Abstract
Large (50 mm long, 20 mm in diameter) CdP2 single crystals with tetragonal symmetry are grown by vapor-phase crystallization for the first time. The unit cell parameters of the single crystals are determined, and it is shown that they have the stoichiometric composition of cadmium diphosphide. Photosensitive In(Cu)/CdP2 structures are fabricated, and their photosensitivity spectra are investigated. It is found that these structures exhibit broadband photosensitivity. The mechanism of photoelectric conversion and the type of interband transitions are discussed. From indirect and direct interband transitions, the bandgap values that are responsible for edge absorption are determined. It is concluded that CdP2 single crystals are feasible for broadband optical converters.
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