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稀土发光材料在固体白光LED照明中的应用 王静1,张梅1,张新民1,郭崇峰1,吴昊1,张剑辉1,徐剑1,苏锵1,潘跃晓1 (1.中山大学化学与化工学院,光电材料与技术国家重点实验室,广东,广州,510275;2.中国科学院长春应用化学研究所,稀土化学与物理重点实验室,吉林,长春,130022) 摘要:固体白光发光二极管将成为21世纪新一代的节能光源. 要实现白光发射的重要途径之一是利用稀土发光材料的荧光转换技术, 把InGaN半导体管芯发射的460 nm蓝光或400 nm近紫外光转换成白光. 分别就这两种管芯报道了我们研制的发射蓝,绿,黄,红等不同颜色的稀土发光材料: YAG:Ce, Ca1-xSrxS:Eu2+, Ga2S3:Eu2+, MGa2S4:Eu2+(M=Ca, Sr, Ba), SrGa2+xS4+y:Eu2+, (Ca1-xSrx)Se:Eu2......
白色发光二极管用蓝色荧光粉的研究进展 侯万国1,吴占超1,刘杰2 (1.青岛科技大学化学与分子工程学院,青岛,266042;2.青岛科技大学化工学院,青岛,266042) 摘要:白色发光二极管(WLED)被称为第四代照明光源,应用前景十分广阔.概速了目前国内外WLED用蓝色荧光粉的研究进展,介绍了WLED用蓝色荧光粉的基质材料,制备方法,发光中心和掺杂离子等对WLED用蓝色荧光粉发光性能的影响,展望了该类荧光材料的发展研究趋势和应用前景. 关键词:白光LED; 蓝色荧光粉; 发射光谱; white light-emitting diodes; blue phosphor; emission spectra; [全文内容正在添加中] ......
+-activated glass ceramics precipitated with green and red phosphors for high-power white LED[J]. IEEE Journal on Selected Topics in Quantum Electronics, 2009, 15(4): 1171-1176. [6] 宋国华, 缪建文, 徐淑武, 纪宪明. YAG:Ce3+玻璃陶瓷白光LED的发光特性[J]. 光电子·激光, 2010, 21(12): 1785-1789. SONG Guo-hua, MIOU Jian-wen, XU Shu-wu, JI Xian-ming. Photoluminescence properties of the Ce3+-doped yttrium aluminum garnet glass-ceramic white......
单基质白光LED荧光粉研究进展曹逊,曹翠翠,孙光耀,金平实中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室摘 要:白光LEDs(White Light-Emitting Diodes, WLEDs)作为一种新型的固体照明光源,相对于已有光源(白炽灯,荧光灯等)具有发光效率高,响应速度快,寿命长等优势,在照明和显示领域有着广阔的应用前景.目前获取WLEDs最常用的方法是蓝光LED芯片激发YAG:Ce3+黄光荧光粉以及紫外-近紫外芯片激发三基色荧光粉(RGB混合荧光粉),相比于以上两种方式,单基质WLEDs荧光粉由于能克服传统RGB荧光粉颜色再吸收及配比调控的问题,获得较高的流明效率及较高色彩还原性而受到越来越多的关注.目前关于单基质白光荧光的研究已有大量文献报道,涉及多种材料体系,按照发光原......
Optimal and suboptimal white noise smoothers for nonlinear stochastic systemsWANG Xiao-xu(王小旭), PAN Quan(潘泉), LIANG Yan(梁彦), CHENG Yong-mei(程咏梅)(College of Automation, Northwestern Polytechnical University, Xi’an 710072, China)Abstract:A new approach of smoothing the white noise for nonlinear stochastic system was proposed. Through presenting the Gaussian approximation about the white noise......
of white LEDs via blue LED chips.Their excitation bands at 452,476 and 487 nm were attributed to transitions of 3H4→3P2,3H4→3P1+1I6,3H4→3P0 of Pr3+ ion.The red emissions at 606 and 610 nm were...Pr3+-doped Li2SrSiO4 red phosphor for white LEDs饶阳,胡小野,刘涛,周新木,周雪珍,李永绣Research Center for Rare Earths&Nano/micro Functional Materials,Institute of Advanced Study,Nanchang University摘 要:
of white LEDs via blue LED chips.Their excitation bands at 452,476 and 487 nm were attributed to transitions of 3H4→3P2,3H4→3P1+1I6,3H4→3P0 of Pr3+ ion.The red emissions at 606 and 610 nm were...Pr3+-doped Li2SrSiO4 red phosphor for white LEDs饶阳,胡小野,刘涛,周新木,周雪珍,李永绣Research Center for Rare Earths&Nano/micro Functional Materials,Institute of Advanced Study,Nanchang University摘 要:
to synthesize the Eu2+ activated Ca-α-SiAlON phosphors containing low oxygen content. The luminescence properties of the obtained products were investigated for white LEDs application. The critical Eu2+ concentration in various hosts and its effect on the photoluminescence properties were studied. The optimized sample (10at.% Eu2+ vs. Ca2+) could be efficiently excited by the current GaN/InGaN blue LED......
