Enhancement of band gap emission stimulated by defect loss

Lin, Hsia Yu; Cheng, Chien‐Chuan; Chou, Y. Y.; Huang, Long-Sun; Chen, Y. F.; Tsen, Kong-Thon

doi:10.1364/oe.14.002372

Cited by 163 publications

(128 citation statements)

References 16 publications

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“…In the Ag/ZnO nanostructure, the Fermi level of Ag is near some defect levels (2.25 eV and 2.46 eV) of ZnO 26,27 (Fig. 6(b)); therefore, electrons can be transferred from the ZnO defect levels to the Fermi level of Ag, where these electrons are excited by incident light.…”

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confidence: 99%

Synthesis and properties of Ag/ZnO core/shell nanostructures prepared by excimer laser ablation in liquid

Zhao

Zeng

et al. 2015

APL Materials

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Ag/ZnO core/shell nanostructure was synthesised by a 248-nm KrF excimer pulsed laser ablation in a liquid solution for the first time. It was found that the surface plasma resonance absorption of the Ag/ZnO core/shell nanostructures can be tuned by the thickness of the ZnO shell, which is in agreement with the finite difference in the time domain simulation. Furthermore, the ultraviolet emission spectrum of the Ag/ZnO core/shell nanostructures was stronger and blue-shifted compared with that of pure ZnO nanoparticles. This interesting photoluminescent phenomenon is analysed in detail and a possible explanation is proposed.

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confidence: 99%

Synthesis and properties of Ag/ZnO core/shell nanostructures prepared by excimer laser ablation in liquid

Zhao

Zeng

et al. 2015

APL Materials

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“…Characteristic peaks for the Au and Zn moieties are confirmed by the energy dispersive X-ray (EDX) spectrum in Figure 7 b, indicating that Au NPs are successfully introduced to the ZnO nanorings. Such hybrid Au-ZnO nanostructures may exhibit unique photocatalytic activity, [59][60] enhanced light emission, [61][62] or surface-plasmon-resonance-based sensing properties. [63][64] …”

Section: Full Papermentioning

confidence: 99%

Ultrahigh Density Arrays of Toroidal ZnO Nanostructures by One‐Step Cooperative Self‐Assembly Processes: Mechanism of Structural Evolution and Hybridization with Au Nanoparticles

Jang¹,

Yang

Jang³

et al. 2011

Chemistry A European J

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A quick protocol for the fabrication of ultrahigh density arrays of toroidal ZnO nanostructures with tailored structures on a substrate surface is presented based on the one-step spin coating of a common solution composed of inverse micelles of polystyrene-block-poly(4-vinyl pyridine) copolymers (PS-b-P4VP) and sol-gel precursors without the need of conventional complex lithographic techniques. ZnO toroids decorated with gold nanoparticles are also obtained by subsequent loading and reduction of metallic precursors. It was elucidated that the diethanolamine moiety in the sol-gel precursors, which induces selective swelling and structural reorganization of the P4VP core blocks, plays a key role in the generation of toroidal nanostructures. Toroidal ZnO nanostructures embedded in a PS-b-P4VP matrix films or arrays of pure wurtzite ZnO nanorings are obtained by calcination under inert atmosphere. The structural parameters of the toroidal nanostructures such as the width, height, diameter of the rims as well as the spacing of their 2D arrays are controlled by employing PS-b-P4VP with different molecular weight and varying the mixing protocols.

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“…In addition, another important factor is a large number of carriers' recombination, which resulted in low fluorescence efficiency. Therefore, considerable efforts have been made to enlarge the absorption spectrum in UV region to enhance fluorescence efficiency of ZnO NRs [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Photoelectric Properties of Large Area ZnO Nanorod with Au Nanospheres

et al. 2015

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Novel gold nanospheres top-contact ZnO nanorods arrays were fabricated via combination of self-assemble nanosphere lithography and low-cost hydrothermal chemical method. Gold nanoparticles of different geometries are used to enhance the fluorescent properties of ZnO nanorods based on localized surface plasmonic resonances. The results show that defect-related emission intensity ratio of the ZnO nanorods arrays can be improved up to two orders, and the defectrelated emission peak red-shifted from 577 to 623 nm. This improvement is attributed to the enhanced localized surface plasmonic absorption of gold nanoparticles, which implies a promising application in surface plasmonic enhanced spectra.

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Enhancement of band gap emission stimulated by defect loss

Cited by 163 publications

References 16 publications

Synthesis and properties of Ag/ZnO core/shell nanostructures prepared by excimer laser ablation in liquid

Synthesis and properties of Ag/ZnO core/shell nanostructures prepared by excimer laser ablation in liquid

Ultrahigh Density Arrays of Toroidal ZnO Nanostructures by One‐Step Cooperative Self‐Assembly Processes: Mechanism of Structural Evolution and Hybridization with Au Nanoparticles

Fabrication and Photoelectric Properties of Large Area ZnO Nanorod with Au Nanospheres

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