Solution-processed electron-only tandem polymer light-emitting diodes for broad wavelength light emission

Sung Hwan Cho, Eui Hyuk Kim, Beomjin Jeong, Ju Han Lee, Giyoung Song, Ihn Hwang, Himchan Cho, Kang Lib Kim, Seunggun Yu, Richard Hahnkee Kim, Seung Won Lee, Tae Woo Lee, Cheolmin Park

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Polymer light-emitting diodes (PLEDs) have been of great interest for flexible mobile displays and large area solid-state lighting due to the possibility of achieving low production costs using solution processes combined with various printing technologies. Although monochromatic operation of PLEDs with high luminous efficiency and device stability has been achieved using numerous strategies, the development of color-tunable PLEDs capable of emitting a broad range of light upon the application of external stimuli still remains challenging. Here, we present a solution-processed broad range color-tunable tandem PLED of inverted and regular light emitting units (LEUs) stacked in series sharing a floating polymer electrode as a charge injection layer between two LEUs. Fine and broad wavelength color control from pure blue to pure orange is achieved when an AC field is applied with different positive-to-negative polarity heights in our tandem PLED. Our AC-driven tandem PLEDs offer a facile route to color-tunable polymer EL devices with a maximum current efficiency (CE) and luminance of 2.5 cd A−1 and 1300 cd m−2 for blue emission under DC reverse and 6.7 cd A−1 and 6000 cd m−2 for orange emission under DC forward as well as 3.1 cd A−1 and 6000 cd m−2 for white emission under AC, respectively.

Original languageEnglish
Pages (from-to)110-117
Number of pages8
JournalJournal of Materials Chemistry C
Volume5
Issue number1
DOIs
Publication statusPublished - 2017 Jan 1

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Light emission
Light emitting diodes
Polymers
Wavelength
Electrons
Color
Charge injection
Printing
Luminance
Lighting
Display devices
Electrodes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

Cite this

Cho, Sung Hwan ; Kim, Eui Hyuk ; Jeong, Beomjin ; Lee, Ju Han ; Song, Giyoung ; Hwang, Ihn ; Cho, Himchan ; Kim, Kang Lib ; Yu, Seunggun ; Kim, Richard Hahnkee ; Lee, Seung Won ; Lee, Tae Woo ; Park, Cheolmin. / Solution-processed electron-only tandem polymer light-emitting diodes for broad wavelength light emission. In: Journal of Materials Chemistry C. 2017 ; Vol. 5, No. 1. pp. 110-117.
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abstract = "Polymer light-emitting diodes (PLEDs) have been of great interest for flexible mobile displays and large area solid-state lighting due to the possibility of achieving low production costs using solution processes combined with various printing technologies. Although monochromatic operation of PLEDs with high luminous efficiency and device stability has been achieved using numerous strategies, the development of color-tunable PLEDs capable of emitting a broad range of light upon the application of external stimuli still remains challenging. Here, we present a solution-processed broad range color-tunable tandem PLED of inverted and regular light emitting units (LEUs) stacked in series sharing a floating polymer electrode as a charge injection layer between two LEUs. Fine and broad wavelength color control from pure blue to pure orange is achieved when an AC field is applied with different positive-to-negative polarity heights in our tandem PLED. Our AC-driven tandem PLEDs offer a facile route to color-tunable polymer EL devices with a maximum current efficiency (CE) and luminance of 2.5 cd A−1 and 1300 cd m−2 for blue emission under DC reverse and 6.7 cd A−1 and 6000 cd m−2 for orange emission under DC forward as well as 3.1 cd A−1 and 6000 cd m−2 for white emission under AC, respectively.",
author = "Cho, {Sung Hwan} and Kim, {Eui Hyuk} and Beomjin Jeong and Lee, {Ju Han} and Giyoung Song and Ihn Hwang and Himchan Cho and Kim, {Kang Lib} and Seunggun Yu and Kim, {Richard Hahnkee} and Lee, {Seung Won} and Lee, {Tae Woo} and Cheolmin Park",
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Cho, SH, Kim, EH, Jeong, B, Lee, JH, Song, G, Hwang, I, Cho, H, Kim, KL, Yu, S, Kim, RH, Lee, SW, Lee, TW & Park, C 2017, 'Solution-processed electron-only tandem polymer light-emitting diodes for broad wavelength light emission', Journal of Materials Chemistry C, vol. 5, no. 1, pp. 110-117. https://doi.org/10.1039/C6TC04229E

