本研究以矽酸鹽類Na3YSi2O7為主體晶格材料，分別摻雜活化中心如：Eu3+、Tm3+、Dy3+、Sm3+、Tb3+、Bi3+等離子，期望得到不同放光波段之螢光粉體。製程方面乃是利用高能震動球磨來混合起始物原料，並使用固相反應法在1200℃中持溫6小時完成螢光粉體的製備。分析方面則以熱重熱差分析儀來分析起始混合物之成相溫度，再使用X光粉末繞射、掃描式電子顯微鏡、紫外光-可見光全反射光譜分析儀及光激發光光譜分析儀來分析粉體結構、表面形貌及光譜分析。
發射紅光之螢光體中，Na3YSi2O7:Eu3+螢光粉以393 nm (7F05L6躍遷)為光源激發所得之發射光譜包含595 nm之5D07F1 及615 nm之5D07F2躍遷放光。其發射光譜換算得到的CIE色度座標為(0.64 , 0.36)，相當接近國際色度之座標準紅光範圍，且其紅光發光強度為商業螢光粉ZnS:Mn2+,Te2+強度的2.5倍。
發射藍光之螢光體中，Na3YSi2O7:Tm3+螢光粉以354 nm為光源激發所得之放射光譜，除主波峰外其他範圍放光相當少。主波峰波長為455 nm且其半高寬相當狹窄，CIE國際色度座標為(0.16 , 0.04)，色純度為92％；另一系列之Na3YSi2O7:Bi3+螢光粉體以308 nm(1S03P1躍遷)為光源激發，可得發射光譜中波長為386 nm(3P11S0躍遷)的寬廣放射峰，其CIE色度座標為(0.16 ,0.04)， 亦接近CIE色度座標中之藍光範圍。
發射綠光之螢光體中，Na3YSi2O7:Tb3+螢光粉體於261 nm有一寬廣的4f-5d吸收峰，以及於300~500 nm間一系列的4f軌域特性吸收峰。Na3YSi2O7:Tb3+使用波長261 nm為光源激發所得的發射光譜以540 nm(5D47F5躍遷)最強，其放射光之CIE色度座標位於(0.22 , 0.73)，接近綠光範圍。
Na3YSi2O7: Sm3+及Na3YSi2O7: Dy3+螢光粉則由於稀土離子5s5p 外層電子的屏蔽作用，使得4f 電子的躍遷受結晶場的影響相當有限，其光譜性質基本上與自由態的稀土離子相同，亦即摻雜Sm3+及Dy3+離子分別屬於橘黃色與近白光放射，並沒有太大的變化。

The object of this research was to use silicate oxide Na3YSi2O7 as the host material, doped with Eu3+, Tm3+, Dy3+, Sm3+, Tb3+, Bi3+ ions as the activator in order to get the phosphors with different emission light. The raw materials were mechanically activated by grinding in high energy vibromill followed by calcining at 1200 ℃ for 6 h. By using DTA-TGA, XRD, SEM, UV-visable spectra and PL spectra, the characterization of structure, morphology of powders and photo-luminescent properties of phosphors were analyzed.
In Na3YSi2O7:Eu3+ phosphors with red light emission, by using the light source at 393 nm (7F05L6 transition), the emission spectra of the phosphors had narrow peaks at 595 nm (5D07F1 transition) and 615 nm (5D07F2 transition) originated from intra-4f transitions. The 5D07F2 emission intensity was stronger than 5D07F1. The emission intensity of red light was two times higher than commercial phosphors ZnS:Mn2+,Te2+. The CIE chromaticity coordinates of the Na3YSi2O7:Eu3+ phosphors were (0.64 , 0.36) which was close to NTSC system standard red chromaticity.
In Na3YSi2O7:Tm3+ phosphors with blue light emission, by using the light source at 354 nm, the emission spectra had major narrow peak at 455 nm with a sharp FWHM. The CIE chromaticity coordinates of the Na3YSi2O7:Tm3+ phosphors were (0.16 , 0.04) which was close to NTSC system standard blue chromaticity with great color purity about 92.5％. In Na3YSi2O7:Bi3+ phosphors with blue light emission, by using the light source at 308 nm(1S03P1 transition), the emission spectra had a board band at 386 nm. The CIE chromaticity coordinates of the Na3YSi2O7:Bi3+ phosphors were (0.16 , 0.04) which was close to NTSC system standard blue chromaticity.
In Na3YSi2O7:Tb3+ phosphors with green light emission, the excitation spectra had a board band at 261 nm which could be ascribed to 4f-5d transition and the sharp peaks in the range from 300 to 500 nm were associated with typical intra-4f transitions. The dominant emission peak was at 540 nm(5D47F5 transition). The CIE chromaticity coordinates of the Na3YSi2O7:Tb3+ phosphors were (0.22 , 0.73) which was close to NTSC system standard green chromaticity.
However, the valence electrons of trivalent rare earth ions were shielded by the 5s and 5p outer electrons, they were weakly affected by ligand ions in crystals, so the features of optical spectra of the most phosphors doped with trivalent rare earth ions, such as Na3YSi2O7: Sm3+ and Na3YSi2O7: Dy3+ were similar to those expected for free ions.

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