%0 Generic
%A Zhao, Ming
%A Xia, Zhiguo
%A Molokeev, Maxim S.
%A Ning, Lixin
%A Liu, Quanlin
%D 2017
%T Temperature and Eu2+-Doping Induced Phase
Selection in NaAlSiO4 Polymorphs and the Controlled Yellow/Blue
Emission
%U 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
%R 10.1021/acs.chemmater.7b02548.s003
%2 https://acs.figshare.com/ndownloader/files/8935714
%K high-carnegieite types
%K doping concentration
%K NaAlSiO 4 polymorphs
%K phase selection
%K broad-band emissions
%K low-carnegieite
%K theory calculations
%K doping content
%K NaAlSiO 4 Polymorphs
%K synthesis temperatures
%K near-ultraviolet excitation
%K Eu
%K light-emitting diode device
%K temperature-dependent phase transition
%K properties optimization
%K coordination structures
%K Doping Induced Phase Selection
%K nm
%K Debye temperature
%K photoluminescence evolution
%K chemical compositions
%K nepheline phases
%K synthesis temperature
%X 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 Eu2+-doping content induced phase selection and variations
of the local structures in nepheline, low-carnegieite and high-carnegieite
types of NaAlSiO4 polymorphs were studied in detail. The
luminescence of Eu2+ 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 Eu2+-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.
%I ACS Publications