Photosensitive structures based on CdGa2Se4 single crystals

Photosensitive structures based on CdGa2Se4 single crystals have been fabricated for the first time: In/CdGa2Se4 surface-barrier structures and InSe/CdGa2Se4 heterostructures. The current-voltage characteristics and the quantum efficiency spectra of these structures were studied. The polarization photosensitivity of In/CdGa2Se4 structures were found. The photosensitivity is discussed taking into account the photoactive absorption in CdGa2Se4 crystals in the impurity-related and intrinsic spectral ranges. A conclusion has been made that CdGa2Se4 single crystals are promising for commercial applications in photoelectric converters of unpolarized and linearly polarized light.