摘要
用共沉淀法制得的Y3Al5O12(YAG)∶Ce3+前驱体,混和H3BO3-SiO2-Al2O3-Na2CO3玻璃初始材料,经过1300℃3h煅烧,得到用于白光LED封装的硼铝硅酸盐YAG玻璃陶瓷。用差热分析(DTA)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)和光致发光(PL)等分析方法对产物进行表征。研究发现Al2O3和YAG∶Ce3+前驱体含量对YAG玻璃陶瓷激发和发射光谱强度有重要影响。结果表明,玻璃陶瓷中晶体为10μm左右的YAG,其激发和发射光谱与标准YAG荧光粉光谱一致。当Al2O3和YAG∶Ce3+前驱体含量分别为初始混合材料质量的11.5%和34.6%时,玻璃陶瓷荧光强度达到最大值。用本文制备的硼铝硅酸盐YAG玻璃陶瓷封装成白光LED,在350mA驱动电流下,色坐标为(0.2934,0.3094),相关色温为8020K,显色指数为75.2。
Employing a simple co-precipitation method, Y3Al5O12（YAG）∶Ce^3＋ aluminoborosilicate glass-ceramic phosphors for white LED have been successfully synthesized by mixing phosphor precursor with H3BO3-SiO2-Al2O3-Na2CO3 glass powder through calcining at 1 300 ℃ for 3 hours. The as-prepared YAG glass-ceramic phosphor were investigated by DTA, XRD, SEM, and PL. It was found the contents of Al2O3 and YAG∶Ce^3＋ raw material have great effect on the excitation and emission spectra intensity of glass-ceramic phosphors. The results showed that the grains in glass-ceramic phosphor are YAG crystals with the size of 10 μm and the excitation and emission spectra of YAG glass-ceramic are consistent with the known YAG phosphor. The fluorescent intensity reaches the maximum, when the Al2O3 and YAG ∶Ce^3＋ precursor contents were 11.5% and 34.6% , respectively. Under 350 mA forward-bias current, the chromaticity coordinates （CIE）, correlated color temperature, and the CRI were x=0.293 4, y=0.309 4, 8 020 K, and 75.2, respectively, the white LEDs were made by packaging YAG aluminoborosilicate glass-ceramic.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2010年第11期1975-1980,共6页
Chinese Journal of Inorganic Chemistry
基金
江苏省自然科学基金(No.BK2008183)
教育部留学回国人员科研启动基金(教外司留[2009]8号)
江苏省高校自然科学基金(No.08KJB430012)资助项目
