激光与光电子学进展, 2014, 51 (5): 052302, 网络出版: 2015-06-03
Ce:Y3Al5O12透明陶瓷在白光LED中的应用研究 下载: 973次
Study of Ce:Y3Al5O12 Transparent Ceramics for Application of White Light Emiting Diode
材料 Ce:Y3Al5O12透明陶瓷 白光LED 流明效率 器件 materials Ce:Y3Al5O12transparent ceramics white LED luminous efficiency devices
摘要
采用固相反应法、真空烧结制备了高光学质量的Ce:YAG (Ce:Y3Al5O12) 透明陶瓷,在可见光区的透射率大于80%。分别研究了不同Ce3+掺杂浓度(原子数分数分别为0.1%、0.3%、0.5%、1.0%)和不同厚度(0.5、1.0、2.0 mm)的Ce:YAG 陶瓷的流明效率,显色指数和色温等白光发光二极管(LED)性能,采用Ce:YAG 陶瓷和商业树脂进行LED 器件封装,获得了131.5 lm/W 的光效。结果表明,Ce:YAG 透明荧光陶瓷有望成为适合大功率LED 器件的荧光材料。
Abstract
Ce:Y3Al5O12 transparent ceramics are fabricated by solid state reaction method through vacuum sintering. The in line transmittance in visible light region is higher than 80% . Different doping concentrations (atomic fraction of 0.1%, 0.3%, 0.5%, 1.0%) and thicknesses (0.5, 1.0, 2.0 mm) are investigated by considering their luninous efficiencies, color rendering index and color temperatures. After being packaged with GaN chip using commercil resin, the prime luninous efficiency reaches to 131.5 lm/W. It is proved that Ce:Y3Al5O12 transparent ceramics will be a promising phosphor prior to powder phophors in white LED devices.
石云, 吴乐翔, 胡辰, 刘书萍, 李伟, 寇华敏, 曾燕萍, 潘裕柏, 冯锡淇, 刘茜. Ce:Y3Al5O12透明陶瓷在白光LED中的应用研究[J]. 激光与光电子学进展, 2014, 51(5): 052302. Shi Yun, Wu Lexiang, Hu Chen, Liu Shuping, Li Wei, Kou Huamin, Zeng Yanping, Pan Yubai, Feng Xiqi, Liu Qian. Study of Ce:Y3Al5O12 Transparent Ceramics for Application of White Light Emiting Diode[J]. Laser & Optoelectronics Progress, 2014, 51(5): 052302.