SBIR Phase I: Doped Quantum Dots for Solid State Lighting

这个第一阶段的小型企业创新研究(SBIR)研究项目将开发使用掺杂量子点的新型高亮度固态发光二极管(LED)。固态照明作为白炽灯和最终荧光灯的一种高能效替代技术，正在迅速获得发展势头。然而，目前的高亮度固态器件由于传统荧光粉和标准非掺杂量子点固有的散射、重吸收和热猝灭损耗而降低了发光效率。所提出的掺杂量子点具有宽的和尺寸可调的吸收带，尺寸和杂质可调的发射带，尺寸驱动的散射效应的消除，以及吸收和发射带之间的明显分离。此外，它们还显示出在高温下保持高效(甚至改进)发射的能力，类似于今天的高亮度LED所经历的。这些新灯具将改善照明，并为美国工业提供具有竞争力的技术，这些技术将显著减少全球能源消耗和环境污染。该技术适用于使用荧光颜色转换层的所有LED光源。因此，任何当前的应用，如便携式电子产品、汽车、交通信号中的照明，都将立即受益于效率的提高。LED效率的提高和使用将显著降低能源需求，降低污染水平，减少有毒废物(例如荧光灯产生的汞)，并减少对外国石油供应商的依赖。

This Phase I Small Business Innovation Research (SBIR) research project will develop novel high brightness solid-state Light Emitting Diodes (LED) using doped quantum dots. Solid state lighting is rapidly gaining momentum as a highly energy efficient replacement technology for incandescent and eventually fluorescent lighting. However, current high brightness solid state devices suffer from reduced luminous efficiencies due to scattering, re-absorption, and thermal quenching losses inherent in conventional phosphors and standard undoped quantum dots. The proposed doped quantum dots have broad and size-tunable absorption bands, size and impurity tuned emission bands, size-driven elimination of scattering effects, and a distinct separation between absorption and emission bands. In addition, they also display the ability to maintain efficient (even improved) emissions at high temperatures similar to those experienced in today's high brightness LEDs. These new lamps will improve lighting and provide US industry with competitive technologies that will significantly reduce global energy use and environmental pollution. This technology has applicability to all LED light sources where a fluorescent color conversion layer is used. Thus, any current application, such as lighting in portable electronics, automobiles, traffic signaling, will immediately benefit from increased efficiency. The increased efficiency and use of LEDs will lead to significantly reduced energy requirements, lower levels of pollution, reduced toxic waste (e.g., Hg from fluorescent lamps) and a reduced dependence on foreign oil suppliers.