SBIR Phase II: Titania-Loaded Silicone with High Refractive Index for Light-Emitting Diode Encapsulation

该小型企业创新研究（SBIR）第二阶段项目致力于开发一类新材料，即具有非常高折射率的聚合物纳米材料，其折射率将与无机半导体的折射率密切匹配。封装材料由二氧化钛纳米颗粒负载的有机硅和环氧树脂组成。二氧化钛（TiO 2）具有2.68的折射率，并且TiO 2与聚合物的混合物将导致折射率的增加。通过适当使用表面活性剂和采用厚度小于散射事件之间的平均距离的薄膜的封装结构，将克服过度光学散射的公知问题。如果成功的话，新的高折射率密封剂的开发将对SSL技术产生巨大的影响，因为几乎所有由无机半导体制成的SSL器件都是封装和密封的。该计划的成功完成将导致全球光电器件封装和封装的范式转变。在普通照明应用中广泛部署高效LED技术也将导致仅在美国每年节省TWh范围内的电能。

This Small Business Innovation Research (SBIR) Phase II project addresses the development of a new class of materials, namely polymeric nanomaterials with a very high refractive index, which will closely match the refractive index of inorganic semiconductors. The encapsulant materials consist of titania-nanoparticle-loaded silicone and epoxy. Titania (TiO2) has a refractive index of 2.68 and the admixture of TiO2 with a polymer would result in an increase of the refractive index. The well-known problem of excessive optical scattering will be overcome by proper use of surfactants and an encapsulation structure that employs thin films, with a thickness that is less than the average distance between scattering events. If successful the development of a new high-index encapsulant will have a tremendous impact on SSL technology because virtually all SSL devices made of inorganic semiconductors are packaged and encapsulated. A successful completion of the program will result in a worldwide paradigmatic shift in the packaging and encapsulation of optoelectronic devices. The broad deployment of efficient LED technology for general lighting applications would also result in electrical energy savings in the TWh range per year within the United States alone.