Abstract
Transparent conductive electrodes (TCE) made of carbon nanotube (CNT) and graphene composite for GaN-based light emitting diodes (LED) are presented. The TCE with 533-Ω/□ sheet resistance and 88% transmittance were obtained when chemical-vapor-deposition grown graphene was fused across CNT networks. With an additional 2-nm thin NiOx interlayer between the TCE and top p-GaN layer of the LED, the forward voltage was reduced to 5.12 V at 20-mA injection current. Four-fold improvement in terms of light output power was observed. The improvement can be ascribed to the enhanced lateral current spreading across the hybrid CNT-graphene TCE before injection into the p-GaN layer.
Original language | English (US) |
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Article number | 081902 |
Journal | Applied Physics Letters |
Volume | 109 |
Issue number | 8 |
DOIs | |
State | Published - Aug 22 2016 |
Bibliographical note
Publisher Copyright:© 2016 Author(s).
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)