ZnO-coated carbon nanotubes: Inter-diffusion of carboxyl groups and enhanced photocurrent generation

Chia I. Hung, Hua Chiang Wen, Yao Cheng Lai, Shih Hsin Chang, Wu-Ching Chou, Wen Kuang Hsu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

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.

Original languageEnglish
Pages (from-to)812-816
Number of pages5
JournalChemPhysChem
Volume16
Issue number4
DOIs
StatePublished - 16 Mar 2015

Keywords

  • carbon nanotubes
  • defects
  • nanostructures
  • photocurrent
  • zinc oxide

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