Enhancement of porous silicon photoluminescence by electroless deposition of nickel

Amdouni, Sonia; Rahmani, M.; Zaïbi, M.-A.; Oueslati, M.

doi:10.1016/j.jlumin.2014.08.041

Cited by 31 publications

(13 citation statements)

References 33 publications

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“…An increase of the luminescence intensity has been observed with increasing immersion time from 1 to 7 min and a subsequent decrease of the intensity with further increasing immersion time. Furthermore, a blue shift of the spectrum has been measured [26]. Figure 7 depicts these findings.…”

Section: Optical Properties Of Microporous Siliconmentioning

confidence: 64%

“…First a current density of 0.6 mAcm −2 has ben applied before the electroless deposition. The duration of the electroless reaction process was varied between 0 and 11 min [26]. Pulsed electrodeposition is employed to deposit Ni from the so-called Watts electrolyte consisting of NiCl 2 (45 g/l) and NiSO 4 (300 g/l) within porous silicon.…”

Section: Fabrication and Metal Filling Of Microporous Siliconmentioning

confidence: 99%

“…A further approach is to use the metal filling of microporous silicon to enhance the intensity of the photoluminescence. Metals such as iron, nickel or cobalt are employed and they lead to an enhancement of the photoluminescence of porous silicon due to the passivation of the silicon dangling bonds formed after the anodization process [25][26][27]. Gold and silver nanoparticles placed on porous silicon feature the localized surface plasmon resonance whereas the porous silicon as dielectric spacing layer enhances the plasmon resonance [28].…”

Section: Introductionmentioning

confidence: 99%

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Metal Filled Nanostructured Silicon With Respect to Magnetic and Optical Properties

Granitzer

Rumpf

2020

Front. Phys.

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Within this work the utilization of nanostructured silicon as host material for filling with various magnetic nanostructures is reviewed whereas the magnetic and optical properties of the gained composite systems are elucidated. The metal filling of the pores is mainly performed by electroless deposition or by electrodeposition which is discussed by means of some examples. Furthermore, two different types of porous silicon (PSi) morphology are used for the deposition procedure. On the one hand microporous silicon offering luminescence in the visible range is utilized as template material. It offers a branched morphology with a structure size between 2 and 5 nm. In this case not only the magnetic response is investigated but also the influence of the metal filling on the optical properties. On the other hand mesoporous and macroporous silicon in it's low pore regime is employed which offers straight pores with diameters up to 90 nm. In this case the magnetic response strongly depends on the size, the geometry and the spatial distribution of the metal deposits within the pores. A crucial role plays also the morphology of the porous silicon, especially the distance between adjacent pores which is an important parameter regarding magnetic interactions.

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Section: Optical Properties Of Microporous Siliconmentioning

confidence: 64%

Section: Fabrication and Metal Filling Of Microporous Siliconmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Metal Filled Nanostructured Silicon With Respect to Magnetic and Optical Properties

Granitzer

Rumpf

2020

Front. Phys.

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“…The transition metals (i.e. iron, cobalt or nickel) are the solution; it can be used for delegating inside the silicon pores that makes a change of the PS optical properties [4].…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence Emission Control of Porous Silicon

Nabil¹

2019

SNL

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This paper reports the feasibility of synthesis and characterization of nano-porous silicon (NPS) powder and (Nickel/nano-porous silicon, Ni/NPS) nano-composite prepared using dual techniques (alkaline chemical etching process and ultra-sonication technique). The structural and the optical properties of the fabricated structures are inspected using X-ray Diffraction, Fourier Transform Infrared Spectrophotometer, Raman Spectroscopy, and Fluorescence Spectrophotometer Photoluminescence. All the results have agreed that NPS is one of the most suitable materials used as active material in the LED fabrication; by changing the main factors in the preparation process, so the different physical and chemical properties are obtained. NPS produces two emission regions that correspond to orange-red and dark red; on the other hand, (Ni/NPS) produce the yellow emission. So, the photoluminescence emission is controllable by adjusting the preparation conditions. The optical data recorded here are useful for the production of the nanoscale optical devices.

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“…Electroless technology was invented by Brenner and Riddell in 1946. 2 Generally, metal surfaces and alloys have deficiencies such as low strength, low corrosion resistance, inappropriate wear resistance etc. Some of these deficiencies can be overcome by adding alloying elements as in the case of stainless steels.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Electroless Bath Parameters and Heat Treatment on the Properties of Ni-P and Ni-P-Cu Composite Coatings

et al. 2018

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NiP -(Cu) composite coatings were applied on a St37 steel in an acidic bath of hypophosphite composite. The effect of the concentration of the Cu particles and pH of the solutionon the amount of Ni and P of the coatings, their morphology, and hardness of the coatings were explored. Some of the coated samples were also heat treated at 400ºC for 1 hour. The phases formed, the microstructure and the amount of the alloying elements of the coatings were analyzed by X-Ray powder diffraction (XRD), Scanning Electron Microscope (SEM) equiped with Energy Dispersive Spectroscopy (EDS). Results show that although adding Cu particles reduced the hardness of NiP coating (from 482.4 to 351.2 VH in 1 gr/lit Cu), within NiP -Cu composite coatings the hardness of NiP -Cu composite coating increased from 351.2 to 380.7 VH by increasing the Cu particles from 1 to 7 gr/lit. The structure of the coating was crystalline during the heat treatment making the coating harder. With increasing the pH of the solution from 4.5 to 7 and then to 9, the weight percent of P and the particle of Cu were reduced.

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Enhancement of porous silicon photoluminescence by electroless deposition of nickel

Cited by 31 publications

References 33 publications

Metal Filled Nanostructured Silicon With Respect to Magnetic and Optical Properties

Metal Filled Nanostructured Silicon With Respect to Magnetic and Optical Properties

Photoluminescence Emission Control of Porous Silicon

The Effect of Electroless Bath Parameters and Heat Treatment on the Properties of Ni-P and Ni-P-Cu Composite Coatings

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