Title: ZnO-Coated Carbon Nanotubes: Inter-Diffusion of Carboxyl Groups and Enhanced Photocurrent Generation
Authors: Hung, Chia-I
Wen, Hua-Chiang
Lai, Yao-Cheng
Chang, Shih-Hsin
Chou, Wu-Ching
Hsu, Wen-Kuang
Department of Electrophysics
Keywords: carbon nanotubes;defects;nanostructures;photocurrent;zinc oxide
Issue Date: 16-Mar-2015
Abstract: ZnO is a defect-governed oxide and emits light at both visible and UV regimes. This work employs atomic layer deposition to produce oxide particles on oxygenated carbon nanotubes, and the composites only show emission profiles at short wavelengths. The quenching of defect-related emissions at long wavelengths is verified, owing to carboxyl diffusion into oxygen vacancies, and doping is supported by ZnCO3 formation in oxide lattice. Fully coated tubes display an increased photocurrent and the quantum efficiency increases by 22% relative to the bare nanotubes.
URI: http://dx.doi.org/10.1002/cphc.201402736
ISSN: 1439-4235
DOI: 10.1002/cphc.201402736
Volume: 16
Begin Page: 812
End Page: 816
Appears in Collections:Articles