Three-dimensional graphene foam-based transparent conductive electrodes in GaN-based blue light-emitting diodes

Byung Jae Kim, Gwangseok Yang, Min Joo Park, Joon Seop Kwak, Kwang Hyeon Baik, Donghwan Kim, Jihyun Kim

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

We demonstrated three-dimensional (3D) graphene foam-based transparent conductive electrodes in GaN-based blue light-emitting diodes (LEDs). A 3D graphene foam structure grown on 3D Cu foam using a chemical vapor deposition method was transferred onto a p-GaN layer of blue LEDs. Optical and electrical performances were greatly enhanced by employing 3D graphene foam as transparent conductive electrodes in blue LED devices, which were analyzed by electroluminescence measurements, micro-Raman spectroscopy, and light intensity-current-voltage testing. The forward operating voltage and the light output power at an injection current of 100 mA of the GaN-based blue LEDs with a graphene foam-based transparent conductive electrode were improved by ∼26 and ∼14, respectively. The robustness, high transmittance, and outstanding conductivity of 3D graphene foam show great potentials for advanced transparent conductive electrodes in optoelectronic devices.

Original languageEnglish
Article number161902
JournalApplied Physics Letters
Volume102
Issue number16
DOIs
Publication statusPublished - 2013 Apr 22

Bibliographical note

Funding Information:
The research at Korea University was supported by LG Innotek-Korea University Nano-Photonics Program, the Center for Inorganic Photovoltaic Materials (No. 2012-0001171) Grant funded by the Korea government (MEST), a Korea University Grant and the Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) Grant funded by the Korea government Ministry of Knowledge Economy (No. 20104010100640).

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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