Time dependent analysis of an ion-implanted GaAs OPFET

Author

Pal, B.B. ; Chattopadhyay, S.N. ; Mishra, Sunita ; Singh, S. ; Khan, R.U.

Author_Institution

Dept. of Electron. Eng., Banaras Hindu Univ., Varanasi, India

Volume

41

Issue

4

fYear

1994

fDate

4/1/1994 12:00:00 AM

Firstpage

491

Lastpage

498

Abstract

A time-dependent analysis of the electrical characteristics of an ion implanted GaAs optical field effect transistor (OPFET) has been carried out. Both the cases of light turning on and off at a reference time t=0 have been considered. The photovoltaic effect across the Schottky junction and the depletion width modulation in the active layer have been taken into account. The threshold voltage, channel charge, channel conductance, drain-source current, transconductance, and gate-source capacitance of the device under light turning on and off conditions have been evaluated. When light is turned on, all the parameters increase with time before reaching the steady-state value and when light is turned off, these parameters decrease with time and reach their respective values corresponding to dark condition. The time under on condition is less than that under off condition

Keywords

Schottky gate field effect transistors; equivalent circuits; gallium arsenide; ion implantation; phototransistors; photovoltaic effects; semiconductor device models; GaAs; Schottky junction; active layer; channel charge; channel conductance; dark condition; depletion width modulation; drain-source current; electrical characteristics; gate-source capacitance; illumination condition; ion-implanted GaAs OPFET; optical field effect transistor; photovoltaic effect; threshold voltage; time-dependent analysis; transconductance; Capacitance; Electric variables; FETs; Gallium arsenide; Optical modulation; Particle beam optics; Photovoltaic effects; Threshold voltage; Transconductance; Turning;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/16.278500

Filename

278500