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Upconversion luminescence and time decay study of Yb–Er-doped BaWO4 nanophosphor

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Abstract

Rare earth-doped phosphor materials have always remained in focus for excellent luminescence properties. Herein we have synthesized Yb3+ and Er3+-doped BaWO4 nanophosphor via facile hydrothermal method with red and green region emissions by 980 nm excitation. Red and green region emissions were observed due to 4F9/2 → 4I15/2 and 2H11/2/4S3/2 → 4I15/2 transitions, respectively, of Er3+, where Yb3+ acts as a sensitizer. The sample characterization was done using X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Transmission Electron Microscopy (TEM), and X-ray Photoelectron Spectroscopy (XPS) techniques. The consequences of different concentrations of activator ion (Er3+) in BaWO4: Yb3+, Er3+ were studied from luminescence perspective in detail. The intensity of overall emission varied with altering the power of excitation that influences the photon transfer pathways. It was found that two-photon processes control both red and green emissions in the upconversion process. Decay behavior for both the emission was investigated. Thus, the tunable photoluminescence property suggests its potential in optoelectronic applications.

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Acknowledgements

UKG acknowledges the Teachers Associateship for Research Excellence (TARE) fellowship and research grant (TAR/2018/000763) of SERB, Govt. of India and thanks the TARE project mentor Prof. A. J. Pal, IACS-Kolkata. UKG acknowledges the central DST-FIST program (SR/FST/College-287/2015) for financial support. UKG thanks the DBT Star College Scheme (BT/HRD/11/036/2019) for funding. UKG also acknowledges Science & Technology and Biotechnology Department, Govt. of West Bengal for providing the financial support [199 (Sanc.)/ST/P/S&T/6G-12/2018]. SD acknowledges the SERB for providing financial support (EEQ/2019/000401). SP gratefully thank SERB, Govt. of India for providing the junior research fellowship (JRF). SD and UKG wish to thank Science & Technology and Biotechnology Department, Govt. of West Bengal for providing the financial support (ST/P/S&T/6G-6/2019). AA thanks Science & Technology and Biotechnology Department, Govt. of West Bengal for JRF.

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Author notes

  1. Arnab Kumar Dey

    Present address: Department of Materials Science and Engineering, IIT Delhi, Delhi, 110016, India

  2. Bibek Samanta

    Present address: Department of Metallurgical Engineering & Materials Science, IIT Bombay, Mumbai, 400076, India

  3. Soumyadeep Sur

    Present address: Department of Materials Science, Sardar Patel University, Anand, 388120, India

Authors and Affiliations

  1. Department of Industrial & Applied Chemistry, Swami Vivekananda Research Centre, Ramakrishna Mission Vidyamandira, Belur Math, Howrah, 711202, India

    Arnab De, Arnab Kumar Dey, Bibek Samanta, Soumyadeep Sur, Sourav Paul, Ashadul Adalder & Uttam Kumar Ghorai

  2. School of Physical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India

    Uttam Kumar Ghorai

  3. Department of Physics, Ananda Mohan College, Kolkata, 700009, India

    Sourav Paul, Ashadul Adalder & Swati Das

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  1. Arnab De
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Contributions

AD, AKD, BS, and SS synthesized the phosphors and performed the XRD and FTIR characterization. AD, AKD, SP, and AA performed the photoluminescence study. SP and AA analyzed the XPS and HRTEM results. All authors contributed to write the manuscript. SD and UKG supervised the project.

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Correspondence to Swati Das or Uttam Kumar Ghorai.

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De, A., Dey, A.K., Samanta, B. et al. Upconversion luminescence and time decay study of Yb–Er-doped BaWO4 nanophosphor. J Mater Sci: Mater Electron 33, 9641–9649 (2022). https://doi.org/10.1007/s10854-021-07607-6

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