Phosphorus Doping in Si Nanocrystals/SiO2 Multilayers and Light Emission with Wavelength Compatible for Optical Telecommunication

Lü, Peng; Mu, Weiwei; Xu, Jun; Zhang, Wenping; Li, Wei; Xu, Ling; Chen, Kunji

doi:10.1038/srep22888

Cited by 58 publications

(69 citation statements)

References 50 publications

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“…DMPO-ESR spin trapping spectrum was used to detect ·OH and ·O 2 − in solution 71,72 . As shown in Figure.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Reduced Grapheme Oxide as A Platform for loading β-NaYF4:Ho3+@TiO2Based on An Advanced Visible Light-Driven Photocatalyst

Fan

2017

Sci Rep

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In this paper a novel visible light-driven ternary compound photocatalyst (β-NaYF4:Ho3+@TiO2-rGO) was synthesized using a three-step approach. This photocatalyst was characterized using X-ray diffraction, Raman scattering spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, Transmission electron microscopy, X-ray photoelectron spectroscopy, fluorescence spectrometries, ultraviolet-visible diffuse reflectance spectroscopy, Brunauer–Emmett–Teller surface area measurement, electron spin resonance, three-dimensional fluorescence spectroscopy, and photoelectrochemical properties. Such proposed photocatalyst can absorb 450 nm visible light while emit 290 nm ultraviolet light, so as to realize the visible light-driven photocatalysis of TiO2. In addition, as this tenary compound photocatalyst enjoys effecitve capacity of charge separation, superior durability, and sound adsorb ability of RhB, it can lead to the red shift of wavelength of absorbed light. This novel tenary photocatalyst can reach decomposition rate of RhB as high as 92% after 10 h of irradiation by visible-light Xe lamp. Compared with the blank experiment, the efficiency was significantly improved. Recycle experiments showed that theβ-NaYF4:Ho3+@TiO2-rGOcomposites still presented significant photocatalytic activity after four successive cycles. Finally, we investigated visible-light-responsive photocatalytic mechanism of the β-NaYF4:Ho3+@TiO2-rGO composites. It is of great significance to design an effective solar light-driven photocatalysis in promoting environmental protection.

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“…DMPO-ESR spin trapping spectrum was used to detect ·OH and ·O 2 − in solution 71,72 . As shown in Figure.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Reduced Grapheme Oxide as A Platform for loading β-NaYF4:Ho3+@TiO2Based on An Advanced Visible Light-Driven Photocatalyst

Fan

2017

Sci Rep

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“…13, top panel). In the case of P, the XPS spectra suggested that most of the P atoms were located in the Si layer and at the Si/SiO 2 interface [205] (see Fig. 13, bottom right panel).…”

Section: Matrix-embedded Nanocrystalsmentioning

confidence: 99%

Doped and codoped silicon nanocrystals: The role of surfaces and interfaces

Marri

Degoli

Ossicini

2017

Progress in Surface Science

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Si nanocrystals have been extensively studied because of their novel properties and their potential applications in electronic, optoelectronic, photovoltaic, thermoelectric and biological devices. These new properties are achieved through the combination of the quantum confinement of carriers and the strong influence of surface chemistry. As in the case of bulk Si the tuning of the electronic, optical and transport properties is related to the possibility of doping, in a controlled way, the nanocrystals. This is a big challenge since several studies have revealed that doping in Si nanocrystals differs from the one of the bulk. Theory and experiments have underlined that doping and codoping are influenced by a large number of parameters such as size, shape, passivation and chemical environment of the silicon nanocrystals. However, the connection between these parameters and dopant localization as well as the occurrence of self-purification effects are still not clear. In this review we summarize the latest progress in this fascinating research field considering free-standing and matrix-embedded Si nanocrystals both from the theoretical and experimental point of view, with special attention given to the results obtained by ab-initio calculations and to size-, surface- and interface-induced effects

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“…It has been recently shown that doping is a critical means to realize the full potential of Si NCs [16][17][18][19]. For example, low-energy light emission related to the transitions of electrons from the band edge to the defect state has been observed in boron (B)-and phosphorus (P)-doped Si NCs [20][21][22][23], leading to enhanced tunability of the light emission from Si NCs. In addition, heavy B and P doping have enabled localized surface plasmon resonance (LSPR) for Si NCs [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Density functional theory study on the B doping and B/P codoping of Si nanocrystals embedded in SiO2

Cottenier

et al. 2017

Phys. Rev. B

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Doping silicon nanocrystals (Si NCs) embedded in silicon dioxide (SiO 2 ) with boron (B) and phosphorus (P) is a promising way of tuning the properties of Si NCs. Here we take advantage of density functional theory to investigate the dependence of the structural and electronic properties of Si NCs embedded in SiO 2 on the doping of B and P. The locations and energy-level schemes are examined for singularly B-doped or B/P-codoped Si NCs embedded in SiO 2 with a perfect or defective Si/SiO 2 interface at which a Si dangling bond exists. A dangling bond plays an important role in the doping of Si NCs with B or B/P. The doping behavior of B in Si NCs embedded in SiO 2 vastly differs from that of P. The electronic structure of a B/P-codoped Si NC largely depends on the distribution of the dopants in the NC.

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Phosphorus Doping in Si Nanocrystals/SiO2 Multilayers and Light Emission with Wavelength Compatible for Optical Telecommunication

Cited by 58 publications

References 50 publications

Synthesis of Reduced Grapheme Oxide as A Platform for loading β-NaYF4:Ho3+@TiO2Based on An Advanced Visible Light-Driven Photocatalyst

Synthesis of Reduced Grapheme Oxide as A Platform for loading β-NaYF4:Ho3+@TiO2Based on An Advanced Visible Light-Driven Photocatalyst

Doped and codoped silicon nanocrystals: The role of surfaces and interfaces

Density functional theory study on the B doping and B/P codoping of Si nanocrystals embedded in SiO2

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