Photoluminescence property of a novel inorganic-organic red emitting phosphor based on Mg/Al/Eu layered double hydroxide

A novel inorganic-organic red light emitting phosphor was synthesized by intercalating a sensitizer anion, terephthalate into Mg/Al/Eu layered double hydroxides through an ion exchange method. The basal spacing is 13.9 Å, indicating that a vertical arrangement of terephthalate anions within the gallery is adopted. This material displays much enhanced red luminescence from Eu 3+ ions, suggesting that there is an efficient energy transfer from the excited state of the intercalated terephthalate anions to Eu 3+ centres in the host layers. The optimal doping concentration of Eu 3+ is 10 mol %.