中国物理B ›› 2013, Vol. 22 ›› Issue (9): 98103-098103.doi: 10.1088/1674-1056/22/9/098103
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
S. Addalaa, L. Bouhdjera, A. Chalab, A. Bouhdjarb, O. Halimia, B. Boudinea, M. Sebaisa
S. Addalaa, L. Bouhdjera, A. Chalab, A. Bouhdjarb, O. Halimia, B. Boudinea, M. Sebaisa
摘要: A cupric oxide (CuO) nanocrystal-doped NaCl single crystal and a pure NaCl single crystal are grown by using the Czochralski (Cz) method. A number of techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, Fourier transform infrared (FT-IR) spectroscopy, Raman spectroscopy, optical absorption in the UV-visible range, and photoluminescence (PL) spectroscopy are used to characterize the obtained NaCl and NaCl:CuO crystals. It is observed that the average radius of CuO crystallites in NaCl:CuO crystal is about 29.87 nm, as derived from the XRD data analysis. Moreover, FT-IR and Raman spectroscopy results confirm the existence of the monoclinic CuO phase in NaCl crystal. UV-visible absorption measurements indicate that the band gap of the NaCl:CuO crystal is 434 nm (2.85 eV), and it shows a significant amount of blue-shift (ΔEg=1 eV ) in the band gap energy of CuO, which is due to the quantum confinement effect exerted by the CuO nanocrystals. The PL spectrum of the NaCl:CuO shows a broad emission band centred at around 438 nm, which is consistent with the absorption measurement.
中图分类号: (Methods of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)