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Browse Journals & Magazines > Applied Physics Letters ...> Volume:99 Issue:16 Help

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

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10 Author(s)
Sun Park, Ji ; Department of Materials Science and Engineering, KAIST, Daejeon 305-701, South Korea ; Ram Lee, Bo ; Jeong, Eunjae ; Lee, Hyun-Jung
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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, HfO2/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).

Published in:
Applied Physics Letters  (Volume:99 ,  Issue: 16 )

Date of Publication: Oct 2011

Page(s):
163305 - 163305-3
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.3653962
Date of Current Version :
12 December 2011
Issue Date :
Oct 2011

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