首页|Crystal structure and luminescence dynamics of highly pure LiM(PO3)3∶Eu3+(M=Sr,Ca)red phosphors for white light emitting diodes

Crystal structure and luminescence dynamics of highly pure LiM(PO3)3∶Eu3+(M=Sr,Ca)red phosphors for white light emitting diodes

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Highly pure red phosphors LiM(PO3)3∶Eu3+(M=Sr,Ca)doped with Eu3+(1 mol％)were synthesized via solution combustion method and their crystal structure and luminescence dynamics were studied to explore its suitability in white light emitting diodes.The Rietveld refinement analysis of the powder X-ray diffraction patterns reveals that the phosphors belong to the pure triclinic phase of LiSr(PO3)3 and LiCa(PO3)with space group P-1(2).The scanning electron microscopy images showed the agglomerated morphology.The photoluminescence emission spectra under 393 nm show an orange band at 594 nm and a red band at 613 nm ascribed to 5D0 → 7F1,5D0 → 7F2 transitions of Eu3+ion in both the phosphors.Moreover,the spectroscopic properties such as luminescence behaviour,and Stark splitting were used to examine the symmetry of Eu3+ions in LiM(PO3)3∶Eu3+(M=Sr,Ca)phosphors in terms of distortion induced upon doping.The Stark splitting shows that the actual site symmetry for Eu3+ion was estimated to be D2 type for both phosphors.The photometric properties of LiCa(PO3)3∶Eu3+such as Commission International de l'Eclairage coordinates(x=0.64,y=0.36)near to the standard one(red),high color purity(95％)and higher brightness reveal that the phosphor has the capability of acting as a red component in n-UV white light emitting diodes.

PhotoluminescencePhosphateWLEDsStark splittingRare earths

Payal Khajuria、M.Manhas、A.K.Bedyal、Ankush Vij、H.C.Swart、Vinay Kumar

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Department of Physics and Astronomical Sciences,Central University of Jammu,Rahya-Suchani,Samba,181143,J&K,India

Department of Physics,School of Sciences,Cluster University of Jammu,Canal Road,Jammu,180001,India

Department of Physics,University of Petroleum and Energy Studies,Dehradun,Uttarakhand,248007,India

Department of Physics,University of the Free State,P.O.Box 339,Bloemfontein,ZA 9300,South Africa

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Defence Research and Development Organization(DRDO),Govt.of India under DIA-KCOE(Kalam Centre of Excellence)

KCST-SS02/2020

2024

10.1016/j.jre.2023.08.016

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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