Large-scale patterned multi-layer graphene films as transparent conducting electrodes for GaN light-emitting diodes
- Jo, Gunho; Choe, Minhyeok; Cho, Chu-Young; Kim, Jin Ho; Park, Woojin; Lee, Sangchul; Hong, Woong-Ki; Kim, Tae-Wook; Park, Seong-Ju; Hong, Byung Hee; Kahng, Yung Ho; Lee, Takhee
- Issue Date
- Nanotechnology, Vol.21 No.17, p. 175201
- This work demonstrates a large-scale batch fabrication of GaN light-emitting diodes (LEDs) with patterned multi-layer graphene (MLG) as transparent conducting electrodes. MLG films were synthesized using a chemical vapor deposition (CVD) technique on nickel films and showed typical CVD-synthesized MLG film properties, possessing a sheet resistance of similar to 620 Omega/square with a transparency of more than 85% in the 400-800 nm wavelength range. The MLG was applied as the transparent conducting electrodes of GaN-based blue LEDs, and the light output performance was compared to that of conventional GaN LEDs with indium tin oxide electrodes. Our results present a potential development toward future practical application of graphene electrodes in optoelectronic devices.
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