Carbon nanotube-graphene composite film as transparent conductive electrode for GaN-based light-emitting diodes
AuthorsKang, Chun Hong
M. Saheed, M. Shuaib
Mohamed, Norani Muti
Ng, Tien Khee
Ooi, Boon S.
Burhanudin, Zainal Arif
KAUST DepartmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
KAUST Grant NumberBAS/1/1614-01-01
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AbstractTransparent 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.
CitationKang CH, Shen C, M. Saheed MS, Mohamed NM, Ng TK, et al. (2016) Carbon nanotube-graphene composite film as transparent conductive electrode for GaN-based light-emitting diodes. Applied Physics Letters 109: 081902. Available: http://dx.doi.org/10.1063/1.4961667.
SponsorsThe authors would like to acknowledge the Graduate Assistantship Scheme from Universiti Teknologi PETRONAS. This work was partially supported by the Fundamental Research Grant Scheme from Ministry of Higher Education of Malaysia (Grant No. FRGS/1/2015/TK04/UTP/02/2), KAUST Baseline Funding (Grant No. BAS/1/1614-01-01), and King Abdulaziz City for Science and Technology (KACST) Technology Innovation Center (TIC) for Solid State Lighting (Grant No. KACST TIC R2-FP-008).
JournalApplied Physics Letters