SEM and HRTEM study of porous silicon—relationship between fabrication, morphology and optical properties

Dian, J.; Macek, A.; Nižňanský, Daniel; Němec, Ivan; Vrkoslav, Vladimír; Chvojka, T; Jelı́nek, Ivan

doi:10.1016/j.apsusc.2004.05.218

Cited by 61 publications

(32 citation statements)

References 10 publications

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“…The peak of emission is observed at 650 nm, and the band gap is 1.91 eV. The reason of increasing PL peak can be understood by quantum confinement mechanism [31,32]. Based on that, decreasing of Si size with increasing current density is revealed in monotonous blue shift of PL maximum at room temperature.…”

Section: Methodsmentioning

confidence: 98%

Synthesis of SnO2 nanostructures employing Nd:YAG laser

et al. 2015

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SnO 2 nanostructures have been prepared on quartz and porous silicon (PS) substrates using rapid photothermal oxidation at 600°C and different oxidation times. The analysis and characterizations were researched. The photovoltage properties of Au/n-SnO 2 /p-PSi/c-Si solar cell are investigated under irradiation of Nd:YAG laser pulses. The PS is synthesized on single crystalline p-type Si using electrochemical etching in aqueous hydrofluoric acid at current density 25 mA/cm 2 for 30 min etching time. The photovoltage properties are found to be depended on laser flounces.

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Section: Methodsmentioning

confidence: 98%

Synthesis of SnO2 nanostructures employing Nd:YAG laser

et al. 2015

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“…After the etching process, the samples were washed into absolute ethanol solution and deionized water again, then they were dried oven for tests. The surface morphology was studied with Zeiss EVO MA10 (Carl-Zeiss, Germany) scanning electronic microscope (SEM) [16] .…”

Section: Methodsmentioning

confidence: 99%

Microstructure Fabricated by Monocrystalline Silicon Anisotropic Etching in Sodium Carbonate and Sodium Bicarbonate Solutions

Ma¹,

Luo²,

Wang³

et al. 2015

Proceedings of the 2015 International Conference on Electromechanical Control Technology and Transportation

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Abstract. The fabrication method of microstructure for monocrystalline silicon wafers based on a mixture of sodium carbonate and sodium bicarbonate solutions under different conditions has been studied in this work. The texturization process has been evaluated in terms of the surface morphology size and the coverage rate. The experiments show that the influence of Na 2 CO 3 concentration is significant by varying the concentration between 5 wt% and 30 wt%. It was shown that with the concentration of Na 2 CO 3 changing, the average size of pyramidal varies from 1.20 μm to 2.44 μm. In a word, the surface were not uniform and exhibited wide bright zones in which the texturization process was not successful. However, we find it possible to get a better pyramid structure by the addition of NaHCO 3 . Uniform microstructure in the wafers of monocrystalline silicon were formed with 20 wt% sodium carbonate and 5 wt% sodium bicarbonate at 90 °C for 20 min. Under optimized conditions, the textured silicon wafers surface exhibit a lower average size (about 0.96 μm) and the coverage rate is high.

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“…It demonstrates rather bright photoluminescence (PL) in the visible spectral range [4]. Pores in por-Si can be extended from several nm to several dozens of μm and they are usually arranged perpendicular to the surface of the Si substrate [5].…”

mentioning

confidence: 99%

Electron structure of iron and cobalt nanocomposites on the basis of porous silicon

Кашкаров

Lenshin

Agapov

et al. 2009

Phys. Status Solidi (c)

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Morphology and phase composition of porous silicon with electrochemically deposited Fe and Co particles as well as the particles of their mixtures were investigated by scanning electron microscopy (SEM) and X‐ray emission and absorption spectroscopy. Iron was shown to cover the surface of porous silicon while cobalt penetrates inside the pores in the form of nanoparticles. Iron Iron is present in the form of the phase of Fe2O3 with an admixture of FeO and Fe3O4. Cobalt forming nanoparticles is involved as metallic Co and Co2O3. Under co‐deposition of these metals from solution of their salts mixture cobalt favored penetration of iron inside the pores. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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SEM and HRTEM study of porous silicon—relationship between fabrication, morphology and optical properties

Cited by 61 publications

References 10 publications

Synthesis of SnO2 nanostructures employing Nd:YAG laser

Synthesis of SnO2 nanostructures employing Nd:YAG laser

Microstructure Fabricated by Monocrystalline Silicon Anisotropic Etching in Sodium Carbonate and Sodium Bicarbonate Solutions

Electron structure of iron and cobalt nanocomposites on the basis of porous silicon

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