This article is cited in 24 papers

Semiconductor structures, low-dimensional systems, quantum phenomena

Quaternary (FeIn$_2$S$_4$)$_x$(MnIn$_2$S$_4$)$_{1-x}$ alloys and photosensitive structures on their basis

I. V. Bondar'^a, V. Yu. Rud'^b, Yu. V. Rud'^c, D. V. Lozhkin<sup>a

a</sup> Belarussian State University of Computer Science and Radioelectronic Engineering
^b St. Petersburg Polytechnic University
^c Ioffe Institute, St. Petersburg

Abstract: 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 $\ge x\ge$ 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.

 English version: Semiconductors, 2011, 45:7, 912–916

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