High-current injection and transport on order of kA/cm2 in organic light-emitting diodes having mixed organic/organic heterojunction interfaces

Toshinori Matsushima; Chihaya Adachi

doi:10.1143/JJAP.46.L861

High-current injection and transport on order of kA/cm² in organic light-emitting diodes having mixed organic/organic heterojunction interfaces

Toshinori Matsushima, Chihaya Adachi

Applied Chemistry

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

25 Citations (Scopus)

Abstract

We manufactured multilayer organic light-emitting diodes (OLEDs) with mixed organic/organic heterojunction interfaces composed of alpha-sexithiophene and phenyldipyrenylphosphine oxide carrier-transporting layers. In the mixed-interface OLEDs, we achieved a low driving voltage of 3.6V at a current flow of 100mA/cm², which was caused by efficient carrier injection at the mixed interfaces. We investigated how much current can flow through these OLEDs with the aim of fabricating electrically pumped organic laser diodes. We found that an OLED of this type with a small active area of 625 μm ² on a high-thermal-conductivity sapphire substrate can sustain high current densities of 1.1 kA/cm² and emits bright electroluminescence of 7.9 Mcd/m² under direct current.

Original language	English
Pages (from-to)	L861-L863
Journal	Japanese Journal of Applied Physics, Part 2: Letters
Volume	46
Issue number	33-35
DOIs	https://doi.org/10.1143/JJAP.46.L861
Publication status	Published - Sept 7 2007

All Science Journal Classification (ASJC) codes

Engineering(all)
Physics and Astronomy (miscellaneous)
Physics and Astronomy(all)

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10.1143/JJAP.46.L861

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title = "High-current injection and transport on order of kA/cm2 in organic light-emitting diodes having mixed organic/organic heterojunction interfaces",

abstract = "We manufactured multilayer organic light-emitting diodes (OLEDs) with mixed organic/organic heterojunction interfaces composed of alpha-sexithiophene and phenyldipyrenylphosphine oxide carrier-transporting layers. In the mixed-interface OLEDs, we achieved a low driving voltage of 3.6V at a current flow of 100mA/cm2, which was caused by efficient carrier injection at the mixed interfaces. We investigated how much current can flow through these OLEDs with the aim of fabricating electrically pumped organic laser diodes. We found that an OLED of this type with a small active area of 625 μm 2 on a high-thermal-conductivity sapphire substrate can sustain high current densities of 1.1 kA/cm2 and emits bright electroluminescence of 7.9 Mcd/m2 under direct current.",

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AU - Adachi, Chihaya

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AB - We manufactured multilayer organic light-emitting diodes (OLEDs) with mixed organic/organic heterojunction interfaces composed of alpha-sexithiophene and phenyldipyrenylphosphine oxide carrier-transporting layers. In the mixed-interface OLEDs, we achieved a low driving voltage of 3.6V at a current flow of 100mA/cm2, which was caused by efficient carrier injection at the mixed interfaces. We investigated how much current can flow through these OLEDs with the aim of fabricating electrically pumped organic laser diodes. We found that an OLED of this type with a small active area of 625 μm 2 on a high-thermal-conductivity sapphire substrate can sustain high current densities of 1.1 kA/cm2 and emits bright electroluminescence of 7.9 Mcd/m2 under direct current.

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High-current injection and transport on order of kA/cm² in organic light-emitting diodes having mixed organic/organic heterojunction interfaces

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