Sol-gel technology was applied to fabricate Eu-doped BaTiO_(3)/SiO_(2)multilayer structures by spinning on silicon and fused silica substrates.Eu photoluminescence(PL)was investigated depending on the annealing temper...Sol-gel technology was applied to fabricate Eu-doped BaTiO_(3)/SiO_(2)multilayer structures by spinning on silicon and fused silica substrates.Eu photoluminescence(PL)was investigated depending on the annealing temperature of these structures.The samples demonstrate the room temperature luminescence corresponding to^(5)D^(0)→^(7)F_(J)(J=1,2,3,4)transitions of trivalent europium with the most intensive band at 615 nm.For the structure on fused silica with Eu in the BaTiO_(3)cavity,increase of the annealing temperature from 450℃to 700℃results in modification of the luminescence indicatrix and lowering of the luminescence intensity in the direction along the surface normal.For BaTiO_(3)/SiO_(2)multilayer structure generated on silicon,scanning electron microscopy(SEM)analyses reveal disordering after annealing at 1000℃.This heat treatment provides also an increase of the Eu luminescence intensity.展开更多
基金This work was partially supported by the State Committee on Science and Technology of the Republic of Belarus,Project No.T19MLDG-005.
文摘Sol-gel technology was applied to fabricate Eu-doped BaTiO_(3)/SiO_(2)multilayer structures by spinning on silicon and fused silica substrates.Eu photoluminescence(PL)was investigated depending on the annealing temperature of these structures.The samples demonstrate the room temperature luminescence corresponding to^(5)D^(0)→^(7)F_(J)(J=1,2,3,4)transitions of trivalent europium with the most intensive band at 615 nm.For the structure on fused silica with Eu in the BaTiO_(3)cavity,increase of the annealing temperature from 450℃to 700℃results in modification of the luminescence indicatrix and lowering of the luminescence intensity in the direction along the surface normal.For BaTiO_(3)/SiO_(2)multilayer structure generated on silicon,scanning electron microscopy(SEM)analyses reveal disordering after annealing at 1000℃.This heat treatment provides also an increase of the Eu luminescence intensity.
