Synthesis and Luminescence Properties of Chalcopyrite-Type CuAlS2
Copper aluminum disulfide (CuAlS2) powders were synthesized in an evacuated ampoule at elevated temperatures. X-ray diffraction analysis revealed that the powders heated at temperatures higher than 800oC were single-phase CuAlS2. In the cathodoluminescence (CL) spectra measured at room temperature, the powders heated at temperatures higher than 600oC exhibited a visible emission peak at approximately 1.8 eV and a distinct ultraviolet emission peak at 3.45 eV. The powder heated at 700oC showed the maximum intensity of ultraviolet emission which is considered to be associated with excitons.
Masaru Miyayama, Tadashi Takenaka, Masasuke Takata and Kazuo Shinozaki
Y. Kuroki et al., "Synthesis and Luminescence Properties of Chalcopyrite-Type CuAlS2", Key Engineering Materials, Vol. 301, pp. 177-180, 2006