Electrical properties of organic electroluminescent devices with aluminium alloy cathode

Naka, Shigeki; Tamekawa, Mitsugu; Terashita, Toshiaki; Okada, Hiroyuki; Anada, Hiroshi; Onnagawa, Hiroyoshi

doi:10.1016/s0379-6779(98)80072-6

Cited by 47 publications

(30 citation statements)

References 4 publications

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“…Here, by introducing Cs into the cathode, the tunneling injection current is enhanced due to the formation of a Cs 2 O layer at the organic layer/ cathode interface, because Cs is instantaneously oxidized and a reduction of the effective electron-injection barrier occurs. 20,21) Therefore, a similar improvement of the characteristics will be expected for other device structures. Figures 9 and 10 show comparisons of the CIE chromaticity coordinates and EL spectra for Type 4 devices with different cathodes.…”

Section: Characteristics Of Devices Doped With Perylene and Dcjtbmentioning

confidence: 58%

White Organic Electroluminescent Devices Fabricated Using Ink-Jet Printing Method

Satoh

Naka

Miki

et al. 2004

Jpn. J. Appl. Phys.

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Section: Characteristics Of Devices Doped With Perylene and Dcjtbmentioning

confidence: 58%

White Organic Electroluminescent Devices Fabricated Using Ink-Jet Printing Method

Satoh

Naka

Miki

et al. 2004

Jpn. J. Appl. Phys.

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“…4(a) and 4(b) shows the temperature dependence of I D -V D curves. In general, there are two possible injection mechanisms for the interface of metal/organic layer, i.e., Schottky thermionic emission [25][26] and tunneling [27]. As the I D -V D characteristics show strong temperature dependence in both the devices therefore the carrier-injection is explained by thermionic (Schottky) emission mechanisms.…”

Section: Resultsmentioning

confidence: 99%

Top Contact Pentacene Based Organic Thin Film Transistor With Bi-layer TiO2Electrodes

Alam

Wang

Naka

et al. 2012

J. Photopol. Sci. Technol.

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We fabricated a Top contact Pentacene based Organic thin-film transistor (OTFTs) with bi-layer TiO 2 /Au electrodes. The performance of the devices after inserting TiO 2 layer between organic layer and Au electrode is highly improved. On comparing with pentacene based transistor with only Au electrode, the hole injection was largely enhanced and the highest field-effect mobility is increased from 0.37 cm 2 / (Vs) to 0.63 cm 2 / (Vs) in the device with bilayer TiO 2 /Au electrodes. We also measured the temperature dependence characteristics and surface morphology of both the devices. Both the devices showed strong temperature dependence. We observed that the barrier height is tremendously decreased after inserting a thin layer of TiO 2 between the organic layer and Au electrodes. The improved device performance was due to the decreased barrier height and decrease in the surface roughness of pentacene after inserting a suitable metal oxide layer between the pentacene and the Au electrodes. Our experimental results clearly show that the insertion of metal oxide between Au electrode and pentacene layer is an effective way to improve the performance of the pentacene based organic thin-film transistor (OTFTs).

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“…Al is quite a stable metal, but the relatively high work function makes it difficult to inject electrons to the LUMO of most electron transport materials (ETM). Naka et al [28] systematically investigated the influence of doping Al with various metals (Li, Ca, and Mg). They found that the lower the work function of the doped metal, the less the injection Schottky barrier.…”

Section: Cathode and Electron Injection Materialsmentioning

confidence: 99%

Organic Semiconductor Electroluminescent Materials

2015

Lecture Notes in Chemistry

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This chapter reviews the important progress made on small molecule electroluminescent materials used in organic light-emitting diode (OLED). In many cases we describe not only the material structures but also the properties associated with these materials, such as energy level, absorption and photoluminescence (PL) peaks, PL quantum yield, exciton life time, and so on. The performances of related devices are covered as well if they are available.

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Electrical properties of organic electroluminescent devices with aluminium alloy cathode

Cited by 47 publications

References 4 publications

White Organic Electroluminescent Devices Fabricated Using Ink-Jet Printing Method

White Organic Electroluminescent Devices Fabricated Using Ink-Jet Printing Method

Top Contact Pentacene Based Organic Thin Film Transistor With Bi-layer TiO2Electrodes

Organic Semiconductor Electroluminescent Materials

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