Abstract
CuClSe 2 was synthesized by solid-state reaction between copper chloride and selenium at 300 °C. CuClSe 2 thin film was prepared on a glass substrate by pulsed laser deposition (PLD) method. XRD (X-ray diffraction) analysis revealed that the CuClSe 2 thin film has a preferred surface orientation parallel to (006). The transmittance and reflectance spectra of the film indicated that the compound is an indirect band gap material; the energy band gap is about 1.45 eV; its absorption coefficients are in the range of 10 4–10 5 cm − 1 when the wavelength is shorter than 720 nm. The melting point of CuClSe 2 is about 328 °C. These results show that CuClSe 2 is a potential absorber layer material applied in solar cells.
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