Photodeposition of amorphous selenium films by the “selor” process I: Main features of the process, film structure

Naot

Perakh

1988

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Abstract:In this study, a model is developed to explain in microscopic terms the results obtained from thermally activated photoadsorption experiments in a-Se colloids. The observed compensation effect can be described for two different cases. At low efficiency adsorption, the process is controlled by the potential at the boundary layer. In the high efficiency adsorption case, the process is controlled by diffusion transport.

Section: Experimental Kinetics Of Spmentioning

confidence: 99%

“…2). The SP process GL 461 is characterized by several stages of photoadsorption of the colloid particles onto foreign substrates [3] (Fig. 2).…”

Section: Experimental Kinetics Of Spmentioning

confidence: 99%

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On the theory of photoadsorption kinetics of a-Se colloids: The thermal activation energy and compensation effect

Naot

Perakh

1988

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“…a is given in the absorption vavelength region, ;t < 450 (nm) by the following approximations: O~ = a'abs = Oabs" N (1) and in the scattering wavelength region, i. e.: 3, > 600 nm by: where o~bs and o ..... are the cross sections for light absorption and scattering respectively; N the concentration of colloid particles, a is a measurable quantity through:…”

Section: Lightoffmentioning

confidence: 99%

“…Previous papers [1,2,3,4,5] describe the surface photodeposition process (SP). This process allows one to obtain a-Se thin films from a photoacfivated colloid hydrosol.…”

Section: Introductionmentioning

confidence: 99%

Volume photodeposition processes in amorphous selenium hydrosols

1984

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A photodeposition process adapted to the preparation of thin fillS of amorphous Selenium (a-Se) has been investigated previously. This communication gives the results of kinetic experiments performed on the a-Se-hydrosol under photoexcitation. The investigation reveals two distinct effects occurring in the bulk of the irradiated hydrosol i. e., photoprecipitation and photocoagulation. This result allows us to enhance our understanding of the photodeposition process.

A phenomenological model of photoprecipitation in a-Se colloid solutions

Naot

1987

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An attempt has been made in this study to develop a physical model for the photoprecipitation and photoaggregation effects in amorphous Se (a-Se) colloids. The theory explains in basic terms the experimental time dependence of the precipitated elemental Se concentration. Several kinetic parameters were evaluated by correlating the experiment to theory, subject to strong light intensity and narrow beam approximations. The results were used to quantify and clarify several further features of photoprecipitation in a phenomenological way.