Luminance efficiency enhancement in organic light-emitting devices utilizing 4,7-diphenyl-1,10-phenanthroline/ aluminum tris(8-hydroxyquinoline) multiple heterostructures acting as an electron transport layer

D. C. Choo, H. S. Bang, Taewhan Kim, Y. Y. Jin, J. H. Seo, Y. K. Kim

Research output: Contribution to journalArticle

Abstract

The electrical and optical properties of organic light-emitting devices (OLEDs) with three periods of 4,7-diphenyl-1,10-phenanthroline (BPhen)/aluminum tris(8- hydroxyquinolate) (Alq3) multiple heterostructures acting as an electron transport layer (ETL) were investigated.While the leakage current of OLEDs with multiple heterostructures was smaller than that of OLEDs without multiple heterostructures, the luminance efficiency was larger than that of OLEDs without multiple heterostructures. The BPhen layers in the multiple heterostructures blocked holes from the emitting layer (EML) to the ETL, and they enhanced the electron injection from the cathode to the EML, resulting in an increase in the luminance efficiency.

Original languageEnglish
Pages (from-to)40-46
Number of pages7
JournalMolecular Crystals and Liquid Crystals
Volume551
DOIs
StatePublished - 2011 Nov 21

Fingerprint

luminance
Heterojunctions
Luminance
aluminum
Aluminum
augmentation
electrons
Electron injection
Leakage currents
Electric properties
Cathodes
leakage
Optical properties
cathodes
electrical properties
Electron Transport
tris-(8-hydroxyquinoline)aluminum
bathophenanthroline
injection
optical properties

Keywords

  • Current density
  • Electron transport layer
  • Hole blocking
  • Luminance efficiency
  • Multiple heterostructure
  • Organic light-emitting diode

Cite this

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title = "Luminance efficiency enhancement in organic light-emitting devices utilizing 4,7-diphenyl-1,10-phenanthroline/ aluminum tris(8-hydroxyquinoline) multiple heterostructures acting as an electron transport layer",
abstract = "The electrical and optical properties of organic light-emitting devices (OLEDs) with three periods of 4,7-diphenyl-1,10-phenanthroline (BPhen)/aluminum tris(8- hydroxyquinolate) (Alq3) multiple heterostructures acting as an electron transport layer (ETL) were investigated.While the leakage current of OLEDs with multiple heterostructures was smaller than that of OLEDs without multiple heterostructures, the luminance efficiency was larger than that of OLEDs without multiple heterostructures. The BPhen layers in the multiple heterostructures blocked holes from the emitting layer (EML) to the ETL, and they enhanced the electron injection from the cathode to the EML, resulting in an increase in the luminance efficiency.",
keywords = "Current density, Electron transport layer, Hole blocking, Luminance efficiency, Multiple heterostructure, Organic light-emitting diode",
author = "Choo, {D. C.} and Bang, {H. S.} and Taewhan Kim and Jin, {Y. Y.} and Seo, {J. H.} and Kim, {Y. K.}",
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T1 - Luminance efficiency enhancement in organic light-emitting devices utilizing 4,7-diphenyl-1,10-phenanthroline/ aluminum tris(8-hydroxyquinoline) multiple heterostructures acting as an electron transport layer

AU - Choo, D. C.

AU - Bang, H. S.

AU - Kim, Taewhan

AU - Jin, Y. Y.

AU - Seo, J. H.

AU - Kim, Y. K.

PY - 2011/11/21

Y1 - 2011/11/21

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AB - The electrical and optical properties of organic light-emitting devices (OLEDs) with three periods of 4,7-diphenyl-1,10-phenanthroline (BPhen)/aluminum tris(8- hydroxyquinolate) (Alq3) multiple heterostructures acting as an electron transport layer (ETL) were investigated.While the leakage current of OLEDs with multiple heterostructures was smaller than that of OLEDs without multiple heterostructures, the luminance efficiency was larger than that of OLEDs without multiple heterostructures. The BPhen layers in the multiple heterostructures blocked holes from the emitting layer (EML) to the ETL, and they enhanced the electron injection from the cathode to the EML, resulting in an increase in the luminance efficiency.

KW - Current density

KW - Electron transport layer

KW - Hole blocking

KW - Luminance efficiency

KW - Multiple heterostructure

KW - Organic light-emitting diode

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