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Photoconductive cells from screenprinted and sintered cadmium sulfoselenide

Photoconductive cells from screenprinted and sintered cadmium sulfoselenide Purpose Screenprinting is an appropriate technique for the manufacture of largearea positionsensitive detectors. The purpose of this paper is to present simple methods of paste preparation and appropriate processing of thick films.Designmethodologyapproach Active layers of photoconductive cells based on doped CdS0.32Se0.68 were prepared by screenprinting and sintering at 530C. A sulfideselenide mixture or a mixed crystal material and propylene glycol PG was deposited as a paste. PG served as the temporary paste binder. Cadmium chloride was used as a fluxing agent and a donor source. CopperII chloride was used as an acceptor source. The effect of the paste composition and sintering time on the resistance and slope of the resistance vs illumination dependence of cells was investigated. These parameters were checked again after eight years of cell storage.Findings The cell properties are considerably influenced by the time periods between printing, drying, and sintering. Addition of 2.3mg Cu2and 17mg Cl per 1g of mixed crystal CdS0.32Se0.68 enables the preparation of photoconductive cells with the slope higher than 1.2 and a very good longterm stability of cell parameters.Research limitationsimplications The effect of the cell parameters' dependence on the paste, age and the time between printing and sintering rendered it impossible to make a more detailed examination after eightyear storage of samples.Originalityvalue The paper is of value in showing that in the prepared cells exhibit high slopes of resistanceillumination dependence. The high slope enables detection of laser pulses using only simple filtration of ambient illumination. The changes in photoconductive cell properties after eightyear storage are presented. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Microelectronics International Emerald Publishing

Photoconductive cells from screenprinted and sintered cadmium sulfoselenide

Microelectronics International , Volume 25 (3): 6 – Jul 25, 2008

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
1356-5362
DOI
10.1108/13565360810889629
Publisher site
See Article on Publisher Site

Abstract

Purpose Screenprinting is an appropriate technique for the manufacture of largearea positionsensitive detectors. The purpose of this paper is to present simple methods of paste preparation and appropriate processing of thick films.Designmethodologyapproach Active layers of photoconductive cells based on doped CdS0.32Se0.68 were prepared by screenprinting and sintering at 530C. A sulfideselenide mixture or a mixed crystal material and propylene glycol PG was deposited as a paste. PG served as the temporary paste binder. Cadmium chloride was used as a fluxing agent and a donor source. CopperII chloride was used as an acceptor source. The effect of the paste composition and sintering time on the resistance and slope of the resistance vs illumination dependence of cells was investigated. These parameters were checked again after eight years of cell storage.Findings The cell properties are considerably influenced by the time periods between printing, drying, and sintering. Addition of 2.3mg Cu2and 17mg Cl per 1g of mixed crystal CdS0.32Se0.68 enables the preparation of photoconductive cells with the slope higher than 1.2 and a very good longterm stability of cell parameters.Research limitationsimplications The effect of the cell parameters' dependence on the paste, age and the time between printing and sintering rendered it impossible to make a more detailed examination after eightyear storage of samples.Originalityvalue The paper is of value in showing that in the prepared cells exhibit high slopes of resistanceillumination dependence. The high slope enables detection of laser pulses using only simple filtration of ambient illumination. The changes in photoconductive cell properties after eightyear storage are presented.

Journal

Microelectronics InternationalEmerald Publishing

Published: Jul 25, 2008

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