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Kim, Jin Young
Next Generation Energy Laboratory
Research Interests
  • Polymer solar cells, QD solar cells, organic-inorganic hybrid solar cells, perovskite solar cells, OLEDs, PeLEDs, organic FETs

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Improved electron injection in polymer light-emitting diodes using anionic conjugated polyelectrolyte

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Title
Improved electron injection in polymer light-emitting diodes using anionic conjugated polyelectrolyte
Author
Jin, YoungeupBazan, Guillermo C.Heeger, Alan J.Kim, Jin YoungLee, Kwanghee
Keywords
LIF/AL CATHODE; DEVICES; PERFORMANCE; EMISSION; BILAYER
Issue Date
200809
Publisher
AMER INST PHYSICS
Citation
APPLIED PHYSICS LETTERS, v.93, no.12, pp.1 - 3
Abstract
We report improved performance in polymer light-emitting diodes incorporating conjugated polyelectrolytes as an electron injection layer (EIL). When we introduce water soluble conjugated polymers, poly[9,9'-bis(4-sulfonatobutyl)fluorene-co-alt-1,4-phenylene] (anionic PFP), between the aluminum (Al) cathode and emissive layer, the devices show an increased electroluminescence efficiency with a lowered turn-on voltage. We believe the mobile Na(+) ions in the EIL layer directly influences the device efficiency by forming a low work function layer at the interface between the EIL and Al cathode, thereby facilitating the electron injection into the emissive layer.
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DOI
http://dx.doi.org/10.1063/1.2989133
ISSN
0003-6951
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ECHE_Journal Papers
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