Premium
ZnO‐Coated Carbon Nanotubes: Inter‐Diffusion of Carboxyl Groups and Enhanced Photocurrent Generation
Author(s) -
Hung ChiaI,
Wen HuaChiang,
Lai YaoCheng,
Chang ShihHsin,
Chou WuChing,
Hsu WenKuang
Publication year - 2015
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201402736
Subject(s) - photocurrent , carbon nanotube , oxide , materials science , photoconductivity , photochemistry , wavelength , diffusion , chemical engineering , atomic layer deposition , quenching (fluorescence) , doping , carbon fibers , chemical physics , nanotechnology , layer (electronics) , chemistry , optoelectronics , fluorescence , optics , composite material , physics , composite number , engineering , metallurgy , thermodynamics
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 ZnCO 3 formation in oxide lattice. Fully coated tubes display an increased photocurrent and the quantum efficiency increases by 22 % relative to the bare nanotubes.