Adaptive photo-EMF detectors based on CdTe and their solid solutions
The complex measurements of V(Ti)-doped CdTe (crystals and films) and their solid solutions were carried out. This allowed to establish the nature and energy structure of the intrinsic defects and impurity centers and to propose the micromechsnism of photo-EMF effect. The adaptive photodetectors based on these crystals and CdTe polycrystalline films were developed.
High sensitivity detection of laser ultrasound by photorefractive CdTe:Ti under an applied ac field
The performance of a laser ultrasound receiver based on two-wave mixing in titanium doped cadmium telluride crystals under an applied ac field is described. High sensitivity and fast response time is achieved using a low-power laser.
A comparative electron paramagnetic resonance study of vanadium in n-type, semi-insulating and p-type CdTe
A quantitative electron paramagnetic resonance (EPR) study of vanadium-related defects in semi-insulating and co-doped p-type and n-type bulk CdTe:V shows the VCd donor to be the dominant electrically and optically active defect in semi-insulating photorefractive material. The effective trap density of 4*1015 cm-3 for the VCd0+/ defect, determined by quantitative EPR spectroscopy, is in agreement with the value obtained from photorefractive measurements on the same crystals. A comparison of the total V content with the VCd donor concentration indicates the existence of additional V-related defects not observed in EPR. Surprisingly the neutral donor state, VCd0, is not observed by EPR in the n-type material. No other V-related defects were detected in the n- or p-type material.