Photoelectric Properties of MnIn2S4 Crystals

The spectral distribution of the photoconductivity and the temperature dependence of the photocurrent of MnIn 2 S 4 single crystals were investigated. The intrinsic and impurity photoconductivities as well as a maximum at energy 2.69 eV, which is associated with the intracenter transition of Mn 2+ ions ( 6 A 1 → 4 A 1 ), were found in the photoconductivity spectrum. The wavelength region 600–1000 nm appears with an excess of manganese in the crystals and is caused by a donor defect. The increase in the photocurrent at 80–145 K is associated with thermal depletion of the adhesion levels. The activation energy of the adhesion levels was determined.