Study of electron vibrational interaction parameters in chlorophosphate activated with Eu2+ ion

•The EVI parameters such as Huang–Rhys factor, effective phonon energy and zero phonon line position were estimated.•Eu2+ ion emission observed in chlorophosphate.•Material analyzed in this work have intermediate Huang–Rhys factor, high Stokes shift and low effective phonon energy.

We present the results of theoretical study of photoluminescence of Eu2+ ions activated chlorophosphate M5.17(PO4)3Cl5:Eu2+ with M = Ca, Sr and Ba estimating electron-vibrational interaction (EVI) parameters such as Huang–Rhys factor, effective phonon energy, Stokes shift and zero phonon line position. Validity of the calculated result was established by modeling the emission line which was found to be in good agreement with the measured photoluminescence spectrum of Eu2+ doped chorophosphates.