Microtube Light-Emitting Diode Arrays with Metal Cores

Youngbin Tchoe, Chul-Ho Lee, Jun Beom Park, Hyeonjun Baek, Kunook Chung, Janghyun Jo, Miyoung Kim, Gyu Chul Yi

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We report the fabrication and characteristics of vertical microtube light-emitting diode (LED) arrays with a metal core inside the devices. To make the LEDs, gallium nitride (GaN)/indium gallium nitride (InxGa1-xN)/zinc oxide (ZnO) coaxial microtube LED arrays were grown on an n-GaN/c-aluminum oxide (Al2O3) substrate. The microtube LED arrays were then lifted-off the substrate by wet chemical etching of the sacrificial ZnO microtubes and the silicon dioxide (SiO2) layer. The chemically lifted-off LED layer was then transferred upside-down on other supporting substrates. To create the metal cores, titanium/gold and indium tin oxide were deposited on the inner shells of the microtubes, forming n-type electrodes inside the metal-cored LEDs. The characteristics of the resulting devices were determined by measuring electroluminescence and current-voltage characteristic curves. To gain insights into the current-spreading characteristics of the devices and understand how to make them more efficient, we modeled them computationally.

Original languageEnglish
Pages (from-to)3114-3120
Number of pages7
JournalACS Nano
Volume10
Issue number3
DOIs
Publication statusPublished - 2016 Mar 22

Fingerprint

Light emitting diodes
light emitting diodes
Metals
Gallium nitride
gallium nitrides
metals
Zinc Oxide
Zinc oxide
zinc oxides
Indium
Substrates
Wet etching
Aluminum Oxide
Electroluminescence
Current voltage characteristics
Titanium
Tin oxides
Silicon Dioxide
Gold
electroluminescence

Keywords

  • current spreading
  • gallium nitride
  • light-emitting diodes
  • metal core
  • nanoarchitecture

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Tchoe, Y., Lee, C-H., Park, J. B., Baek, H., Chung, K., Jo, J., ... Yi, G. C. (2016). Microtube Light-Emitting Diode Arrays with Metal Cores. ACS Nano, 10(3), 3114-3120. https://doi.org/10.1021/acsnano.5b07905

Microtube Light-Emitting Diode Arrays with Metal Cores. / Tchoe, Youngbin; Lee, Chul-Ho; Park, Jun Beom; Baek, Hyeonjun; Chung, Kunook; Jo, Janghyun; Kim, Miyoung; Yi, Gyu Chul.

In: ACS Nano, Vol. 10, No. 3, 22.03.2016, p. 3114-3120.

Research output: Contribution to journalArticle

Tchoe, Y, Lee, C-H, Park, JB, Baek, H, Chung, K, Jo, J, Kim, M & Yi, GC 2016, 'Microtube Light-Emitting Diode Arrays with Metal Cores', ACS Nano, vol. 10, no. 3, pp. 3114-3120. https://doi.org/10.1021/acsnano.5b07905
Tchoe Y, Lee C-H, Park JB, Baek H, Chung K, Jo J et al. Microtube Light-Emitting Diode Arrays with Metal Cores. ACS Nano. 2016 Mar 22;10(3):3114-3120. https://doi.org/10.1021/acsnano.5b07905
Tchoe, Youngbin ; Lee, Chul-Ho ; Park, Jun Beom ; Baek, Hyeonjun ; Chung, Kunook ; Jo, Janghyun ; Kim, Miyoung ; Yi, Gyu Chul. / Microtube Light-Emitting Diode Arrays with Metal Cores. In: ACS Nano. 2016 ; Vol. 10, No. 3. pp. 3114-3120.
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