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, EdwardEH
• 金额: $ 11.56万
• 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: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=751725
• 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.

显示技术已经在从手表到厨房电器的设备中变得普遍。溶液处理的发光二极管（LED）有望降低成本并提高显示技术的色纯度和清晰度。然而，蓝色溶液处理的LED在操作稳定性、颜色纯度和效率方面落后于其同行。LED在显示技术中的普及值得研究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。钙钛矿是一类新型材料，已在高效发光和光致发光中得到应用。这些材料使得在绿色和红色中的功率转换效率和窄发射线宽（影响显示颜色纯度）方面取得了惊人的进步。然而，蓝色钙钛矿LED在效率和操作稳定性方面落后。在这个项目中，我们将确定具有高性能，稳定，窄线宽，低成本蓝光发射参数的材料。我们将使用计算化学方法来通知这些材料的合成。我们将对这些材料的发光颜色、线宽和效率以及稳定性进行表征。然后，我们将设计利用这些材料的蓝光发射能力的LED。拟议的研究和开发将最终展示高效，窄线宽和稳定的蓝色LED。该项目是UofT和华为加拿大公司（一家电信和移动的设备公司）之间的合作项目。UofT学员将与华为加拿大的同事密切合作，实现项目的目标，同时获得商业环境中先进研发的经验。