Flexible organic light-emitting diodes with transparent carbon nanotube electrodes: Problems and solutions

Liangbing Hu, Jianfeng Li, Jun Liu, George Grüner, Tobin J Marks

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

We study in detail here the application of transparent, conductive carbon single-wall nanotube (SWNT) networks as electrodes in flexible organic light-emitting diodes (FOLEDs). Overall comparisons of these networks to the commonly used electrodes poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and indium tin oxide (ITO) are made, and SWNT networks are shown to have excellent optical and superior mechanical properties. The effects of protruding nanotubes, rough surface morphology, and SWNT network-adjacent layer dewetting are shown to be problematic, and approaches for addressing these issues are identified. The mechanical properties of SWNT networks and ITO are compared, and SWNT networks are shown to exhibit more durable sheet conductance under bending, which leads to bendable FOLEDs. We demonstrated FOLEDs with SWNT network anodes that exhibit outstanding light output and meet display requirements. SWNT-based FOLEDs show comparable lifetime performances to ITO-based devices. The promise and the remaining challenges for implementing SWNT networks in organic light-emitting diodes are discussed.

Original languageEnglish
Article number155202
JournalNanotechnology
Volume21
Issue number15
DOIs
Publication statusPublished - 2010

Fingerprint

Carbon Nanotubes
Organic light emitting diodes (OLED)
Nanotubes
Carbon nanotubes
Electrodes
Tin oxides
Indium
Mechanical properties
Styrene
Surface morphology
Anodes
Carbon
Display devices

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Flexible organic light-emitting diodes with transparent carbon nanotube electrodes : Problems and solutions. / Hu, Liangbing; Li, Jianfeng; Liu, Jun; Grüner, George; Marks, Tobin J.

In: Nanotechnology, Vol. 21, No. 15, 155202, 2010.

Research output: Contribution to journalArticle

Hu, Liangbing ; Li, Jianfeng ; Liu, Jun ; Grüner, George ; Marks, Tobin J. / Flexible organic light-emitting diodes with transparent carbon nanotube electrodes : Problems and solutions. In: Nanotechnology. 2010 ; Vol. 21, No. 15.
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