Highly efficient and stable luminescence of nanocrystalline porous silicon treated by high-pressure water vapor annealing

Gelloz, Bernard; Kojima, Akira; Koshida, Nobuyoshi

doi:10.1063/1.2001136

Cited by 175 publications

(172 citation statements)

References 17 publications

Supporting

Mentioning

164

Contrasting

Order By: Relevance

“…Gelloz et al prepared porous Si treated by high-pressure water vapor annealing [16][17][18][19][20] . Even though this method achieved a drastic enhancement in the PL efficiency, specialized and expensive equipment was required.…”

Section: Introductionmentioning

confidence: 99%

Improvement of the Photoluminescence of Porous Si Powder via Oxidation in Organic Solvents

Nishio

Matsumoto

Mabuchi

et al. 2016

Trans. Mat. Res. Soc. Japan

View full text Add to dashboard Cite

We studied the photoluminescence (PL) of porous Si powder via oxidation in distilled water and organic solvents of ethanol, acetone and hexane. Porous Si powder aged in an ethanol solution increased in PL intensity up to 50 times over 4 days. Even though the PL intensity of porous Si aged in acetone and hexane solutions also increased, the increase was smaller than that of seen in the ethanol solution. Porous Si powder oxidized in an ethanol solution shows the best improvement in PL intensity for all the used solvents. However, the PL intensity of porous Si aged in distilled water decreased. The PL intensity of porous Si aged in deaerated ethanol slowly increased indicating that the surface oxidation of porous Si was caused by the oxygen dissolved in the organic solvents. Oxidation of a porous Si surface strongly depends on the type of organic solvent.

show abstract

Section: Introductionmentioning

confidence: 99%

Improvement of the Photoluminescence of Porous Si Powder via Oxidation in Organic Solvents

Nishio

Matsumoto

Mabuchi

et al. 2016

Trans. Mat. Res. Soc. Japan

View full text Add to dashboard Cite

show abstract

“…By modifying PSi surface states, improvements of luminescent and photosensitization properties of PSi have been realized. [8][9][10] Furthermore, PSi-based nanocomposites with other materials such as metals and polymers were studied with the aim of enhancing their functionality (e.g., catalytic activity and magnetism). 11 Several methods for the preparation of PSi-based nanocomposites have been proposed.…”

Section: Introductionmentioning

confidence: 99%

Properties of magnetic nickel/porous-silicon composite powders

Nakamura

Adachi

2012

AIP Advances

View full text Add to dashboard Cite

The magnetic and photoluminescence (PL) properties of nickel/porous-silicon (Ni/PSi) composite powders are investigated. Ni/PSi composite powders are prepared by stain etching of Si powder in a HF/HNO3 solution followed by electroless plating of Ni nanoparticles on the stain-etched PSi powder in a NiCl2 solution. The Ni/PSi powders exhibit hydrophillicity, superparamagnetism caused by the deposited Ni nanoparticles, and orange-red PL owing to the nanostructured PSi surface. The degree of magnetization decreases with increasing Ni plating time, indicating its dependence on the size of the Ni nanoparticles. The Ni/PSi composite powders also show a stronger magnetization as compared to that of the Ni-particle-plated Si powder. The stronger magnetization results from the larger surface area of PSi. The PL intensity, peak wavelength, and lifetime of Ni/PSi are strongly dependent on the NiCl2 concentration. This dependence is due to the different thickness of the oxide overlayer on the PSi surface formed during the Ni plating process. The existence of the oxide overlayer also results in a small change in the PL intensity against excitation time

show abstract

“…Many efforts have been carried out to solve this physical inability. One of the possible candidate systems is silicon nanostructures such as porous silicon (PS) [1,2], silicon nanocrystallines (SiNCs) [3][4][5], and silicon nanowires (SiNWs) [6,7]. The remarkable characteristics of visible photoluminescence (PL) in porous silicon at room temperature have given great impulse to these material studies [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Peculiarities of Photoluminescence in Porous Silicon Prepared by Metal-Assisted Chemical Etching

et al. 2012

View full text Add to dashboard Cite

Photoluminescent (PL) porous layers were formed on p-type silicon by a metal-assisted chemical etching method using H 2 O 2 as an oxidizing agent. Silver particles were deposited on the (100) Si surface prior to immersion in a solution of HF and H 2 O 2 . The morphology of the porous silicon (PS) layer formed by this method was investigated by atomic force microscopy (AFM). Depending on the metal-assisted chemical etching conditions, the macro-or microporous structures could be formed. Luminescence from metal-assisted chemically etched layers was measured. It was found that the PL intensity increases with increasing etching time. This behaviour is attributed to increase of the density of the silicon nanostructure. It was found the shift of PL peak to a green region with increasing of deposition time can be attributed to the change in porous morphology. Finally, the PL spectra of samples formed by high concentrated solution of AgNO 3 showed two narrow peaks of emission at 520 and 550 nm. These peaks can be attributed to formation of AgF and AgF 2 on a silicon surface.

show abstract

Highly efficient and stable luminescence of nanocrystalline porous silicon treated by high-pressure water vapor annealing

Cited by 175 publications

References 17 publications

Improvement of the Photoluminescence of Porous Si Powder via Oxidation in Organic Solvents

Improvement of the Photoluminescence of Porous Si Powder via Oxidation in Organic Solvents

Properties of magnetic nickel/porous-silicon composite powders

Peculiarities of Photoluminescence in Porous Silicon Prepared by Metal-Assisted Chemical Etching

Contact Info

Product

Resources

About