Tunable light emission of amorphous Eu3Â +/Tb3Â + co-doped MgAl-hydroxide salts depending on phase transition

Two of Eu3 +/Tb3 + co-doped amorphous Mg-Al double hydroxide salts, with Eu3 +/Tb3 + molar ratio of 1/4 (I) and 4/1(II), were prepared and their photoluminescence depending on phase transition has been investigated. Results revealed that the Eu3 +/Tb3 + co-doped amorphous samples exhibited excellent tunable emissions under different excitation wavelengths. Moreover, the emission intensity of Eu3 + and Tb3 + present in the amorphous host is greatly stronger than that of the multi-crystalline host, indicating the amorphous Mg-Al double hydroxide salts would be potential application in white-light LED.183