Quaternary (FeIn2S4)x(MnIn2S4)1 − x alloys and photosensitive structures on their basis

Using directional crystallization of the melt of the (FeIn 2 S 4 ) x (MnIn 2 S 4 ) 1 − x alloy, homogeneous crystals of a similar atomic composition are grown over the entire range of compositions 1 ≥ x ≥ 0. It is established that the crystals of the continuous series of quaternary alloys in the range x = 0–1 crystallize in the spinel structure and lattice parameter a linearly depends on x . It is established that it is possible to obtain In(Al)/(FeIn 2 S 4 ) x (MnIn 2 S 4 ) 1– x photosensitive structures. Room-temperature spectra of relative quantum efficiency of photoconversion of the In(Al)/(FeIn 2 S 4 ) x (MnIn 2 S 4 ) 1 − x structures fabricated for the first time are obtained. From the analysis of these spectra, activation energies of direct and indirect band-to-band transitions for the crystals of the (FeIn 2 S 4 ) x (MnIn 2 S 4 ) 1– x alloys are determined and the dependence of these parameters on the composition of the position-disordered phases of mentioned alloys is discussed. It is concluded that the crystals of the (FeIn 2 S 4 ) x (MnIn 2 S 4 ) 1 − x alloys can be used in broadband photoconverters of optical radiation.