FIZIKA A 5 (1996) 3, 127-132
ELECTRICAL CONDUCTION AND PHOTOCONDUCTION IN a-Se0.6Te0.4
NICOLAE TOMOZEIU and ION MUNTEANU
University of Bucharest, Faculty of Physics, PO Box 11-Mg, 5600, Romania
Received 21 January 1996
Revised manuscript received 19 July 1996
The DC conductivity and photoconductivity of a-Se0.6Te0.4 is
studied in the temperature range from 150 K to 300 K. From the temperature dependence of
the dark current, the thermal activation energy of 0.14 eV was obtained. The lux-ampere
characteristics at different temperatures and voltages between electrodes show that
photocurrent is proportional to the flux of light to the power g.
The activation energy of the carriers from dangling-bond levels was obtained from the
photocurrent variation with temperature.