Enhancement of structural perfection of alkali halide single crystals by doping with copper

Daniel, D. Joseph; Ramasamy, P.; Madhusoodanan, U.; Bhagavannarayana, G.

doi:10.1016/j.jcrysgro.2012.05.005

Cited by 7 publications

(1 citation statement)

References 22 publications

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“…[10][11][12][13][14][15][16] In addition, recently, a great number of studies have been stimulated by alkali halides doped with metal ions like KCl:Ag, KCl:Au, NaCl:Cu, and KCl:Cu. [17][18][19] In the present paper, we investigate the doping effects of CuO nanocrystals on the structural and optical properties of the NaCl single crystals experimentally.…”

Section: Introductionmentioning

confidence: 99%

Structural and optical properties of a NaCl single crystal doped with CuO nanocrystals

Addala¹,

Bouhdjer²,

Chala³

et al. 2013

Chinese Phys. B

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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.

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