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Organic light-emitting diode with liquid emitting layer
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FIG. 1.

(a) Chemical structure of EHCz and rubrene molecules. (b) Cross-sectional schematic view of device. (c) Device fabrication procedure.

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FIG. 2.

(a) and (b) EQE- characteristics. Inset: proposed mechanism of device operation.

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FIG. 3.

(a) Normalized EL spectra at 20, 30, and 40 V. (b) Normalized PL spectra of EHCz and EHCz:rubrene (1 wt %) liquid layers and absorption spectra of rubrene in and EHCz in . EHCz and EHCz:rubrene (1 wt %) were excited at 340 nm.

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/content/aip/journal/apl/95/5/10.1063/1.3200947
2009-08-06
2014-04-24

Abstract

We demonstrate an original organic light-emitting diode(OLED) having a neat liquid host of 9-(2-ethylhexyl)carbazole (EHCz) doped with a guest emitter of 5,6,11,12-tetraphenylnapthacene (rubrene). The device structure is composed of indium tin-oxide (ITO)/poly(3,4-ethylenedioxythiophene):poly(styrenesulphonate)/EHCz:rubrene//ITO. We demonstrate that the liquid organic semiconducting layer surely transports charge carriers, leading to electroluminescence from rubrene with the highest external quantum efficiency of at a current density of . Our demonstration of the liquid-OLEDs will open another possibility of organic semiconductors and light-emitting applications.

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Scitation: Organic light-emitting diode with liquid emitting layer
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/5/10.1063/1.3200947
10.1063/1.3200947
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