Light-emitting diode based on oligo-phenylene vinylene and butyl-PBD blends

Jae Gyoung Lee, Byoungchoo Park, Hyung Suk Woo, Youngkyoo Kim, Chang Sik Ha, Choong Man Lee, KwangHo Jeong, Jeong Hyon Ha, Yong Rok Kim

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

We have fabricated light-emitting diodes (LEDs) using organic materials; a polymer blend dispersing oligo-phenylene vinylene (oligo-PV), 1,4-distyrylbenzene and 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-l,3,4-oxadiazole (butyl-PBD) as emissive materials into a soluble polyimide mixed with polyaniline (PANI) of emeraldine salt used as a hole transport material. These polymer dispersed materials were sandwiched between In and indium-tin-oxide (ITO) electrodes. In order to increase the electron injection into the emissive material, we have inserted a thin Mg layer between In and polymer blends. The electroluminescence (EL) spectra of LEDs showed noticeable enhancement of the oscillator strength of oligo-PV peak at 2.76 eV. This implies improved quantum efficiency of this blue light-emitting diode, resulting from the excitonic migration from butyl-PBD to oligo-PV. We have found that the EL device with host polymers, polyimide and PANI, displayed increasing device performance, lowering the turning point in I-V characteristics, compared to that of LED without PANI. Under normal illumination conditions, our devices with PANI showed visible blue-violet color at room temperature after applying a bias exceeding 8 V.

Original languageEnglish
Pages (from-to)895-898
Number of pages4
JournalSolid State Communications
Volume102
Issue number12
DOIs
Publication statusPublished - 1997 Jan 1

Fingerprint

Light emitting diodes
Polyaniline
light emitting diodes
polymer blends
polyimides
electroluminescence
Electroluminescence
Polymer blends
Polyimides
Polymers
Oxadiazoles
dispersing
polymers
organic materials
Electron injection
oscillator strengths
indium oxides
tin oxides
Organic light emitting diodes (OLED)
quantum efficiency

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

Lee, Jae Gyoung ; Park, Byoungchoo ; Woo, Hyung Suk ; Kim, Youngkyoo ; Ha, Chang Sik ; Lee, Choong Man ; Jeong, KwangHo ; Ha, Jeong Hyon ; Kim, Yong Rok. / Light-emitting diode based on oligo-phenylene vinylene and butyl-PBD blends. In: Solid State Communications. 1997 ; Vol. 102, No. 12. pp. 895-898.
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Light-emitting diode based on oligo-phenylene vinylene and butyl-PBD blends. / Lee, Jae Gyoung; Park, Byoungchoo; Woo, Hyung Suk; Kim, Youngkyoo; Ha, Chang Sik; Lee, Choong Man; Jeong, KwangHo; Ha, Jeong Hyon; Kim, Yong Rok.

In: Solid State Communications, Vol. 102, No. 12, 01.01.1997, p. 895-898.

Research output: Contribution to journalArticle

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T1 - Light-emitting diode based on oligo-phenylene vinylene and butyl-PBD blends

AU - Lee, Jae Gyoung

AU - Park, Byoungchoo

AU - Woo, Hyung Suk

AU - Kim, Youngkyoo

AU - Ha, Chang Sik

AU - Lee, Choong Man

AU - Jeong, KwangHo

AU - Ha, Jeong Hyon

AU - Kim, Yong Rok

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