Quaternary (FeIn2S4)x(MnIn2S4)1-x Alloys and Photosensitive Structures on Their Basis

Using directional crystallization of the melt of the (FeIn2S4)(x)(MnIn2S4)(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)/(FeIn2S4)(x)(MnIn2S4)(1-x) photosensitive structures. Room-temperature spectra of relative quantum efficiency of photoconversion of the In(Al)/(FeIn2S4)(x)(MnIn2S4)(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 (FeIn2S4)(x)(MnIn2S4)(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 (FeIn2S4)(x)(MnIn2S4)(1) (x) alloys can be used in broadband photoconverters of optical radiation. DOI: 10.1134/S1063782611070062