SBIR Phase I: High-efficiency and Stable Nanocomposite Light Emitting Diode

该小型企业创新研究(SBIR)第一阶段项目旨在开发一种用于发光二极管(LED)应用的新型明亮稳定的纳米荧光粉。聚合物LED(PLED)具有优异的成像性能、紧凑、轻巧的性能，以及多功能和低成本的溶液加工性；因此，在许多现有的应用中，聚合物LED将取代液晶显示器(LCD)和阴极射线管(CRT)，并为新的产品形式和应用开辟令人兴奋的可能性。然而，PLED具有发光颜色有限、发射峰宽且呈红尾、效率低、寿命短等缺点。在第一阶段，通过将纳米荧光粉嵌入到宽禁带磷光聚合物中来组装和测试混合PLED器件。该器件的运行将在很大程度上依赖于从主体聚合物到客体纳米磷光体的能量转移。利用SBIR项目将要开发的纳米荧光粉的高亮度和高稳定性的优势，混合PLED器件将具有低成本和高性能(即效率、寿命和颜色质量)，达到甚至超过商业化要求的标准。如果成功，对该项目成果的一些主要影响将是：(1)使PLED能够在便携式计算机、蜂窝电话、手持生物传感器和大面积显示屏等电子设备中得到更广泛的使用，(2)产生全新的显示产品，例如，可用于挡风玻璃显示器的透明LED(TITED)，飞机和汽车的平视仪器，兼作显示屏的办公窗户，(3)作为照明资源的高效白色发光二极管的制造，以取代汞基照明设备，以及(4)新型纳米荧光粉材料的产生

This Small Business Innovation Research (SBIR) Phase I project aims to develop a new type of bright and stable nanophosphors for light emitting diode (LED) applications. Polymeric LED (PLED) has the superior imaging performance, compact, lightweight properties, and versatile and cost-effective solution processability; and thus is setting to replace liquid crystal displays (LCDs) and cathode ray tubes (CRTs) in many existing applications, as well as open up exciting possibilities for new product forms and applications. However, PLED has the drawback of limited emitting colors, broad and red tailed emission peak, low efficiency, and short lifetime. In Phase I, hybrid PLED device will be assembled and tested by embedding the nanophosphors into wide band-gap phosphorescent polymer. The operation of the device will largely rely on the energy transfer from host polymer to the guest nanophosphors. Taking the advantages of the high brightness and high stability of the nanophosphors to be developed in this SBIR project, the hybrid PLED devices would have low-cost and the high performance (i.e. efficiency, lifetime, and color quality) that would meet or even exceed the standards as required for commercialization. If successful some of the major impacts for the outcome of this project will be (1) the enabling of more extensive use of PLEDs in the electronic devices such as portable computers, cellular telephone, hand-held biosensors, and large area displaying screen, (2) engendering entirely new display products, for example, the transparent LED (TLED), which could be used in windshield displays, heads-up instrumentation for aircraft and automobiles, office windows doubled as display screen, (3) fabrication of high efficiency white PLED as lighting resources to replace the mercury-based lighting devices, and (4) generation of a new type of nanophosphors materials