrid metal-oxide/CPE layer facilitates electron-injection, while blocking hole-transport, and thereby maximizes electron-hole recombination within the emitting layer. A series of metal-oxide/CPE combinations were tested in inverted PLEDs (FTO/metal-oxide/CPE/F8BT/MoO3/Au). Specifically, HfO 2/CPE double layer achieved an electroluminescence (EL) efficiency of up to 25.8 cd/A (@ 6.4 V, one of the highest values reported for fluorescent PLEDs).

Original languageEnglish
Article number163305
JournalApplied Physics Letters
Volume99
Issue number16
DOIs
Publication statusPublished - 2011 Oct 17

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Sun Park, J., Ram Lee, B., Jeong, E., Lee, H. J., Min Lee, J., Kim, J. S., Young Kim, J., Young Woo, H., Ouk Kim, S., & Hoon Song, M. (2011). High performance polymer light-emitting diodes with N-type metal oxide/conjugated polyelectrolyte hybrid charge transport layers. Applied Physics Letters, 99(16), [163305]. https://doi.org/10.1063/1.3653962