Quaternary [.sub.1 - x] alloys and photosensitive structures on their basis

Using directional crystallization of the melt of the [(Fe[In.sub.2][S.sub.4]).sub.x][(Mn[In.sub.2][S.sub.4]).sub.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)/ [(Fe[In.sub.2][S.sub.4]).sub.x][(Mn[In.sub.2][S.sub.4]).sub.1 - x] photosensitive structures. Room-temperature spectra of relative quantum efficiency of photoconversion of the In(Al)/ [(Fe[In.sub.2][S.sub.4]).sub.x][(Mn[In.sub.2][S.sub.4]).sub.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 [(Fe[In.sub.2][S.sub.4]).sub.x][(Mn[In.sub.2][S.sub.4]).sub.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 [(Fe[In.sub.2][S.sub.4]).sub.x][(Mn[In.sub.2][S.sub.4]).sub.1 - x] alloys can be used in broadband photoconverters of optical radiation. DOI: 10.1134/S1063782611070062