Abstract
Ternary chalcopyrite CuAlS2 and CuAlSe2 nanorods have been successfully synthesized through hydrothermal method at 180°C and their structure of prepared samples was investigated by X-ray diffraction pattern (XRD), scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HR-TEM). The structural, optical and morphology of the samples are found to depend on synthesizing time and temperature. HR-TEM analysis indicates that the rods like morphology were nearly homogeneous with average dimensions of about 273nm, 124nm in length and 24nm, 21nm in diameter for CuAlS2 and CuAlSe2 respectively. Vibrational modes of CuAlS2 and CuAlSe2 nanorods have been investigated by recording micro Raman spectra at room temperature. Optical properties of the synthesized samples were studied using photoluminescence (PL) spectra with excitation of 244nm at room temperature. The PL spectra show two emission peaks for CuAlS2 at 307nm (4.03eV) and 359nm (3.45eV). CuAlSe2 gives a prominent emission peak at 436nm (2.84eV).
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