Photoconductive cells from screen‐printed and sintered cadmium sulfoselenide

Jiří Franc (J. Heyrovský Institute of Physical Chemistry of the Academy of Sciences of the Czech Republic, Prague, Czech Republic)
Stanislav Nešpůrek (Institute of Macromolecular Chemistry of the Academy of Sciences of the Czech Republic, Prague, Czech Republic)

Microelectronics International

ISSN: 1356-5362

Publication date: 25 July 2008

Abstract

Purpose

Screen‐printing is an appropriate technique for the manufacture of large‐area position‐sensitive detectors. The purpose of this paper is to present simple methods of paste preparation and appropriate processing of thick films.

Design/methodology/approach

Active layers of photoconductive cells based on doped CdS0.32Se0.68 were prepared by screen‐printing and sintering at 530°C. A sulfide‐selenide 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. Copper(II) 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 2.3 mg Cu2 + and 17 mg Cl per 1 g of mixed crystal CdS0.32Se0.68 enables the preparation of photoconductive cells with the slope higher than 1.2 and a very good long‐term stability of cell parameters.

Research limitations/implications

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 eight‐year storage of samples.

Originality/value

The paper is of value in showing that in the prepared cells exhibit high slopes of resistance‐illumination dependence. The high slope enables detection of laser pulses using only simple filtration of ambient illumination. The changes in photoconductive cell properties after eight‐year storage are presented.

Keywords

Citation

Franc, J. and Nešpůrek, S. (2008), "Photoconductive cells from screen‐printed and sintered cadmium sulfoselenide", Microelectronics International, Vol. 25 No. 3, pp. 41-46. https://doi.org/10.1108/13565360810889629

Download as .RIS

Publisher

:

Emerald Group Publishing Limited

Copyright © 2008, Emerald Group Publishing Limited

Please note you might not have access to this content

You may be able to access this content by login via Shibboleth, Open Athens or with your Emerald account.
If you would like to contact us about accessing this content, click the button and fill out the form.
To rent this content from Deepdyve, please click the button.