Hydrothermal-assisted ion exchange synthesis and photoluminescence of Li+ and Eu3+ co-doped NaLa(WO4)2 as near-UV type red phosphors

► A simple hydrothermal-assisted ion exchange method to synthesize Li+ and Eu3+ co-doped NaLa(WO4)2. ► Considerable photoluminescence enhancement due to the Li+ doping. ► Potential application as red nanophosphors in near-UV type LEDs