Journal ArticleDOI
Discussion on the mechanism of photodoping
TLDR
Based on a series of experimental results, a model for photodoping was proposed in this paper, and the square root dependence for the growth of the photodoped depth with exposure time was explained in the light of this proposed model.Abstract:
The photo-enhanced reaction between metallic silver and vitreous chalcogenides is known as “photodoping”. Based on a series of experimental results, a model for photodoping was proposed. It was assumed in this model, that a junction barrier at the silver-chalcogenide interface worked for separating photocarriers. Holes are captured by metallic silver, and electrons are trapped by active or loosely bound chalcogen atoms after travel toward the interior of a glass layer. The Coulomb attraction field between ions thus formed is large enough to overcome the kinetic barrier in the process of silver diffusion. The square root dependence for the growth of the photodoped depth with exposure time has been explained in the light of this proposed model.read more
Citations
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Journal ArticleDOI
Photodoping of amorphous chalcogenides by metals
A.V. Kolobov,S.R. Elliott +1 more
TL;DR: In this article, the results of experimental investigations of the photodoping of amorphous chalcogenides by metals, and in particular by silver, are reviewed, and the results in the literature are analysed, giving answers to such fundamental questions as the following: where is the actinic light which is efficient for photodissolution absorbed? Which is the diffusion-limiting step? What is the state of the diffusing species (neutral atoms or ions)?
Journal ArticleDOI
Photo-induced structural and physico-chemical changes in amorphous chalcogenide semiconductors
TL;DR: In this article, the photo-dissolution of chalcogenide glasses is classified and described, with particular emphasis on the photo dissolution effect, and the detailed mechanisms responsible for many of these processes are still unknown, although in the case of photo-darkening in annealed a-As2S3 films, Raman experiments indicate that a light-induced change in the bond distribution from that for a chemically ordered network towards one characteristic of a random network may be the principal cause.
Journal ArticleDOI
Broken chemical order and phase separation in GexSe1−x glasses
TL;DR: In this paper, the composition dependence of site populations determined by Mossbauer spectroscopy can be quantitatively understood in terms of molecular phase separation in GexSe1−x glasses.
Journal ArticleDOI
Silver photodissolution in amorphous chalcogenide thin films
TL;DR: In this paper, the authors investigated the main theories reported through the use of the following compounds: AsS x, AsSe x, and GeSe x.5 films that were flash evaporated or deposited by plasmaenhanced chemical vapour deposition.
Journal ArticleDOI
Photoenhanced dissolution and lateral diffusion of Ag in amorphous AsS layers
TL;DR: In this article, the photoenhanced dissolution and lateral diffusion of Ag in As2S3 layers was measured and it was found that the lateral diffusion depends on temperature, composition of the layers, intensity of illumination and also on electrical conductivity of the substrate.
References
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Journal ArticleDOI
Photostructural transformations in amorphous As2Se3 and As2S3 films
TL;DR: In this article, the influence of illumination and annealing on thin films of amorphous As2Se3 and As2S3 has been studied through their effects on the structure and optical properties.
Journal ArticleDOI
The Photo-doping of Metals into Solids for New-type Imaging Systems
Journal ArticleDOI
The Optical and Electrical Properties of Metal Photodoped Chalcogenide Glasses
TL;DR: In this paper, the optical and electrical properties of photo-doped chalcogenide glasses were studied and the results indicated that the metals photodoped in the glasses behaved as structural modifiers of the glasses, and that the state of density in the gap was increased by the metal photodoping.
Journal ArticleDOI
On the Structure of Glasses in the System As-S
Shoji Tsuchihashi,Yoji Kawamoto +1 more
TL;DR: As2Sx(x>3) as discussed by the authors, As2S3, As2As(x > 3) and As-As(As-As) 2.