Efficient blue-LED was successfully manufactured by Nichia Company of Japan

in 1996

then it made that the solid-state lighting went into the field of white light illumination.Subsequently the white-LED came true

it was made from InGaN blue-LED and YAG:Ce

3+

phosphor

hereafter the internationally scientific research institute paid great attention to it.And it was also arranged in the “863” Program in China.When the organic dyes were doped into silicon dioxide(SiO

2

)

it can be synthesized organic-inorganic composite luminescence material

which had both the excellent luminous property of the organic luminescent molecule and the stability of the inorganic material for the heat

chemistry and mechanism.So this kind of composite phosphor was considered as the ideal fluorescence transforming material.Composite phosphor is easy to product and the production cost is very low

and there is not any pollution in the fabrication procession.Because of all the advantages

the people were further to be favor of this method.Because the Sol-gel Gateway has many advantages compare to the traditional method of solid phase reaction.It can provide a simple

economic and effective method to produce high quality material.Many chemical reactions can be finished in a low temperature and the reaction procession is easy to be controlled.The doping distribution is even in the composite material.The organic-inorganic composite phosphor was synthesized with the Sol-gel Gateway in this paper

which based on the raw material of TEOS and organic fluorescent dye.The procession of fabrication was discussed and some of the properties were researched

including the influence of the doping concentration of the organic fluorescent dyes

the ratio of H

2

O to TEOS and the pH value on the reaction time and the material performance.Using the testing method of PL spectra

XRD and TEM

the properties of composite phosphor were identified

including spectrum

structure

granularity and appea-rance.It can be seen from the TEM image of the phosphor that the powder is transparent in nanometer size.The spectra of the phosphor at the different doping concentration indicates that the excitation wavelength is 450 nm and the emission wavelength is 520 nm

the excitation spectra peak is not changed with the doping concentration but the intensity of fluorescence is inflected by it

and the best doping concentration is 5×10

-4

mol/L.The excitation band is wide so that it satisfies the requirement of the white-LED.