1 Hz, were applied. The temperature was ramped from 0 C to 120 C, at a rate of 2 C min ±1 . Films were dried in a vacuum dessicator for at least a week before use, and dry nitrogen flowed through the DMTA oven to prevent water uptake.
Uniform orange‐to‐red spherical phosphors of Sr2P2O7:Ce3+, Mn2+ have been synthesized by the co‐precipitation method and characterized by X‐ray powder diffraction, scanning electron microscopy, and photoluminescence spectroscopy. The results indicate that the morphology, size, and photoluminescence properties of Sr2P2O7:Ce3+, Mn2+ phosphors can be effectively controlled by the reaction and the sintering temperatures. Energy transfer from Ce3+ to Mn2+ in Sr2P2O7 phosphor was observed from photoluminescence spectra of Sr2P2O7:Ce3+, Sr2P2O7:Mn2+, and Sr2P2O7:Ce3+, Mn2+. Moreover, based on a self‐assembly process, a possible formation mechanism for the spherical phosphors is proposed. The uniform phosphor spheres obtained in this work exhibit great potential for high‐resolution display devices such as light emitting diodes.
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