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- W2392937072 abstract "Phosphor Sr5Si2O7Cl4:Eu2+was synthesized using the high temperature solid state method.Under the 370 nm excitation,phosphor Sr5Si2O7Cl4:Eu2+shows one unsymmetrical emission at 490 nm.Two obvious emission peaks at 485 nm and 520 nm can be obtained through the Gaussian curve simulation.According to the van Uitert experimental formula,luminescent characteristics and crystal-lattice environment of Eu2 + in Sr5Si2O7Cl4 are discussed.The two emission centers exist in the crystal,viz,blue and greenishyellow centers are verified.The 485 nm emission band originates from the Eu2 +center which inhabits the seven compounds,and the 520 nm emission band depends on the impurity-trapped exciton.Under the condition of doping Ca2 +,the luminescent characteristics of the phosphor are investigated.When the doping amount of calcium(x) varies between 0 and 0.5,Ca2 +are embedded in the host lattice of Sr5Si2O7Cl4,and the blue emission originates from Eu 2+which substitutes seven compounds Sr 2+sites,and the phosphor emits a blue-green light.Under the condition of 0.5x2,the parameters of the crystal system decreases with Ca2 +content is increased,the impurity-trapped exciton is also strengthened,and the excitation state energy of Eu2 +which exists in the center of impurity-trapped exciton will decrease.Hence,a long wavelength emission appears,and emits a greenish-yellow luminescence." @default.
- W2392937072 created "2016-06-24" @default.
- W2392937072 creator A5073706747 @default.
- W2392937072 date "2010-01-01" @default.
- W2392937072 modified "2023-09-24" @default.
- W2392937072 title "LUMINESCENT CHARACTERISTICS OF Sr_5Si_2O_7Cl_4:Eu~(2+) PHOSPHOR" @default.
- W2392937072 hasPublicationYear "2010" @default.
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