Zhao, Ming Xia, Zhiguo Molokeev, Maxim S. Ning, Lixin Liu, Quanlin Temperature and Eu<sup>2+</sup>-Doping Induced Phase Selection in NaAlSiO<sub>4</sub> Polymorphs and the Controlled Yellow/Blue Emission The union of temperature-dependent phase transition and relating structural transformation via modification of chemical compositions is of fundamental importance for the discovery of new materials or their functional properties optimization. Herein, the synthesis temperature and Eu<sup>2+</sup>-doping content induced phase selection and variations of the local structures in nepheline, low-carnegieite and high-carnegieite types of NaAlSiO<sub>4</sub> polymorphs were studied in detail. The luminescence of Eu<sup>2+</sup> in low-carnegieite and nepheline phases shows blue (460 nm) and yellow (540 nm) broad-band emissions, respectively, under near-ultraviolet excitation. The photoluminescence evolution can be triggered by the different synthesis temperatures in relation to the Eu<sup>2+</sup>-doping concentration, as corroborated by density functional theory calculations on the local coordination structures and corresponding mechanical stabilities in terms of the Debye temperature. The fabricated white light-emitting diode device with high color rendering index demonstrates that the multicolor phosphors from one system provides a new gateway for the photoluminescence tuning. high-carnegieite types;doping concentration;NaAlSiO 4 polymorphs;phase selection;broad-band emissions;low-carnegieite;theory calculations;doping content;NaAlSiO 4 Polymorphs;synthesis temperatures;near-ultraviolet excitation;Eu;light-emitting diode device;temperature-dependent phase transition;properties optimization;coordination structures;Doping Induced Phase Selection;nm;Debye temperature;photoluminescence evolution;chemical compositions;nepheline phases;synthesis temperature 2017-07-07
    https://acs.figshare.com/articles/dataset/Temperature_and_Eu_sup_2_sup_-Doping_Induced_Phase_Selection_in_NaAlSiO_sub_4_sub_Polymorphs_and_the_Controlled_Yellow_Blue_Emission/5231677
10.1021/acs.chemmater.7b02548.s003