首页|Exploring one material for dual applications:A red-emitting Mg2GeO4:Eu3+nanophosphor for future generation energy efficient WLEDs and dosimetric applications

Exploring one material for dual applications:A red-emitting Mg2GeO4:Eu3+nanophosphor for future generation energy efficient WLEDs and dosimetric applications

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The envisaged design and development of individual materials to excavate a broader spectrum of desired properties and offer multiple applications are highly necessitating.Keeping this in mind,a series of forsterite-structured Mg2GeO4:Eu3+(1 mol％-9 mol％)nanophosphors was synthesized via a solution combustion method using oxalyl dihydrazide as a fuel.The X-ray diffraction patterns confirm the orthorhombic crystal system with a Pnma space group.Morphological results clearly show irregularly shaped cluster-like structures with aggregation of the particles.Employing diffuse reflectance spectra,the optical energy band gap of the Mg2GeO4:Eu3+(1 mol％-9 mol％)nanophosphors was estimated and obtained to be～4.12-4.32 eV.The photoluminescence emission spectra exhibit intense peaks at～579,589,610,661,and 707 nm,which are due to characteristic 5D0 → 7F0,5D0 → 7F1,5D0 → 7F2,5D0 → 7F3 and 5D0 → 7F4 transitions of Eu3+ions,respectively.The Commission International de L'Eclairage color coordinates are gradually tuned from pale red(0.5980,0.4012)to a pure red(0.6385,0.3611)region.Thermoluminescence glow peaks showcase excellent super-linear response at low doses of γ-irradia-tions,indicating that the prepared phosphor can be used in thermoluminescent personal dosimetry which is a biological tissue equivalent.The aforementioned results demonstrate that the prepared Mg2GeO4:Eu3+(1 mol％-9 mol％)nanophosphors are considered an excellent candidate for dual appli-cations,i.e.,red component in future generation white-light-emitting diodes(WLEDs)and personal dosimetric applications.

NanophosphorsPhotoluminescenceThermoluminescenceDosimetryPhotometric properties Rare earths

Akshay Arjun、G.P.Darshan、S.C.Sharma、H.Nagabhushana、D.V.Sunitha、H.B.Premkumar

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Department of Physics,Faculty of Mathematical and Physical Sciences,M.S.Ramaiah University of Applied Sciences,Bengaluru,560054,India

Jain University,Bengaluru,560 069,India

Centre for Advanced Materials,Tumkur University,Tumkur,572103,India

School of Applied Sciences(Physics),REVA University,Bengaluru,560064,India

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2024

10.1016/j.jre.2023.10.011

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(10)