首页|Synthesis,structure,and luminescence properties of melilite Dy3+∶LuxCaLa0.98-xGa3O7 phosphors for use in yellow light-emitting devices

Synthesis,structure,and luminescence properties of melilite Dy3+∶LuxCaLa0.98-xGa3O7 phosphors for use in yellow light-emitting devices

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Dy3+and Lu3+co-doped CaLaGa3O7 phosphors were prepared via high-temperature solid-phase reaction.The electronic structures of LuxCaLa0.98-xGa3O7 were investigated by the first-principles calculations.The influence of Lu3+on yellow light emission was studied using X-ray diffraction(XRD)and photoluminescence(PL)measurements.The XRD results indicate that compared to Dy3+∶CaLaGa3O7,the cell parameters of Dy3+∶LuCaLaGa3O7 tend to decrease,which is due to the smaller radius of Lu3+.When pumped by blue GaN laser diode(LD),the emission peaks of phosphors with different Lu3+doping concentrations in the visible region are similar,with the strongest peak at 574 nm in the yellow light region,which is sensitive to human eyes.The optimal doping concentration of Lu3+is confirmed to be 1 at％,when all emission spectra and measured fluorescence lifetimes are taken into account.Moreover,the optimal phosphor composition Dy3+∶LuxCaLa0.98-xGa3O7(x=0.01)has an internal quantum effi-ciency(IQE)of 46.94％and an external quantum efficiency(EQE)of 15.19％.Most notably,the prepared phosphor demonstrates excellent thermal stability and a high activation energy(0.203 eV).In addition,the International Illumination Commission color coordinates of the Dy3+∶LuxCaLa0.98-xGa3O7 phosphors are in the yellow light area.The above analysis indicates that the Dy3+∶LuxCaLa0.98-xGa3O7(x=0.01)phosphor has promising application prospects in yellow light-emitting devices.

Dy3+∶LuxCaLa0.98-xGa3O7 phosphorsYellow emissionStructure characteristicsLuminescent propertiesRare earths

Yunyun Liu、Chuanxin Huang、Meng Wang、Xihu Wang、Yan Wang、Ju Gao

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School of Opto-Electronic Engineering,Zaozhuang University,Zaozhuang,277160,China

Key Laboratory of Functional Materials and Devices for Informatics of Anhui Educational Institutions,Department of Physics,Fuyang Normal University,Fuyang,236037,China

Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou,350002,China

Shandong Provincial Natural science FoundationShandong Provincial Natural science FoundationNational Natural Science Foundation of ChinaAnhui Provincial Natural Science FoundationAnhui Provincial Natural Science Foundation

ZR2020QE034ZR2021QF081119743042008085QA452008085QA49

2024

10.1016/j.jre.2023.09.008

稀土学报(英文版)
中国稀土学会

稀土学报(英文版)

CSTPCDEI
影响因子：1.3
ISSN：1002-0721
年,卷(期)：2024.42(8)
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