Organic light-emitting diode with liquid emitting layer

Denghui Xu; Chihaya Adachi

doi:10.1063/1.3200947

Organic light-emitting diode with liquid emitting layer

Denghui Xu, Chihaya Adachi

Applied Chemistry

Research output: Contribution to journal › Article › peer-review

77 Citations (Scopus)

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/ Cs₂ CO₃ /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 η_ext =0.03% at a current density of 0.26 mA/cm². Our demonstration of the liquid-OLEDs will open another possibility of organic semiconductors and light-emitting applications.

Original language	English
Article number	053304
Journal	Applied Physics Letters
Volume	95
Issue number	5
DOIs	https://doi.org/10.1063/1.3200947
Publication status	Published - Aug 14 2009

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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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/ Cs2 CO3 /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 ηext =0.03% at a current density of 0.26 mA/cm2. Our demonstration of the liquid-OLEDs will open another possibility of organic semiconductors and light-emitting applications.",

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