RECEPTORI DE RADIAŢIE PE FILME MONOCRISTALINE DE InSe

Igor EVTODIEV Catedra Meteorologie, Metrologie şi Fizică Experimentală

Abstract

In this work the possibility of elaboration of the radiation receptors based on InSe is demonstrated. Particularly the roentgen resistors, spectral and polarizational photoresistors based on layered InSe are studied. The doping of the InSe crystals with 0.1%at. of Cu leads to the growth of ~8 time of the photosensibility in the UV region (hν>3,0 eV) comparing to the InSe photoresistor. None equilibrium charge carriers in the photoresistor based on monocrystalline InSe is recombining through two recombinatory levels with live times τ1 = 30·10-5 s, τ1 = 9,2·10-5 s. In the InSe with 0.1%at. Cu photoresistor photocurrent in the dark is decreasing accordingly to a single exponent with characteristic time 1,12·10-14 s. Compounds of type InSe that are strongly mechanic and optic anisotropic and doped with Cu and Cd are serving as base for the preparation of the photoreceptors with polarizational sensibility with narrow spectral band. From the dependences of the intensity of the currents depending of the X radiation dose in the probes InSe< Cd 0,05 % at.> is observed a sublinear tendency for I-U characteristics, which indicates a growth of the concentration of the defects in the InSe crystals together the the growth of the radiation dose. The formation process of the defects is an inertial one and for the InSe<Cd> is reaching a stationary size during ~30÷35s.