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Effect of doping ion concentration on the photoluminescence behavior of CdWO4:Tb3+ phosphor synthesized via co-precipitation method

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Abstract

In this paper, the photoluminescence properties of Tb3+ doped CdWO4 synthesized via co-precipitation method have been reported. The structural property of the prepared samples was determined by XRD and it was found that all the samples are crystallized in monoclinic structure without any impurity phases. The diameter of the crystallites observed from TEM studies for CdWO4:Tb3+ (5 at.%) were extended in the ranges of 10-30 nm. Photoluminescence studies exhibited a broad excitation band corresponding to the charge transfer transition between filled 2p orbital of O2− and empty 5d orbital of W6+ within the WO66− group. Upon excitation at 275 nm by UV light, the prepared samples showed a group of sharp and narrow emission peaks characteristic to the f–f transitions of Tb3+ with dominant intensity at 545 nm due to 5D4-7F5 transition. The emission intensity increases with the increase in Tb3+ concentration up to 7 at.% and then decreases upon further increase in Tb3+ concentration, which is due to concentration quenching effect. The decay time of the prepared samples were investigated in detail and the maximum life time value is found to be 1.079 ms in this study.

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Acknowledgement

The authors are very thankful to sophisticated analytical instrument facility (SAIF), north eastern hill university (NEHU) Shillong, India for providing TEM facility.

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Authors and Affiliations

  1. Department of Chemistry, Mizoram University (MZU), Aizawl, 796004, India

    N. Premjit Singh, N. Ramananda Singh & N. Mohondas Singh

  2. Department of Chemistry, Manipur University, Canchipur, 795003, India

    N. Rajmuhon Singh

  3. Department of Chemistry, A. R. S. D. College, University of Delhi, New Delhi, 110021, India

    N. Premjit Singh

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  1. N. Premjit Singh
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  2. N. Ramananda Singh
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  3. N. Rajmuhon Singh
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  4. N. Mohondas Singh
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Correspondence to N. Mohondas Singh.

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Singh, N.P., Singh, N.R., Singh, N.R. et al. Effect of doping ion concentration on the photoluminescence behavior of CdWO4:Tb3+ phosphor synthesized via co-precipitation method. Indian J Phys 92, 1461–1466 (2018). https://doi.org/10.1007/s12648-018-1219-z

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  • DOI: https://doi.org/10.1007/s12648-018-1219-z

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