Influence of boric acid on properties of Sr₂MgSi₂O₇:Eu²⁺,Dy³⁺ phosphors

Abstract

Purpose

The purpose of this paper is to investigate the effect of boric acid as a flux on the formation of the akermanite phase and optical properties of SrMgSi₂O₇:Eu,Dy phosphors.

Design/methodology/approach

The silicate‐based phosphor is prepared by sol‐gel method. Sr(NO₃)₂, Mg(NO₃)₂ · 6H₂O, Dy₂O₃, Eu₂O₃, are added to distilled water in their stoichiometric ratio, the obtained solution are mixed with H₃BO₃ (in the range of 0.01‐0.5 mol%) and a polymeric compound TESO (C₈H₂O₄Si). At the end, the phase composition and optical properties are investigated using X‐ray diffraction (XRD) and spectrophotometer analysis, respectively.

Findings

The XRD results showed that the akermanite (Sr₂MgSi₂O₇) is the only crystalline phase which is detected in the sample containing 0.05 mol% boric acid. Increasing of boric acid does not have a great effect on the XRD patterns intensity. Spectrophotometer analysis results show three maximum at 365, 395 and 430 nm on the excitation spectra. It also shows intensity of the excitation and emission spectra increased by adding boric acid up to 0.25 mol% and a sudden drop at 0.5 mol% boric acid.

Originality/value

Using boric acid as a flux, enhances formation of akermanite phase at lower temperature with desirable optical properties and a cost‐benefit way for industrial production. In this research, optimum value of boric acid was determined using XRD data, emission and excitation spectra.

Citation

Maghsoudipour, A., Hassan Sarrafi, M., Moztarzadeh, F. and Aghajani Bazazi, A. (2010), "Influence of boric acid on properties of Sr₂MgSi₂O₇:Eu²⁺,Dy³⁺ phosphors", Pigment & Resin Technology, Vol. 39 No. 1, pp. 32-35. https://doi.org/10.1108/03699421011009573