内外相结构的粉浆法制备白光LED  

Research on the multiphase structure conformal-coating technology of power white LEDs

作　　者：俱剑君[1] 饶海波[1] 何远[1] 胡玥[1] 申发华[1] 高寒松[1] 万远涛[1] 

机构地区：[1]电子科技大学光电信息学院,四川成都610054

出　　处：《光电子．激光》2009年第9期1141-1144,共4页Journal of Optoelectronics·Laser

基　　金：国家"863"计划资助项目(2006AA03A116);四川省应用基础研究资助项目(2008JY0051)

摘　　要：为了获得白光LED芯片表面上优质性能的荧光粉层,提出一种内外相结构的粉浆法。基于水溶性感光胶的平面涂层技术,采用四氢呋喃将硅胶均匀分散后,通过有机硅消泡剂乳化形成以聚乙烯醇(PVA)为外相,以憎水性粘合剂硅胶为内相的乳液。实验结果表明,这种粉浆具备硅胶的优良特性,提高了荧光粉层的物化性能,显影后在芯片表面得到均匀且厚度可控的平面涂层,改善了白光的均匀性,提高了芯片的出光效率。In order to coat the high quality yellow phosphor layer on a GaN chip,a novel structure slurry method based on water soluble PVA is introduced.The phosphor emulsion consists of polyvinyl alcohol(PVA),silicone,phosphor,surfactants tetrahydrofuran and ammonium dichromate(ADC).Firstly,silicone is dispersed within the tetrahydrofuran,and then it is mixed with the surfactant and PVA,the eventually multiphase structure emulsion is gained.In the emulsion,PVA that is considered as the external phase encases silicon...

关 键 词：白光LED 聚乙烯醇(PVA) 重铬酸铵(ADC) 四氢呋喃 硅胶 内外相 

分 类 号：TN312.8[电子电信—物理电子学]