Journal of Inorganic Materials, Volume. 35, Issue 2, 236(2020)

Preparation and Tunable Luminescence of Eu Doped KNN Ceramics

Meng-Hui WANG1... Hui SHEN1,2,*, Tian TIAN1, Qin XIAN1, Jia-Yue XU1,*, Min JIN3 and Run-Ping JIA1 |Show fewer author(s)
Author Affiliations
  • 1School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, China
  • 2State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
  • 3School of Materials Science and Engineering, Shanghai Dianji University, Shanghai 201306, China
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    Figures & Tables(6)
    XRD patterns of the precursor powders synthesized at 200 ℃ for 12 h (K+/Na+=3:1) with different [OH-] concentrations (a), XRD patterns of KNN:xEu (x=0.02, 0.04, 0.06, 0.08, 0.10) powders synthesized at 200 ℃ for 12 h (K+/Na+=3:1, [OH-]=11 mol/L) (b) and zoomed XRD patterns from (b) within 30°-33° (c)
    SEM image of KNN:0.06Eu ceramics synthesized at 1140 ℃ for 4 h
    Excitaion (λem=618 nm) spectra of the KNN:0.06Eu ceramics and emission (λex=465 nm) spectra of KNN:xEu ceramics at room temperature (a) and the dynamic decay curves on Eu3+ concentrations for KNN:Eu samples under 465 excitation (b)
    Reflectance spectra for the KNN:0.06Eu by UV light irradiation (0 s, 30 s, 60 s, 2 and 3 min) (a), difference absorption (Δabs) spectra for the KNN:0.06Eu by UV irradiation 3 min with inset showing photographs of color changes of ceramic before and after UV irradiation (b), the Δabs vs Eu concentration (c) and reflectance intensity changes (d) of KNN:0.06Eu by alternating UV irradiation and heat treatment
    Changes of emission spectra (λex=465 nm) of KNN:0.06 Eu ceramics before and after UV irradiation for 3 min (a), luminescence switching ratio (ΔRt) at 615 nm as a function of Eu concentration (b) and ΔRt of KNN:0.06Eu ceramics by alternating UV light irradiation and thermal stimulus for 7 cycles (c)
    Luminescence modulation ratio (ΔRt) as a function of irradiation time under different irradiation wavelengths (a) and schematic diagram of luminescence modulation upon photochromic reactions for KNN:xEu ceramics (VO is oxygen vacancy, and VA is K and Na vacancy) (b)
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    Meng-Hui WANG, Hui SHEN, Tian TIAN, Qin XIAN, Jia-Yue XU, Min JIN, Run-Ping JIA. Preparation and Tunable Luminescence of Eu Doped KNN Ceramics[J]. Journal of Inorganic Materials, 2020, 35(2): 236

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    Paper Information

    Category: RESEARCH LETTERS

    Received: Mar. 12, 2019

    Accepted: --

    Published Online: Jan. 27, 2021

    The Author Email: SHEN Hui (hshen@sit.edu.cn), XU Jia-Yue (xujiayue@sit.edu.cn)

    DOI:10.15541/jim20190106

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