Color-stable, ITO-free white organic light-emitting diodes with enhanced efficiency using solution-processed transparent electrodes and optical outcoupling layers

Hong-Wei Chang; Yong Hyun Kim; Jonghee Lee; Simone Hofmann; Bjoern Luessem; Lars Mueller-Meskamp; Malte C. Gather; Karl Leo; Chung-Chih Wu

doi:10.1016/j.orgel.2014.02.017

Color-stable, ITO-free white organic light-emitting diodes with enhanced efficiency using solution-processed transparent electrodes and optical outcoupling layers

Hong-Wei Chang, Yong Hyun Kim, Jonghee Lee, Simone Hofmann, Bjoern Luessem, Lars Mueller-Meskamp, Malte C. Gather, Karl Leo, Chung-Chih Wu^*

^*Corresponding author for this work

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

Abstract

In this work, we demonstrate color-stable, ITO-free white organic light-emitting diodes (WOLEDs) with enhanced efficiencies by combining the high-conductivity conducting polymer PEDOT:PSS as transparent electrode and a nanoparticle-based scattering layer (NPSL) as the effective optical out-coupling layer. In addition to efficiency enhancement, the NPSL is also beneficial to the stabilization of electroluminescent spectra/colors over viewing angles. Both the PEDOT:PSS and the NPSL can be fabricated by simple, low-temperature solution processing. The integration of both solution-processable transparent electrodes and light extraction structures into OLEDs is particularly attractive for applications since they simultaneously provide manufacturing, cost and efficiency advantages.

Original language	English
Pages (from-to)	1028-1034
Number of pages	7
Journal	Organic Electronics
Volume	15
Issue number	5
Early online date	5 Mar 2014
DOIs	https://doi.org/10.1016/j.orgel.2014.02.017
Publication status	Published - May 2014

Keywords

OLEDs
Transparent electrode
Conducting polymer
Optical outcoupling
Indium tin oxide
Conductive polymer anodes
Work function
Photoelectron-spectroscopy
Devices
Cells
Films
Stability

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10.1016/j.orgel.2014.02.017

ITO-free OLED with scattering layer (2014-2-8 revised)
© 2014. Elsevier Inc. All rights reserved. This is the author’s version of a work that was accepted for publication in Organic Electronics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Organic Electronics, 15, 5, May 2014 DOI http://dx.doi.org/10.1016/j.orgel.2014.02.017
Accepted author manuscript, 321 KB

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Chang, H.-W., Kim, Y. H., Lee, J., Hofmann, S., Luessem, B., Mueller-Meskamp, L., Gather, M. C., Leo, K., & Wu, C.-C. (2014). Color-stable, ITO-free white organic light-emitting diodes with enhanced efficiency using solution-processed transparent electrodes and optical outcoupling layers. Organic Electronics, 15(5), 1028-1034. https://doi.org/10.1016/j.orgel.2014.02.017

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title = "Color-stable, ITO-free white organic light-emitting diodes with enhanced efficiency using solution-processed transparent electrodes and optical outcoupling layers",

abstract = "In this work, we demonstrate color-stable, ITO-free white organic light-emitting diodes (WOLEDs) with enhanced efficiencies by combining the high-conductivity conducting polymer PEDOT:PSS as transparent electrode and a nanoparticle-based scattering layer (NPSL) as the effective optical out-coupling layer. In addition to efficiency enhancement, the NPSL is also beneficial to the stabilization of electroluminescent spectra/colors over viewing angles. Both the PEDOT:PSS and the NPSL can be fabricated by simple, low-temperature solution processing. The integration of both solution-processable transparent electrodes and light extraction structures into OLEDs is particularly attractive for applications since they simultaneously provide manufacturing, cost and efficiency advantages. ",

keywords = "OLEDs, Transparent electrode, Conducting polymer, Optical outcoupling, Indium tin oxide, Conductive polymer anodes, Work function, Photoelectron-spectroscopy, Devices, Cells, Films, Stability",

author = "Hong-Wei Chang and Kim, \{Yong Hyun\} and Jonghee Lee and Simone Hofmann and Bjoern Luessem and Lars Mueller-Meskamp and Gather, \{Malte C.\} and Karl Leo and Chung-Chih Wu",

year = "2014",

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doi = "10.1016/j.orgel.2014.02.017",

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AU - Chang, Hong-Wei

AU - Kim, Yong Hyun

AU - Lee, Jonghee

AU - Hofmann, Simone

AU - Luessem, Bjoern

AU - Mueller-Meskamp, Lars

AU - Gather, Malte C.

AU - Leo, Karl

AU - Wu, Chung-Chih

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N2 - In this work, we demonstrate color-stable, ITO-free white organic light-emitting diodes (WOLEDs) with enhanced efficiencies by combining the high-conductivity conducting polymer PEDOT:PSS as transparent electrode and a nanoparticle-based scattering layer (NPSL) as the effective optical out-coupling layer. In addition to efficiency enhancement, the NPSL is also beneficial to the stabilization of electroluminescent spectra/colors over viewing angles. Both the PEDOT:PSS and the NPSL can be fabricated by simple, low-temperature solution processing. The integration of both solution-processable transparent electrodes and light extraction structures into OLEDs is particularly attractive for applications since they simultaneously provide manufacturing, cost and efficiency advantages.

AB - In this work, we demonstrate color-stable, ITO-free white organic light-emitting diodes (WOLEDs) with enhanced efficiencies by combining the high-conductivity conducting polymer PEDOT:PSS as transparent electrode and a nanoparticle-based scattering layer (NPSL) as the effective optical out-coupling layer. In addition to efficiency enhancement, the NPSL is also beneficial to the stabilization of electroluminescent spectra/colors over viewing angles. Both the PEDOT:PSS and the NPSL can be fabricated by simple, low-temperature solution processing. The integration of both solution-processable transparent electrodes and light extraction structures into OLEDs is particularly attractive for applications since they simultaneously provide manufacturing, cost and efficiency advantages.

KW - OLEDs

KW - Transparent electrode

KW - Conducting polymer

KW - Optical outcoupling

KW - Indium tin oxide

KW - Conductive polymer anodes

KW - Work function

KW - Photoelectron-spectroscopy

KW - Devices

KW - Cells

KW - Films

KW - Stability

UR - https://www.scopus.com/pages/publications/84896346147

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DO - 10.1016/j.orgel.2014.02.017

M3 - Article

SN - 1566-1199

VL - 15

SP - 1028

EP - 1034

JO - Organic Electronics

JF - Organic Electronics

IS - 5

ER -

Color-stable, ITO-free white organic light-emitting diodes with enhanced efficiency using solution-processed transparent electrodes and optical outcoupling layers

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Keywords

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