Vertical pillar-superlattice array and graphene hybrid light emitting diodes

Jung Min Lee, Jae Woong Choung, Jaeseok Yi, Dong Hyun Lee, Monica Samal, Dong Kee Yi, Chul-Ho Lee, Gyu Chul Yi, Ungyu Paik, John A. Rogers, Won Il Park

Research output: Contribution to journalArticle

116 Citations (Scopus)

Abstract

We report a type of device that combines vertical arrays of one-dimensional (1D) pillar-superlattice (PSL) structures with 2D graphene sheets to yield a class of light emitting diode (LED) with interesting mechanical, optical, and electrical characteristics. In this application, graphene sheets coated with very thin metal layers exhibit good mechanical and electrical properties and an ability to mount, in a freely suspended configuration, on the PSL arrays as a top window electrode. Optical characterization demonstrates that graphene exhibits excellent optical transparency even after deposition of the thin metal films. Thermal annealing of the graphene/metal (Gr/M) contact to the GaAs decreases the contact resistance, to provide enhanced carrier injection. The resulting PSL-Gr/M LEDs exhibit bright light emission over large areas. The result suggests the utility of graphene-based materials as electrodes in devices with unusual, nonplanar 3D architectures.

Original languageEnglish
Pages (from-to)2783-2788
Number of pages6
JournalNano Letters
Volume10
Issue number8
DOIs
Publication statusPublished - 2010 Aug 11
Externally publishedYes

Fingerprint

Graphite
Graphene
Light emitting diodes
graphene
light emitting diodes
Metals
metals
Electrodes
electrodes
carrier injection
Light emission
Contact resistance
contact resistance
metal films
Transparency
light emission
electric contacts
Electric properties
electrical properties
mechanical properties

Keywords

  • 3D architectures
  • graphene
  • light-emitting diodes
  • Pillar array
  • transparent electrodes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanical Engineering

Cite this

Lee, J. M., Choung, J. W., Yi, J., Lee, D. H., Samal, M., Yi, D. K., ... Park, W. I. (2010). Vertical pillar-superlattice array and graphene hybrid light emitting diodes. Nano Letters, 10(8), 2783-2788. https://doi.org/10.1021/nl100648y

Vertical pillar-superlattice array and graphene hybrid light emitting diodes. / Lee, Jung Min; Choung, Jae Woong; Yi, Jaeseok; Lee, Dong Hyun; Samal, Monica; Yi, Dong Kee; Lee, Chul-Ho; Yi, Gyu Chul; Paik, Ungyu; Rogers, John A.; Park, Won Il.

In: Nano Letters, Vol. 10, No. 8, 11.08.2010, p. 2783-2788.

Research output: Contribution to journalArticle

Lee, JM, Choung, JW, Yi, J, Lee, DH, Samal, M, Yi, DK, Lee, C-H, Yi, GC, Paik, U, Rogers, JA & Park, WI 2010, 'Vertical pillar-superlattice array and graphene hybrid light emitting diodes', Nano Letters, vol. 10, no. 8, pp. 2783-2788. https://doi.org/10.1021/nl100648y
Lee JM, Choung JW, Yi J, Lee DH, Samal M, Yi DK et al. Vertical pillar-superlattice array and graphene hybrid light emitting diodes. Nano Letters. 2010 Aug 11;10(8):2783-2788. https://doi.org/10.1021/nl100648y
Lee, Jung Min ; Choung, Jae Woong ; Yi, Jaeseok ; Lee, Dong Hyun ; Samal, Monica ; Yi, Dong Kee ; Lee, Chul-Ho ; Yi, Gyu Chul ; Paik, Ungyu ; Rogers, John A. ; Park, Won Il. / Vertical pillar-superlattice array and graphene hybrid light emitting diodes. In: Nano Letters. 2010 ; Vol. 10, No. 8. pp. 2783-2788.
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