| The rare earth elements that has unique 4f energy structure can be used as an efficient luminescence centerhas in the layered perovskite materials. Perovskite composite oxides were widely studied because of their layered stable structure, excellent performance.Layered perovskite nano fluorescent material that was intercalated and stripped has been becomed a research hotspot due to its unique two-dimensionalsheet structure and excellent luminescent properties.The main content was as follows:Firstly, Bi2Sr1-xM2O9:xEu3+(M=Ta, Nb; BSM) has a good crystalline phase. BST:0.12Eu3+ nanosheets appeared stronger red emission peak than BSN:0.10Eu3+. Nanometer thin membrane is layered and continuity via the method of LBL.Secondly, LaBrO:Re3+(xEu3+, yCe3+, zTb3+) has a good crystalline phase and emission spectrum close to white light at 326nm (x=5%, y=5%, z=0.5%). LaBrO:Re3+has obviouslyTyndall effect and good stability. Nanostructure slice layer size is about 550 nm. Nanometer thin membrane appeared stronger white emission peak under UV excitation.Thirdly, Sr2+, Eu2+ and Mn2+tri-doped BaMgAl10O17 (BAM) phosphors that emitting the blue-gree light were prepared by solution combustion synthesis at 600? For the first time.. The results show that the formation temperature of the BAM phase by the solution combustion synthesis method was significantly lower than that of a high temperature solid state reaction method. The nanorods of SBAM:Eu2+, Mn2+with non-aggregation and well distribution were synthesized. The energy transfer from Eu2+to Mn2+was very efficient. The inserted Sr2+ have further enhanced the luminescent intensity to 2 times of the BAM hosts due to a distorted co-ordination field and made the emission spectra to green-shift and the CIE y value to increase. The BAM:0.1Eu2+,0.04Mn2+,0.05Sr2+phosphor presented xy CIE chromaticity coordinated were related to the blue-green reign at (0.1457,0.2497). Nanometer thin membrane appeared blue-green emission peak under UV excitation. |
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