Abstract

In recent years the interest in hybrid bistable devices has increased rapidly because of the possibility of using these properties for optical computing systems. Therefore we investigate optoelectronic features of various CdS layers, pointing out especially the bistability in photoconduction presented by thermo-optical hysteresis. We grow our thin (2–10-μm) CdS layers on various substrates (glass, Pyrex, and CaF2) by three methods: evaporation, close-spaced vapor transport, and spray deposition. By means of x-ray diffraction, transmission, and secondary-ion mass-spectroscopy measurements, we analyze the crystal structure, the slope of the absorption edge (which is important in attaining bistable behavior), and the impurities of our samples. From photocurrent measurements we determine the free-carrier lifetime, the photoconductivity gain, and the sensitivity of the layers. In this context a new theory is presented that gives the ratio of the surface recombination time to the free-carrier lifetime. We are most successful in exploring thermo-optical hysteresis in the case of sprayed layers. To our knowledge, this is the first case in which a room-temperature sprayed-film self-electro-optic-effect device presents the best-resolved thermo-optical hysteresis, especially in photoconductivity, when compared with recent measurements.

© 1991 Optical Society of America

Full Article  |  PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (13)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (28)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription