Optical Properties And Applications Of Transition Metal Ions Doped Luminescence Glasses

In this paper, Al₂O₃ and Y₃Al₅O₁2 host luminescence materials were prepared by using hydrothermal method and high temperature solid state method respectively, and by doping the phosphor into the tellurate glasses and organic glasses, the luminescence glasses have been prepared. The crystal structure and the optical properties of the samples with different doping concentrations have been studied in detail. The main contents are summarized as follows:（1） The Al₂O₃:Cr³⁺ nano phosphor has been prepared by hydrothermal method. The crystal structure and the optical properties have been studied. The excitation spectra show two broad excitation bands, the peaks are around 405 nm and 557 nm. By exciting the sample at 405 and 557 nm respectively, it produced a narrow emission band centered at 698 nm. On consideration of the broad absorption bands and narrow emission band, the Al₂O₃:Cr³⁺ nano phosphor can be used to rising the efficiency of the solar cells and the crops.The feasibility of using Al₂O₃:Cr³⁺ nano phosphor to improve the efficiency of the solar cells and to the agricultural film has been studied further. The tellurate inorganic glasses, organic glasses and polyethylene film with Al₂O₃:Cr³⁺ phosphor doping have been prepared. The XRD, excitation spectra and emission spectra show this preparation method will not change the crystal structure and the optical properties of Al₂O₃ phosphor. By using the as-prepared luminescence glasses with different doping concentration to modify the solar cells, the external quantum efficiency and photovoltaic parameters of multicrystalline silicon solar cells have been studied. The results indicate when the Al₂O₃:Cr³⁺ doping concentration is 0.5%, the luminescence glasses can improve the efficiency of the solar cells efficiently.（2） The Y₃Al₅O₁2:Mn⁴⁺ phosphor has been systhesised by solid state method. The excitation spectra and emission produced two broad excitation bands and two narrow emission bands. On consideration of the broad absorption bands and narrow emission band, the Y₃Al₅O₁2:Mn⁴⁺ phosphor can be used to rising the efficiency of the solar cells and the crops.The feasibility of using Y₃Al₅O₁2:Mn⁴⁺ phosphor to improve the efficiency of the solar cells and the agricultural film has been studied further. The tellurate inorganic glasses and the organic glasses with with Y₃Al₅O₁2:Mn⁴⁺ phosphor doping have been prepared. The XRD, excitation spectra and emission spectra show this preparation method will not change the crystal structure and the optical properties of Y₃Al₅O₁2 phosphor. Further illustrate the tellurate inorganic glasses and the organic glasses with Y₃Al₅O₁2:Mn⁴⁺ phosphor doping to improve the efficiency of solar cells and promote the growth of crops have potential application.