A model for electroluminescence in SrS:Ce ACTFEL display devices

Author

Singh, Vijay P. ; Morton, David C.

Author_Institution

Dept. of Electr. Eng., Texas Univ., El Paso, TX, USA

Volume

39

Issue

6

fYear

1992

fDate

6/1/1992 12:00:00 AM

Firstpage

1331

Lastpage

1340

Abstract

An analytical model for electroluminescence in SrS:Ce AC thin-film electroluminescent display devices is presented. The model incorporates an exact calculation of the electric field and the effect of activator ionization and bulk traps. Activator ionization is needed to explain several features of luminescence behavior in SrS:Ce devices. These features include the second luminescence peak at the trailing edge of the voltage pulse and the time lag between the luminescence and the applied voltage when the applied voltage consists of bipolar trapezoidal pulses and rectangular pulses of low voltage amplitudes. As a mechanism for the ionization of activators, field-assisted tunneling is shown to be more likely than impact ionization by hot electrons. Physical processes are described in terms of rate equations, and field, current, and luminescence waveforms are calculated for one set of device parameters. The calculated and experimental luminescence waveforms agree

Keywords

cerium; electroluminescent displays; modelling; strontium compounds; AC thin-film electroluminescent display devices; SrS:Ce; activator ionization; blue emission; bulk traps; electric field; electroluminescence; field-assisted tunneling; luminescence waveforms; model; rate equations; second luminescence peak; time lag; Analytical models; Displays; Electric fields; Electroluminescent devices; Electron traps; Ionization; Low voltage; Luminescence; Thin film devices; Tunneling;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/16.137303

Filename

137303