Solution-processed electron-only tandem polymer light-emitting diodes for broad wavelength light emission. / Cho, Sung Hwan; Kim, Eui Hyuk; Jeong, Beomjin; Lee, Ju Han; Song, Giyoung; Hwang, Ihn; Cho, Himchan; Kim, Kang Lib; Yu, Seunggun; Kim, Richard Hahnkee; Lee, Seung Won; Lee, Tae Woo; Park, Cheolmin.

In: Journal of Materials Chemistry C, Vol. 5, No. 1, 01.01.2017, p. 110-117.

Research output: Contribution to journalArticle

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AU - Cho, Sung Hwan

AU - Kim, Eui Hyuk

AU - Jeong, Beomjin

AU - Lee, Ju Han

AU - Song, Giyoung

AU - Hwang, Ihn

AU - Cho, Himchan

AU - Kim, Kang Lib

AU - Yu, Seunggun

AU - Kim, Richard Hahnkee

AU - Lee, Seung Won

AU - Lee, Tae Woo

AU - Park, Cheolmin

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N2 - Polymer light-emitting diodes (PLEDs) have been of great interest for flexible mobile displays and large area solid-state lighting due to the possibility of achieving low production costs using solution processes combined with various printing technologies. Although monochromatic operation of PLEDs with high luminous efficiency and device stability has been achieved using numerous strategies, the development of color-tunable PLEDs capable of emitting a broad range of light upon the application of external stimuli still remains challenging. Here, we present a solution-processed broad range color-tunable tandem PLED of inverted and regular light emitting units (LEUs) stacked in series sharing a floating polymer electrode as a charge injection layer between two LEUs. Fine and broad wavelength color control from pure blue to pure orange is achieved when an AC field is applied with different positive-to-negative polarity heights in our tandem PLED. Our AC-driven tandem PLEDs offer a facile route to color-tunable polymer EL devices with a maximum current efficiency (CE) and luminance of 2.5 cd A−1 and 1300 cd m−2 for blue emission under DC reverse and 6.7 cd A−1 and 6000 cd m−2 for orange emission under DC forward as well as 3.1 cd A−1 and 6000 cd m−2 for white emission under AC, respectively.

AB - Polymer light-emitting diodes (PLEDs) have been of great interest for flexible mobile displays and large area solid-state lighting due to the possibility of achieving low production costs using solution processes combined with various printing technologies. Although monochromatic operation of PLEDs with high luminous efficiency and device stability has been achieved using numerous strategies, the development of color-tunable PLEDs capable of emitting a broad range of light upon the application of external stimuli still remains challenging. Here, we present a solution-processed broad range color-tunable tandem PLED of inverted and regular light emitting units (LEUs) stacked in series sharing a floating polymer electrode as a charge injection layer between two LEUs. Fine and broad wavelength color control from pure blue to pure orange is achieved when an AC field is applied with different positive-to-negative polarity heights in our tandem PLED. Our AC-driven tandem PLEDs offer a facile route to color-tunable polymer EL devices with a maximum current efficiency (CE) and luminance of 2.5 cd A−1 and 1300 cd m−2 for blue emission under DC reverse and 6.7 cd A−1 and 6000 cd m−2 for orange emission under DC forward as well as 3.1 cd A−1 and 6000 cd m−2 for white emission under AC, respectively.

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