| Summary: | 博士 === 國立高雄應用科技大學 === 化學工程與材料工程系博碩士班 === 103 === This study employed a cellulose-citric acid sol-gel method to synthesize γ-LiAlO2：Mn2+ phosphor and CaZrO3：Mn2+ phosphor, respectively, to examine the material properties of phosphor, as well as the energy transfer properties between Mn2+ ions of phosphor.
For material properties of γ-LiAlO2：Mn2+ phosphor and CaZrO3：Mn2+ phosphor, the crystal structure of γ-LiAlO2：Mn2+ phosphor possesses a γ-phase structure of the tetragonal lattice system belonging to the P42I2{90} space group; the crystal structure of CaZrO3：Mn2+ phosphor possesses an orthorhombic structure belonging to the Pnma{62} space group; the particle distribution of the γ-LiAlO2：Mn2+ phosphor is composed of irregular spherical and rectangular particles in which the particles of the phosphor comprises Al atoms and O atoms and Mn atoms; the particle distribution of the CaZrO3：Mn2+ phosphor appear in the form of irregular spheres in which the particles of the phosphor comprises Ca atoms and Zr atoms and O atoms and Mn atoms; the excitation spectrum of γ-LiAlO2：Mn2+ phosphor shows an excitation peak at a wavelength of 440.6 nm, conforming to the 6A1(6S)→4T2(4G) energy level transition in Mn2+ ions; the emission spectrum of γ-LiAlO2：Mn2+ phosphor shows a peak in the emission at 556.6 nm, which conforms to the 4T1(4G)→6A1(6S) energy level transition in Mn2+ ions, radiating yellowish green light; the excitation spectrum of CaZrO3：Mn2+ phosphor presented an excitation peak at a wavelength of 457 nm, corresponding to the 6A1(6S)→4T2(4G) energy level transition in Mn2+ ions; the emission spectrum of CaZrO3：Mn2+ phosphor exhibits a peak emission at 541 nm, corresponding to the 4T1(4G)→6A1(6S) energy level transition in Mn2+ ions, radiating yellowish green light.
For energy transfer phenomenon of γ-LiAlO2：Mn2+ phosphor, the results are verified by Blasse’s equation that the maximum distance for energy transfer between Mn2+ ions in γ-LiAlO2：Mn2+ phosphor is 43.142 Å; the results are also examined by Dexter’s theory that the mechanism of energy transfer between Mn2+ ions in γ-LiAlO2：Mn2+ phosphor is an electric dipole and electric quadrupole interaction. For energy transfer phenomenon of CaZrO3：Mn2+ phosphor, the results are verified by Blasse’s equation that the maximum distance for energy transfer between Mn2+ ions in CaZrO3：Mn2+ phosphor is 62.72 Å; the results are also examined by Dexter’s theory that the mechanism of energy transfer between Mn2+ ions in CaZrO3：Mn2+ phosphor is an electric quadrupole interaction.
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