Porous Silicon and Solar Cells

Dzhafaröv, T. D.

doi:10.1007/978-3-319-05744-6_95

Cited by 4 publications

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References 37 publications

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“…Porous silicon (PS), since its discovery [ 1 – 4 ], has had huge development for various applications, like gas sensors [ 5 ], solar cells [ 6 , 7 ], Bragg reflectors [ 8 ], biosensors [ 9 – 12 ], photocatalysis [ 13 ], tissue engineering [ 14 ], and cell growth [ 15 – 18 ], among others. Particularly, the last two applications have attracted researcher interest in studying the properties of PS as a host matrix Hydroxyapatite (HA) and its implementation in the development of processes leading to bone regeneration.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of porous silicon as hydroxyapatite host matrix of biomedical applications

et al. 2017

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In this work, porous-silicon samples were prepared by electrochemical etching on p-type (B-doped) Silicon (Si) wafers. Hydrofluoric acid (HF)-ethanol (C2H5OH) [HF:Et] and Hydrofluoric acid (HF)-dimethylformamide (DMF-C3H7NO) [HF:DMF] solution concentrations were varied between [1:2]—[1:3] and [1:7]—[1:9], respectively. Effects of synthesis parameters, like current density, solution concentrations, reaction time, on morphological properties were studied by scanning electron microscopy (SEM) and atomic force microscopy (AFM) measurements. Pore sizes varying from 20 nm to micrometers were obtained for long reaction times and [HF:Et] [1:2] concentrations; while pore sizes in the same order were observed for [HF:DMF] [1:7], but for shorter reaction time. Greater surface uniformity and pore distribution was obtained for a current density of around 8 mA/cm2 using solutions with DMF. A correlation between reflectance measurements and pore size is presented. The porous-silicon samples were used as substrate for hydroxyapatite growth by sol-gel method. X-ray diffraction (XRD) and SEM were used to characterize the layers grown. It was found that the layer topography obtained on PS samples was characterized by the evidence of Hydroxyapatite in the inter-pore regions and over the surface.

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