Room temperature red emitting carbodiimide compound Ca(CN2):Mn2+

Carbodiimides are a growing group of compounds, which raised interest as hosts for luminescent materials. Ca(CN2) doped with 5, 10 and 50 mol% Mn2+ was synthesized by a solid-state metathesis reaction at rather low temperature. The unit cell volume of Ca(CN2) decreases with increasing the Mn2+ concentration. The emission spectra of the doped material show an emission band in the red spectral range originating from the 4T1g(4G)-6A1g(6S) transition.