SBIR Phase I: Doped Quantum Dots for Solid State Lighting

这个第一阶段的小企业创新研究（SBIR）研究项目将使用掺杂量子点开发新型高亮度固态发光二极管（LED）。作为白炽灯和荧光灯的高效节能替代技术，固态照明正迅速获得发展势头。然而，由于传统荧光粉和标准未掺杂量子点固有的散射、再吸收和热猝灭损耗，目前的高亮度固态器件的发光效率降低。所提出的掺杂量子点具有宽且尺寸可调谐的吸收带，尺寸和杂质可调谐的发射带，尺寸驱动的散射效应消除，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）排放的能力，类似于今天的高亮度led。这些新灯具将改善照明，为美国工业提供具有竞争力的技术，从而显著减少全球能源使用和环境污染。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，如便携式电子设备、汽车、交通信号中的照明，都将立即受益于效率的提高。led的效率和使用的提高将大大减少能源需求，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.