Absorption, excitation and emission spectra of SrCl2:Eu2+

The 10 K ultraviolet emission spectrum and low-energy ultraviolet absorption spectra are reported for dilute SrCl2:Eu2+. Only one luminescent state is observed under various synchrotron radiation excitation wavelengths. The broad room temperature 4f65d → 4f7 emission spectrum, peaking at 410 nm, sharpens considerably at 10 K and vibrational progressions in the totally symmetric Sr–Cl stretching mode of 210 cm−1 upon the zero phonon line and vibronic structure are predominant. The low-energy 4f7 → 4f65d absorption spectrum comprises similar vibronic structure but many transitions overlap. The emission, absorption and excitation spectra are well simulated by calculation.