Surface Passivation Effect on the Photoluminescence of ZnO Nanorods

Chen, Cong; He, Haiping; Lu, Yangfan; Wu, Kewei; Ye, Zhizhen

doi:10.1021/am401418b

Cited by 98 publications

(67 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chen and co-workers reported the effect of surface modification by self-assembled monolayer on the ZnO film ultraviolet sensor, 60 and examined the surface passivation effect on the photoluminescence of ZnO nanorods. 61 The results confirmed that the surface treatment of ZnO nano/microstructures is an effective and simple approach to improve some important properties of nanocomposites. Concerning the photocatalysts or dye sensitive solar cells, etc., the key issues are the generation, separation, and transfer of charges generated by visible light.…”

Section: Introductionsupporting

confidence: 62%

Supercontinuum generation in photonic crystal fibre by Ti:sapphire femtosecond laser

Xing¹,

Li²,

Wu³

et al. 2014

Materials Research Innovations

View full text Add to dashboard Cite

ZnO has many potential applications, such as, solar cells, photocatalysts, chemical sensors and biosensors. However, to extend its visible light response is still a great challenge. In this paper, ZnO nanosheets were prepared by a wet chemical method. The surface treatment of ZnO nanosheets was carried out using chloroauric acid, and then reduced with aniline. A series of characterisations were examined by TEM (transmission electron microscopy), XRD (X-ray diffraction), the Fourier transform infrared (FTIR) spectra and ultraviolet-visible spectroscopy (UVvis). The experimental results indicated that ZnO nanosheets modified with a thin layer of Au/PANi composite exhibited wide visible light response. A chemical prototype sensor was constructed based on the ZnO/Au/polyaniline nanocomposites prepared and interdigital electrodes on flexible polymer substrates. The effects of surface treatment of ZnO nanosheets on the gas sensing behaviours were examined. The results indicated that the effective conductive channels for charge transfer and separation were formed due to the Au/polyaniline necklaces attached on the surface of ZnO nanosheets, and the type of conductivity of ZnO/Au/polyaniline nanocomposite changed to P-type from N-type with increasing the amounts of chloroauric acid. When the synthesis parameter of ZnO/Au/polyaniline nanocomposite was optimised, the gas sensitivity of ZnO/Au/PANi (polyaniline) was superior to that of PANi nanowire prepared under similar synthesis condition, and it has been found that this kind of nanocomposite not only possesses widening light response, harvests more visible light, but also presents effective channels for charge transfer. It would be useful in potential applications in photocatalysts or other fields.

show abstract

Section: Introductionsupporting

confidence: 62%

Supercontinuum generation in photonic crystal fibre by Ti:sapphire femtosecond laser

Xing¹,

Li²,

Wu³

et al. 2014

Materials Research Innovations

View full text Add to dashboard Cite

show abstract

“…Moreover, additional radiative recombination emission can be caused by F doping (and possibly by H doping, as explained below) in the near surface region, which would contribute to the enhanced NBE. 67 Thus, by SF 6 plasma treatment both surface passivation effect and probably doping of the near surface region may be responsible for the observed changes in the PL spectra.…”

Section: Introductionmentioning

confidence: 96%

Surface passivation effect by fluorine plasma treatment on ZnO for efficiency and lifetime improvement of inverted polymer solar cells

et al. 2016

View full text Add to dashboard Cite

show abstract

“…1 It possesses many important applications in electronic and optical devices. 2,3 Therefore, the controlled synthesis of various one-dimension (1D) ZnO nanostructures, such as ZnO nanorods (NRs), 4 ZnO nanowires (NWs), 5 and ZnO nanocables, 6 has attracted considerable interest due to their novel properties. Zhang et al reported that ordered ZnO NRs-based heterojunction shows improved electroluminescence (EL) performance and can be used in light-emitting diodes.…”

Section: Introductionmentioning

confidence: 99%

Enhanced visible photoluminescence emission from multiple face-contact-junction ZnO nanorods coated with graphene oxide sheets

Ding

Wang

2014

Journal of Applied Physics

View full text Add to dashboard Cite

Multiple face-contact-junction ZnO nanorods (MFCJ ZnO NRs) coated with graphene oxide (GO) sheets have been realized on indium tin oxide substrates. The coated amount and thickness of GO on MFCJ ZnO NRs can be adjusted by electrodeposition time. Photoluminescence (PL) properties of MFCJ ZnO NRs coated with GO sheets are measured and found to be strongly depended on the electrodeposition time of GO sheets. The strongest visible PL emission with the appropriate GO electrodeposition time is observed. We proposed that, in this case, the surface of MFCJ ZnO NRs is coated by very thin GO sheets with ionized oxygen functional species that trap conduction electrons, causing ZnO energy band bending at the surface, which accumulates the surface charges within a very thin surface layer. The charges in surface layer transition to impurities levels cause an enhanced visible PL emission in MFCJ ZnO NRs. V C 2014 AIP Publishing LLC.

show abstract

Surface Passivation Effect on the Photoluminescence of ZnO Nanorods

Cited by 98 publications

References 28 publications

Supercontinuum generation in photonic crystal fibre by Ti:sapphire femtosecond laser

Supercontinuum generation in photonic crystal fibre by Ti:sapphire femtosecond laser

Surface passivation effect by fluorine plasma treatment on ZnO for efficiency and lifetime improvement of inverted polymer solar cells

Enhanced visible photoluminescence emission from multiple face-contact-junction ZnO nanorods coated with graphene oxide sheets

Contact Info

Product

Resources

About