Concentration dependent luminescence, energy transfer and Judd- Ofelt analysis of single composition white light emitting NaCa2Mg2V3O12: XEu3+ phosphor. (1st June 2022)

• Record Type: Journal Article
• Authors: Krishnapriya, T.; Jose, Adon; Jose, Jeena Rose; P S, Vijoy; Joseph, Cyriac; Biju, P.R.
• Is Part Of: Materials science in semiconductor processing. Volume 143(2022)
• Publication Date: 2022-06-01
• Subjects: Phosphor -- Luminescence -- Solid state reaction method -- LEDs -- White light emission; Semiconductors -- Periodicals; Integrated circuits -- Materials -- Periodicals; Semiconducteurs -- Périodiques; Circuits intégrés -- Matériaux -- Périodiques; Electronic journals; 621.38152
• DOI: 10.1016/j.mssp.2022.106498
• Languages: English
• ISSNs: 1369-8001

Abstract

Abstract: Near- UV-activated NaCa2 Mg2 V3 O12 : X Eu 3+ phosphors were synthesized by conventional solid state reaction method and the structural and luminescent properties were studied in detail. The XRD patterns reveal their cubic structure with Ia 3 ‾ d (230) space group and the excitation spectra exhibited the broad and intense absorption in the near UV region. The undoped host was effectively excited under 342 nm to get a blue-green emission whereas characteristic Eu 3+ emission along with host emission was observed in the Eu 3+ doped NaCa2 Mg2 V3 O12 phosphors. Here VO4 3− group absorbs and transfers energy to the Eu 3+ ions there by acting as sensitizers. The quadrupole-quadrupole interactions responsible for multipolar interactions along with decay curves were used to confirm the energy transfer process. The Judd- Ofelt analysis was performed to evaluate the various radiative properties of the synthesized phosphors. The thermal stability of the sample was evaluated and found to be very promising. Quantum yield of the white light emitting NaCa2 Mg2 V3 O12 : 0.08Eu 3+ phosphor was measured and the value is found to be 46.11% and the life time of the 5 D0 excited state was 0.4358 ms. The CIE coordinate (0.3086, 0.3517) and CRI (82) values corresponding to the optimum concentration sample proves the prepared phosphor to be promising for various optoelectronic applications.