SBIR Phase I: Cadmium-free nanocrystals based light emitting diodes for full color flat panel displays

SBIR 第一阶段：用于全彩平板显示器的无镉纳米晶体发光二极管

• 批准号: 1013549
• 负责人: Yunjun Wang
• 金额: --
• 依托单位: Mesolight LLC
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-07-01 至 2011-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1013549&HistoricalAwards=false
• 关键词: SBIR; Phase; Cadmium; free; nanocrystals

This Small Business Innovation Research Phase I project will develop cadmium (Cd)-free semiconductor nanocrystal (quantum dot)-polymer nanocomposite light emitting diodes (LEDs) that are compact and lightweight and have superior imaging performance and long lifetimes. Polymeric LEDs (PLEDs) provide these advantages, and also feature the advantage of cost-effective solution processability; as a result, PLEDs are expected to replace liquid crystal displays (LCDs) and cathode ray tubes (CRTs) in many existing applications. In addition, these devices have the potential to enable new product forms and applications. However, current PLED technology has some disadvantages, including limited emitting colors, broad and red-tailed emission peaks, low efficiency, and short lifetimes. The proposed Cd-free QD based PLEDs promise to increase the number of colors (by 54% over the NTSC standard color gamut), allowing high color diversity and accuracy for the viewer. This Phase I effort will focus on the development of ultraviolet/blue emitting PLEDs. The follow-on Phase II project will focus on developing full-color devices with the performance to meet the standards necessary for commercial display devices and lighting products. The broader impact/commercial potential of this project will be to enable more extensive use of PLEDs in various electronic devices and replace less-efficient LCDs, which convert only 10% of the input energy into light. The fabrication of LCD displays is also a high-cost and energy consuming process. Replacing LCDs with PLEDs produced at a lower cost will reduce energy consumption and greenhouse gas emissions. Due to their superior features, Cd-based quantum dots (QDs) are being extensively pursued for next-generation LED applications. However, Cd is very toxic and has been linked to a number of human health problems. Meanwhile, production, manipulation, and waste treatment of Cd materials is expensive and can be deleterious to the environment due to the toxicity of Cd-containing materials. The success of this project will benefit society by eliminating the use of Cd-based QDs in LED applications, leading to improved human health and reducing environmental pollution.

这个小型企业创新研究第一期项目将开发无镉(Cd)半导体纳米晶(量子点)-聚合物纳米复合发光二极管(LED)，这种发光二极管紧凑轻巧，具有优越的成像性能和长寿命。聚合物发光二极管(PLED)提供了这些优点，同时还具有溶液可加工性低的优势；因此，在许多现有的应用中，PLED有望取代液晶显示器(LCD)和阴极射线管(CRT)。此外，这些设备有可能实现新的产品形式和应用。然而，目前的PLED技术存在发光颜色有限、发射峰宽且呈红尾、效率低、寿命短等缺点。拟议的基于无CD QD的PLED承诺增加颜色的数量(比NTSC标准色域增加54%)，为观众提供高度的颜色多样性和准确性。这一第一阶段的工作将侧重于开发发射紫外线/蓝色的PLEDs。后续的第二阶段项目将专注于开发性能达到商业显示设备和照明产品所需标准的全彩色设备。该项目更广泛的影响/商业潜力将是使PLED在各种电子设备中得到更广泛的使用，并取代效率较低的LCD，后者仅将输入能量的10%转换为光。LCD显示器的制造也是一个高成本和高能耗的过程。用以较低成本生产的PLED取代LCD将减少能源消耗和温室气体排放。由于其优越的特性，基于Cd的量子点(QD)正被广泛应用于下一代LED应用。然而，镉具有很强的毒性，并与许多人类健康问题有关。同时，由于含Cd材料的毒性，Cd材料的生产、操作和废物处理都是昂贵的，并且可能对环境有害。该项目的成功将通过在LED应用中消除使用基于CD的量子点来造福社会，从而改善人类健康并减少环境污染。