Showing papers by "Leigh T. Canham published in 1997"
TL;DR: A large amount of work world wide has been directed towards obtaining an understanding of the fundamental characteristics of porous Si as mentioned in this paper, and the key importance of crystalline Si nanostructures in determining the behaviour of porous si is highlighted.
Abstract: A large amount of work world-wide has been directed towards obtaining an understanding of the fundamental characteristics of porous Si. Much progress has been made following the demonstration in 1990 that highly porous material could emit very efficient visible photoluminescence at room temperature. Since that time, all features of the structural, optical and electronic properties of the material have been subjected to in-depth scrutiny. It is the purpose of the present review to survey the work which has been carried out and to detail the level of understanding which has been attained. The key importance of crystalline Si nanostructures in determining the behaviour of porous Si is highlighted. The fabrication of solid-state electroluminescent devices is a prominent goal of many studies and the impressive progress in this area is described.
2,371 citations
Book•
01 Jan 1997
TL;DR: In this paper, the authors present a collection of 50 commissioned essays on the subject from scientists in Europe, America and Japan, with the focus on the luminescence of silicon chips.
Abstract: Porous silicon has been the focus of much research activity in recent years, in view of its luminescence, which may enable light emitting devices to be integrated with silicon chips. This work comprises over 50 commissioned essays on the subject from scientists in Europe, America and Japan .
775 citations
TL;DR: In this paper, the authors demonstrate and discuss how the bioactivity of porous silicon films might be tailored by manipulation of layer microstructure, chemical composition, and surface electrical charge, suggesting that silicon bio-chips might be developed that could rapidly bond in-vivo with living tissue and bone.
78 citations
TL;DR: In this paper, Loni et al. report on the factors that might affect the stability of the device, such as operating environment, choice of contact materials, localised electrical breakdown, contact diffusion and surface passivation of the porous silicon.
24 citations
TL;DR: In this paper, blue photoluminescence is observed, with nanosecond decay time, from rapid thermally oxidized porous silicon as a result of accelerated aging in plastic containers, which is a consequence of the incorporation of trace organic (hydrocarbon) contamination from the plastic containers as they outgas at a mildly elevated temperature (80°C) and, albeit at a reduced rate, at room temperature.
Abstract: Blue photoluminescence is observed, with nanosecond decay time, from rapid thermally oxidized porous silicon as a result of accelerated aging in plastic containers. Photoluminescence measurements, combined with chemical analyses of the “aged” porous silicon, indicate that the emission is a consequence of the incorporation of trace organic (hydrocarbon) contamination from the plastic containers as they outgas at a mildly elevated temperature (80 °C) and, albeit at a reduced rate, at room temperature. Such carbonaceous contaminants can subsequently be removed by high-temperature annealing, a process which also quenches the blue photoluminescence. Consequently, it is important to take into consideration the storage medium used when making comparative luminescent and compositional studies of porous silicon and, perhaps, porous materials in general.
20 citations
Book•
01 Jan 1997
TL;DR: Porosity properties of porous silicon have been investigated in a variety of applications, such as: preparation of a chemically modified porous silicon, characterization of a related silicon nanostructures related porous materials, and the multilayers optoelectronic properties of Psilicon as discussed by the authors.
Abstract: Preparation of porous silicon chemically modified porous silicon behaviour of porous silicon in liquids characterization of porous silicon related silicon nanostructures related porous materials porous silicon multilayers optoelectronic properties of porous silicon new applications of porous silicon.
4 citations
TL;DR: In this article, the location and type of the hydrogen within the nanostructure of porous silicon (PS) are discussed in terms of the structure dimensionality, and the presence of hydrogen in bulk crystalline and amorphous silicon is well-known.
2 citations