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Synthesis and characterization of red emission phosphor NaY(WO4)2:Eu3+ with La3+-doped

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Abstract

A series of novel red-emitting Na(LaxEuyY1−x−y)(WO4)2 phosphors were successfully synthesized using the high-temperature solid-state method. The crystal structure and morphology of the phosphor were characterized by XRD, SEM and infrared absorption spectroscopy. Because of the larger ionic radius and stronger polarizability of La3+, the W–O bond length is changed and the lattice is enlarged. The energy band structure of the phosphor was calculated and estimated by using the Density functional theory. The band gap energy of NaLa(WO4)2 host is 4.51 eV, which is greater than the 4.44 eV of NaY (WO4)2 host. The excitation spectra and emission spectrum of the sample were tested, which confirmed that the introduction of La3+ ions changed the energy transfer mechanism of the phosphor. The 5D0 level radiative transition lifetime and CIE chromaticity coordinates of the samples were calculated. The experimental results show that La3+ do** can change the energy transfer process of Eu3+, and then realize the regulation of red emission.

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Data availability

The datasets generated during and/or analysed during the current study are not publicly available due [them containing information that could compromise research participant privacy/consent] but are available from the corresponding author on reasonable request.].

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Acknowledgements

This work was supported by Science and Technology Planning Project of Zhejiang Province, China (Grant No. 2018C01046), Enterprise-funded Latitudinal Research Projects (Grant Nos. J2020-289; J2021-168; J2021-189; J2021-271; J2021-272), Sponsored by Shanghai Sailing Program (Grant No. 18YF1422500) and Research Start-up Project of Shanghai Institute of Technology (Grant No. YJ2018-9).

Funding

This work was supported by Science and Technology Planning Project of Zhejiang Province, China (Grant No. 2018C01046), Enterprise-funded Latitudinal Research Projects (Grant Nos. J2020-289; J2021-168; J2021-189; J2021-271; J2021-272), Sponsored by Shanghai Sailing Program (Grant No. 18YF1422500) and Research Start-up Project of Shanghai Institute of Technology (Grant No. YJ2018-9).

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Authors and Affiliations

  1. School of Science, Shanghai Institute of Technology, Shanghai, 201418, People’s Republic of China

    Qiyuan Du, Bobo Yang, Ganghua Zheng, Chunfeng Guo & Jun Zou

  2. College of Physics and Information Engineering, Fuzhou University, Fuzhou, 350100, China

    Aochen Du

  3. National Semiconductor Lighting Application System Engineering Technology Research Center, Shanghai, 201418, People’s Republic of China

    Jun Zou

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  1. Qiyuan Du
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by [QD], [AD], [AD], [BY], [GZ], [CG] and [JZ]. The first draft of the manuscript was written by [QD] and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Bobo Yang or Jun Zou.

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Du, Q., Du, A., Yang, B. et al. Synthesis and characterization of red emission phosphor NaY(WO4)2:Eu3+ with La3+-doped. J Mater Sci: Mater Electron 33, 13207–13216 (2022). https://doi.org/10.1007/s10854-022-08260-3

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