Enhancement of electron injection in polymer light-emitting diodes with a supramolecular insulating nanolayer on the bottom cathode

Jeong Ho Cho; Hwa Sung Lee; Yunseok Jang; Yongkyun Lee; Soon Kab Kwon; Jin Jang; Kilwon Cho

doi:10.1063/1.2338534

Enhancement of electron injection in polymer light-emitting diodes with a supramolecular insulating nanolayer on the bottom cathode

Jeong Ho Cho, Hwa Sung Lee, Yunseok Jang, Yongkyun Lee, Soon Kab Kwon, Jin Jang, Kilwon Cho

Department of Chemical and Biomolecular Engineering

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

5 Citations (Scopus)

Abstract

With the aim of enhancing the electron injection of a polymer light-emitting diode (PLED), a supramolecular insulating nanolayer that reacts with the cathode (Ag) was inserted between the bottom cathode and the emitting material. The PLED threshold voltage (for 1 cd/m²) was found to decrease from 5.6 to 4.2 V as a result of the introduction of the nanolayer. Synchrotron radiation photoelectron spectroscopy results show that inserting the supramolecular insulating nanolayer results in a decrease in the work function of about 0.7 eV. This reduction lowers the electron injection barrier and produces an increase in the luminance.

Original language	English
Article number	083508
Journal	Applied Physics Letters
Volume	89
Issue number	8
DOIs	https://doi.org/10.1063/1.2338534
Publication status	Published - 2006

Bibliographical note

Funding Information:
The authors thank the Center for Nanostructural Materials Technology under the 21st Century Frontier R&D Programs (05K1501-01010), the National Research Laboratory Program of the Ministry of Science and Technology of Korea, and the BK21 Program of the Ministry of Education of Korea for their financial support and the Pohang Accelerator Laboratory for providing the 4B1 beam line used in this study.

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.2338534

Cite this

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title = "Enhancement of electron injection in polymer light-emitting diodes with a supramolecular insulating nanolayer on the bottom cathode",

abstract = "With the aim of enhancing the electron injection of a polymer light-emitting diode (PLED), a supramolecular insulating nanolayer that reacts with the cathode (Ag) was inserted between the bottom cathode and the emitting material. The PLED threshold voltage (for 1 cd/m2) was found to decrease from 5.6 to 4.2 V as a result of the introduction of the nanolayer. Synchrotron radiation photoelectron spectroscopy results show that inserting the supramolecular insulating nanolayer results in a decrease in the work function of about 0.7 eV. This reduction lowers the electron injection barrier and produces an increase in the luminance.",

author = "Cho, {Jeong Ho} and Lee, {Hwa Sung} and Yunseok Jang and Yongkyun Lee and Kwon, {Soon Kab} and Jin Jang and Kilwon Cho",

note = "Funding Information: The authors thank the Center for Nanostructural Materials Technology under the 21st Century Frontier R&D Programs (05K1501-01010), the National Research Laboratory Program of the Ministry of Science and Technology of Korea, and the BK21 Program of the Ministry of Education of Korea for their financial support and the Pohang Accelerator Laboratory for providing the 4B1 beam line used in this study.",

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AU - Cho, Jeong Ho

AU - Lee, Hwa Sung

AU - Jang, Yunseok

AU - Lee, Yongkyun

AU - Kwon, Soon Kab

AU - Jang, Jin

AU - Cho, Kilwon

N1 - Funding Information: The authors thank the Center for Nanostructural Materials Technology under the 21st Century Frontier R&D Programs (05K1501-01010), the National Research Laboratory Program of the Ministry of Science and Technology of Korea, and the BK21 Program of the Ministry of Education of Korea for their financial support and the Pohang Accelerator Laboratory for providing the 4B1 beam line used in this study.

PY - 2006

Y1 - 2006

N2 - With the aim of enhancing the electron injection of a polymer light-emitting diode (PLED), a supramolecular insulating nanolayer that reacts with the cathode (Ag) was inserted between the bottom cathode and the emitting material. The PLED threshold voltage (for 1 cd/m2) was found to decrease from 5.6 to 4.2 V as a result of the introduction of the nanolayer. Synchrotron radiation photoelectron spectroscopy results show that inserting the supramolecular insulating nanolayer results in a decrease in the work function of about 0.7 eV. This reduction lowers the electron injection barrier and produces an increase in the luminance.

AB - With the aim of enhancing the electron injection of a polymer light-emitting diode (PLED), a supramolecular insulating nanolayer that reacts with the cathode (Ag) was inserted between the bottom cathode and the emitting material. The PLED threshold voltage (for 1 cd/m2) was found to decrease from 5.6 to 4.2 V as a result of the introduction of the nanolayer. Synchrotron radiation photoelectron spectroscopy results show that inserting the supramolecular insulating nanolayer results in a decrease in the work function of about 0.7 eV. This reduction lowers the electron injection barrier and produces an increase in the luminance.

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Enhancement of electron injection in polymer light-emitting diodes with a supramolecular insulating nanolayer on the bottom cathode

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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