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Structure and properties of CaNb2O6:Sm3+ thin films by pulsed laser deposition

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Abstract

CaNb2O6:Sm3+ films were prepared on quartz glass and α-Al2O3(001) substrates by pulsed laser deposition. The structural, morphological, and optical properties of the CaNb2O6:Sm3+ films were characterized by X-ray diffraction (XRD), atomic force microscopy (AFM), emission-scan electron microscopy (SEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and photoluminescence spectroscopy (PL) measurements. The results show that the structure and properties of CaNb2O6:Sm3+ films were dependent on substrates. The CaNb2O6:Sm3+ films on Al2O3(0001) substrate have better crystallinity. The full-width at half-maximum (FWHM) of (131) peak are 0.45 and 0.32 for the CaNb2O6:Sm3+ film on glass and Al2O3(001), respectively. The crystallite size of CaNb2O6:Sm3+ films grown on glass and Al2O3(001) was about 8.22 and 9.98 nm, respectively. The oxidation state of the Sm element on the films was Sm3+ state. The photoluminescence (PL) spectra were measured at room temperature, the CaNb2O6:Sm3+ films on Al2O3(001) substrate have a better PL intensity, the identified emission bands were by the intra 4f transitions of Sm3+ from the excited level to the lower levels at 567 nm for 4G5/2→6H5/2 transition, at 609 nm for 4G5/2→6H7/2 transition, and at 657 nm for 4G5/2→6H9/2 transition.

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Acknowledgements

This work was supported by China Postdoctoral Science Foundation (No. 2012M511801), National Nature Science Foundation of China (No. 51072054, 51172078 and 51132004) and Science and technology project in Guangzhou (No. 2013J4100045).

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Authors and Affiliations

  1. Institute of Optical Communication Materials and State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China

    Yinzhen Wang, Liaolin Zhang, Renping Cao & Jianrong Qiu

  2. School of Physics & Telecommunication Engineering, South China Normal University, Guangzhou, 510631, PR China

    Yinzhen Wang & Qing Miao

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  1. Yinzhen Wang
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  2. Liaolin Zhang
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  3. Renping Cao
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Correspondence to Yinzhen Wang or Jianrong Qiu.

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Wang, Y., Zhang, L., Cao, R. et al. Structure and properties of CaNb2O6:Sm3+ thin films by pulsed laser deposition. Appl. Phys. A 115, 1365–1370 (2014). https://doi.org/10.1007/s00339-013-8011-x

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