title: Flexible GaN Light-Emitting Diodes Using GaN Microdisks Epitaxial Laterally Overgrown on Graphene Dots.
abstract: The epitaxial lateral overgrowth (ELOG) of GaN microdisks on graphene microdots and the fabrication of flexible light-emitting diodes (LEDs) using these microdisks is reported. An ELOG technique with only patterned graphene microdots is used, without any growth mask. The discrete micro-LED arrays are transferred onto Cu foil by a simple lift-off technique, which works reliably under various bending conditions.
authors.affiliation: Department of Physics and Astronomy, Institute of Applied Physics, and Research Institute of Advanced Materials, Seoul National University, Seoul, 151-747, Korea.
authors.forename: Kunook
authors.initials: K
authors.lastname: Chung
authors.affiliation: Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 151-744, Korea.
authors.forename: Hyobin
authors.initials: H
authors.lastname: Yoo
authors.affiliation: Department of Chemistry and Nano Science, Ewha Womans University, Seoul, 120-750, Korea.
authors.forename: Jerome K
authors.initials: JK
authors.lastname: Hyun
authors.affiliation: Department of Physics and Astronomy, Institute of Applied Physics, and Research Institute of Advanced Materials, Seoul National University, Seoul, 151-747, Korea.
authors.forename: Hongseok
authors.initials: H
authors.lastname: Oh
authors.affiliation: Department of Physics and Astronomy, Institute of Applied Physics, and Research Institute of Advanced Materials, Seoul National University, Seoul, 151-747, Korea.
authors.forename: Youngbin
authors.initials: Y
authors.lastname: Tchoe
authors.affiliation: Department of Physics and Astronomy, Institute of Applied Physics, and Research Institute of Advanced Materials, Seoul National University, Seoul, 151-747, Korea.
authors.forename: Keundong
authors.initials: K
authors.lastname: Lee
authors.affiliation: Department of Physics and Astronomy, Institute of Applied Physics, and Research Institute of Advanced Materials, Seoul National University, Seoul, 151-747, Korea.
authors.forename: Hyeonjun
authors.initials: H
authors.lastname: Baek
authors.affiliation: Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 151-744, Korea.
authors.forename: Miyoung
authors.initials: M
authors.lastname: Kim
authors.affiliation: Department of Physics and Astronomy, Institute of Applied Physics, and Research Institute of Advanced Materials, Seoul National University, Seoul, 151-747, Korea. gcyi@snu.ac.kr.
authors.forename: Gyu-Chul
authors.initials: GC
authors.lastname: Yi
keywords: epitaxial lateral overgrowth; flexible devices; gallium nitride microstructures; graphene substrates; light-emitting diode arrays