CAJ | 학술논문

采用水热-热解法制备了可用于实现白光LED 的Y2.96 Al5 O12∶0.04Ce3＋荧光粉，通过X射线衍射（XRD）、扫描电镜（SEM）、X射线能谱（EDS）及荧光光谱（PL）等对Y2.96 Al5O12∶0.04Ce3＋荧光粉的物相、形貌及光致发光性能进行了表征。结果表明：水热-热解法制备出了物相纯净、分散性良好的球形 Y2.96 Al5 O12∶0.04Ce3＋粉体，该荧光粉可被460 nm蓝光有效激发，发射光谱为峰值在550 nm的一宽带，且水热-热解法得到的YAG∶Ce3＋粉体发射强度优于传统高温固相法合成的YAG ：Ce3＋荧光粉；通过积分球耦合荧光光谱仪对荧光粉与蓝光芯片配合所得白光L ED的量子效率进行了测试，结果表明：水热-热解法制备的Y2.96 Al5 O12∶0.04Ce3＋荧光粉绝对量子效率为88.40％，外量子效率为78.64％，色坐标为（0.4538，0.5318），色温为3584 K ，该方法制备的Y2.96 Al5 O12∶0.04Ce3＋荧光粉稳定性及数据测定的重现性较好，是一种适用于暖白光L ED的高性能黄色荧光粉。
채용수열-열해법제비료가용우실현백광LED 적Y2.96 Al5 O12∶0.04Ce3＋형광분，통과X사선연사（XRD）、소묘전경（SEM）、X사선능보（EDS）급형광광보（PL）등대Y2.96 Al5O12∶0.04Ce3＋형광분적물상、형모급광치발광성능진행료표정。결과표명：수열-열해법제비출료물상순정、분산성량호적구형 Y2.96 Al5 O12∶0.04Ce3＋분체，해형광분가피460 nm람광유효격발，발사광보위봉치재550 nm적일관대，차수열-열해법득도적YAG∶Ce3＋분체발사강도우우전통고온고상법합성적YAG ：Ce3＋형광분；통과적분구우합형광광보의대형광분여람광심편배합소득백광L ED적양자효솔진행료측시，결과표명：수열-열해법제비적Y2.96 Al5 O12∶0.04Ce3＋형광분절대양자효솔위88.40％，외양자효솔위78.64％，색좌표위（0.4538，0.5318），색온위3584 K ，해방법제비적Y2.96 Al5 O12∶0.04Ce3＋형광분은정성급수거측정적중현성교호，시일충괄용우난백광L ED적고성능황색형광분。
Cesium ions doped yttrium aluminum garnet (Y2.96 Al5O12 ∶ 0.04Ce3+ ) phosphors for white light emitting diodes (WLED) were successfully prepared by hydrothermal-thermolysis method .The phase composition ,morphology ,and photolumi-nescent properties of the prepared powders were investigated by X-ray diffraction ,scanning electron microscopy ,energy-disper-sive X-ray spectroscopy ,and photoluminescence spectroscopy .The results indicated that the successful preparation of the pure Y2.96 Al5 O12 ∶0.04Ce3+ powders are spherical particles and have good dispersibility .The phosphors were excited by the blue light with wavelength of 460 nm ,and a broad peak at 550 nm was observed in the emission spectrum .Moreover ,the emission peak intensity of the YAG∶Ce3+ powders prepared by hydrothermal-thermolysis method was higher than that of the samples prepared by traditional high temperature solid state method .Furthermore ,the quantum efficiency of the white LED produced by the phosphors and blue chip was measured by the integrating sphere coupled fluorescence spectrometer ,and the results indicated that the absolute quantum efficiency and external quantum efficiency of Y2.96 Al5 O12 ∶0.04Ce3+ phosphors prepared by hydro-thermal-thermolysis method were 88.40% and 78.64% ,respectively ,with the color coordinates of (0.453 8 ,0.531 8) and the color temperature of 358 4 K .The prepared Y2.96 Al5 O12 ∶0.04Ce3+ phosphors exhibited excellent stability and repeatability , and acted as excellent yellow phosphors for warm white LED .