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 language | English |
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Article number | 163305 |
Journal | Applied Physics Letters |
Volume | 99 |
Issue number | 16 |
DOIs | |
Publication status | Published - 2011 Oct 17 |
Externally published | Yes |
Bibliographical note
Funding Information:The authors thank Cambridge Display Technology (CDT), Ltd., for supplying F8BT. This work was supported by the Mid-career Researcher Program (2010-0027764), the National Research Laboratory Program (R0A-2008-000-20057-0), the World Class University (WCU) program (R32-2008-000-10051-0, R31-2008-000-20004-0), and the National Research Foundation of Korea (2010-0028791, 2009-0071834).
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)