Stable and efficient blue light-emitting diodes

稳定高效的蓝色发光二极管

• 批准号: 537463-2018
• 负责人: Sargent, Edward
• 金额: $ 33.8万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=699313
• 关键词: Stable; efficient; blue; light; emitting

Display technologies have become prevalent in devices from watches to kitchen appliances. Solution-processed light-emitting diodes (LEDs) promise to reduce costs and increase the colour purity and sharpness of display technologies. However, the blue solution-processed LED has lagged behind its counterparts in operational stability, color purity, and efficiency. The pervasiveness of LEDs in display technologies warrants investigations to improve power conversion efficiency (to decrease energy consumption), increase color purity and sharpness, reduce material costs, and increase long-term operational stability. Perovskites are a new class of materials that have found applications in efficient light emission and photovoltaics. These materials have enabled striking advances in power conversion efficiency and narrow emission linewidths (affecting display color purity) in the green and red. Blue perovskite LEDs, however are behind in efficiency and operational stability. In this project, we will identify materials with parameters that enable high performance, stable, narrow linewidth, low-cost blue emission. We will use computational chemistry methods to inform the synthesis of these materials. We will characterize these materials for emission color, linewidth and efficiency, and stability. We will then design LEDs that harness these materials' blue-emitting capability. The proposed research and development will culminate in the demonstration of efficient, narrow-linewidth, and stable blue LEDs. This project is a partnership between UofT and Huawei Canada, a telecommunications and mobile devices company. UofT trainees will work closely with their colleagues at Huawei Canada to realize the goals of the project while gaining experience in advanced R&D in a commercial setting.

从手表到厨房电器的设备中，展示技术已经普遍存在。解决方案处理的发光二极管（LED）有望降低成本并提高显示技术的颜色纯度和清晰度。但是，蓝色解决方案所处理的LED在其操作稳定性，颜色纯度和效率方面落后于其对应物。展示技术中LED的普遍性值得调查，以提高功率转换效率（以降低能耗），提高颜色纯度和清晰度，降低材料成本并提高长期操作稳定性。 Perovskites是一类新的材料，在有效的光发射和光伏中发现了应用。这些材料使绿色和红色的功率转换效率和狭窄的发射线宽（影响显示颜色纯度）的巨大进步。蓝色钙钛矿LED却落后于效率和操作稳定性。在这个项目中，我们将识别具有能够使高性能，稳定，狭窄的线宽，低成本蓝色发射的参数的材料。我们将使用计算化学方法来告知这些材料的合成。我们将表征这些材料的发射颜色，线宽和效率以及稳定性。然后，我们将设计利用这些材料的蓝色发射能力的LED。拟议的研发将在表现出高效，狭窄的宽度和稳定的蓝色LED时达到顶峰。 该项目是Uoft和华为加拿大的合作伙伴关系，这是电信公司和移动设备公司。 Uoft学员将与加拿大华为的同事紧密合作，以实现该项目的目标，同时在商业环境中获得高级研发的经验。