(1. 貴州師范大學(xué) 化學(xué)與材料科學(xué)學(xué)院，貴陽 550001；
2. 貴州省功能材料化學(xué)重點(diǎn)實(shí)驗(yàn)室，貴陽 550001；
3. 貴州師范大學(xué) 職業(yè)技術(shù)學(xué)院，貴陽 550001)
摘 要: 采用高分子網(wǎng)絡(luò)凝膠法合成Eu3+摻雜LaP3O9 發(fā)光材料，并通過X射線衍射(XRD)、 熒光光譜和傅里葉變換紅外光譜(FT-IR)等對合成產(chǎn)物的物相結(jié)構(gòu)和光學(xué)性能進(jìn)行研究，并對部分合成工藝條件、Eu3+離子摻雜量等對合成產(chǎn)物的物相結(jié)構(gòu)及發(fā)光性能的影響進(jìn)行分析。結(jié)果表明：采用高分子網(wǎng)絡(luò)凝膠法可制備單一相的正交晶系空間群為C2221的LaP3O9:Eu3+晶體。LaP3O9:Eu3+樣品在紫外光的激發(fā)下發(fā)射出Eu3+的特征光，且Eu3+摻雜量直接影響著LaP3O9:Eu3+樣品的發(fā)光強(qiáng)度，但在Eu3+摻雜量高達(dá)10%時(摩爾分?jǐn)?shù))也未能觀察到濃度猝滅現(xiàn)象。合成工藝條件顯著影響著合成產(chǎn)物的發(fā)光性能，在反應(yīng)體系pH為4的條件下制備濕凝膠，并于850 ℃下煅燒6 h可獲得發(fā)光性能較優(yōu)的產(chǎn)物。
關(guān)鍵字: 高分子網(wǎng)絡(luò)凝膠法；LaP3O9:Eu3+；結(jié)構(gòu)；光學(xué)性能
（1. School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, China;
2. Key Laboratory for Functional Materials Chemistry of Guizhou Province, Guiyang 550001, China;
3. Vocational and Technical College, Guizhou Normal University, Guiyang 550001, China）
Abstract:LaP3O9:Eu3+ phosphors were synthesized by polyacrylamide gel method. The crystal structure and optical properties of the as-synthesized samples were investigated by XRD, FT-IR and FL. The influences of synthesis conditions and Eu3+ doping content on the crystal structure and optical properties of the as-prepared samples were also discussed. The results exhibit that single-phase orthorhombic structure LaP3O9:Eu3+ crystals with space group C2221 can be obtained by polyacrylamide gel method. The photoluminescence spectra show characteristic orange-red emission of Eu3+ under ultraviolet light excitation. The doping content of Eu3+ plays a key role in the emission intensities of LaP3O9:Eu3+ crystals. The concentration quenching phenomenon can not be observed even though the doping content reaches 10% (mole fraction). The results reveal that the synthesis conditions have significant influence on the optical properties of the samples. When the calcination temperature is 850 ℃, calcination time is 6 h and pH is 4, the as-prepared sample displays excellent luminescence properties.
Key words: polyacrylamide gel method; LaP3O9:Eu3+; structure; optical property
