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Upconversion Luminescence Properties of PSZT under Different Temprature and Polarizition

Author: LiuZhiZuo
Tutor: ChenXiangQun
School: Harbin Institute of Technology
Course: Materials Physics and Chemistry
Keywords: Upconversion luminescence Zirconate titanate (Sr, Pb) Ceramics Temperature Polarization
CLC: O482.31
Type: Master's thesis
Year: 2011
Downloads: 30
Quote: 0
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Abstract


Upconversion luminescence materials in the three-dimensional display , a broad application prospects in the field of infrared detectors, temperature sensors , and fluorescently labeled . Upconversion luminescence properties of the light-emitting materials by doping the type of rare earth ion concentration and matrix crystal field change , on the temperature and polarization make conversion matrix of light-emitting materials crystal field changes , therefore study the temperature and polarization on the conversion luminescence Properties of upconversion luminescence materials is of great significance . In this paper, the solid-phase method and the polymer network prepared rare earth ion doped lead zirconate titanate (PZT) and lead zirconate titanate, strontium (PSZT) to study the impact of different kinds of rare earth ions and concentration on conversion Luminescence Properties , and on conversion luminescence Properties under different temperature and polarization conditions change . By XRD and SEM characterization of the structure and morphology of the doped rare earth ion PZT and PSZT research found the PZT and PSZT powder and ceramic perovskite structure . 980nm diode laser excitation on rare earth doped PZT powders and ceramics into spectra findings of Er -doped PZT emitted the 525,550 nm green light , corresponding to the Er 3 2H11 / 2 , 4S3 / 2 level to the ground state 4I15 / 2 electronic transition . Er 3 -Yb 3 co-doped PZT is mainly emitted the 650nm red corresponds to of Er 3 in the 4F9 / 2 level to the ground state 4I15 / 2 level electronic transitions . In PSZT doping of rare earth elements , rare-earth - doped PZT samples , the incorporation of Er 3 of PSZT green , the incorporation of Er 3 -Yb the 3 of PSZT hair red , try in PSZT the Tm 3 -Yb 3 doped found Tm 3 -Yb 3 the doped PSZT powders and ceramics mainly emit blue light , corresponding to the Tm 3 in 1G4 3H6 level transition to the ground state . PSZT ceramic upconversion luminescence under conditions of variable temperature test , and found that as the temperature rises , the upconversion luminescence waning light intensity . Evaluated through the establishment of the relationship of light intensity and temperature of the sensitive nature of the rare earth doped PSZT ceramic temperature . The test conducted under the polarization conditions PSZT ceramic upconversion luminescence display, when the electric field less than the coercive field of luminous intensity no effect when the electric field exceeds the coercive field , the applied electric field causes the upconversion emission intensity decreases .

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CLC: > Mathematical sciences and chemical > Physics > Solid State Physics > Solid nature of the > Optical Properties > Luminescence
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