期刊
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
卷 71, 期 3, 页码 156-160出版社
KOREAN PHYSICAL SOC
DOI: 10.3938/jkps.71.156
关键词
Graphene oxide; Thermal reduction; Raman spectroscopy
资金
- Research Base Construction Fund Support Program - Chonbuk National University
- Ministry of Trade, Industry Energy (MOTIE)
- Korea Institute for Advancement of Technology (KIAT) through the encouragement program for the industries of economic cooperation region [R0004855]
- MOTIE, Korea [N0001363]
Reduced graphene oxide (rGO) has attracted significant attention as an easily fabricable twodimensional material. Depending on the oxygen-containing functional groups (OFGs) in an rGO specimen, the optical and electrical properties can vary significantly, directly affecting the performance of devices in which rGO is implemented. Here, we investigated the optical and electrical properties of GO treated with various annealing (reduction) temperatures from 350 to 950 A degrees C in H-2 ambient. Using diverse characteristic tools, we found that the transmittance, nanoscale domain size, OFGs in GO and rGO, and Schottky barrier height (SBH) measured on n-type GaN are significantly influenced by the annealing temperature. The relative intensity of the defect-induced band in Raman spectroscopy showed a minimum at the annealing temperature of approximately 350 A degrees C, before the OFGs in rGO showed vigorous changes in relative content. When the domain size of rGO reached a minimum at the annealing temperature of 650 A degrees C, the SBH of rGO/GaN showed the maximum value of 1.07 eV.
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