Optoelectronic Applications of Thermally Activated Delayed Fluorescence

热激活延迟荧光的光电应用

• 批准号: RGPIN-2022-03091
• 负责人: Hudson, Zachary
• 金额: $ 5.61万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 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=747919
• 关键词: Optoelectronic; Applications; Thermally; Activated; Delayed

The discovery of thermally activated delayed fluorescence (TADF) has sparked a revolution in the science and engineering of luminescent materials. These materials allow for efficient harvesting of energy in next-generation displays and light sources, and underlie the most advanced organic light-emitting diodes (OLEDs) in use today. The global OLED market reached $38.4B USD in 2021, and is expected to nearly double in the next five years as TADF technology enables cellphones, televisions, and light fixtures with more vibrant colours, longer battery lives and higher contrast. This paradigm shift led us to the question that now motivates much of our research program: Can TADF materials be used to create similarly disruptive technologies in other fields where fluorescent materials are used? This proposal aims to apply TADF technology to three key areas of fluorescent materials research. First, we will develop luminescent nanoparticles for fluorescent imaging and tracking of diseased cells. Using TADF, we will develop probes that filter out the fluorescent background signal from biological cells and tissues, giving higher-resolution images of cells and cell structures. Second, we will use TADF materials as photocatalysts, allowing us to accelerate chemical reactions using light. Unlike conventional fluorescent materials, a TADF material can store the energy from light in its electrons for longer, giving it time to pass that energy on to other molecules. In this way, the TADF material acts as a photocatalyst, and can be used to synthesize polymers, pharmaceuticals, or other advanced materials that are difficult to access by traditional means. Finally, we will investigate emerging applications of TADF materials in organic long-persistent luminescent (OLPL) and triplet-triplet annihilation upconversion (TTA-UC) materials. OLPL materials store energy and emit light over minutes to hours, and may offer a replacement to conventional inorganic glow-in-the-dark compounds that require rare earth elements and high fabrication temperatures. TTA-UC materials can convert low-energy absorbed light into high-energy fluorescence, ideal for biological applications where red absorbed light can be used to penetrate tissues, and blue emitted light can be used for therapy. Overall, this proposal aims to unlock the potential of TADF materials in applications beyond OLEDs, creating disruptive technologies from light-emitting materials.

热激活的延迟荧光（TADF）的发现引发了发光材料的科学和工程革命。这些材料可以在下一代展示和光源中有效收集能量，并构成当今使用的最先进的有机发光二极管（OLEDS）。全球OLED市场在2021年达到38.4B美元，预计在未来五年内，TADF Technology启用了手机，电视和灯具，其颜色更具鲜艳，电池寿命更长，并且对比度更高。这种范式的转变使我们提出了一个问题，该问题现在激发了我们的大部分研究计划：可以使用TADF材料在使用荧光材料的其他领域中创建类似的破坏性技术？该建议旨在将TADF技术应用于荧光材料研究的三个关键领域。首先，我们将开发发光的纳米颗粒，用于荧光成像和病患细胞的跟踪。使用TADF，我们将开发探针，从生物细胞和组织中滤除荧光背景信号，从而为细胞和细胞结构提供更高分辨率的图像。其次，我们将使用TADF材料作为光催化剂，使我们能够使用光加速化学反应。与传统的荧光材料不同，TADF材料可以将其从电子中的光存储更长的时间，从而使该能量传递到其他分子。通过这种方式，TADF材料充当光催化剂，可用于合成传统手段难以获取的聚合物，药品或其他高级材料。最后，我们将调查TADF材料在有机长度发光（OLPL）和三重式歼灭上转换（TTA-UC）材料中的新兴应用。 OLPL材料将能量储存并发出在数分钟到几个小时的时间内，并且可能会替代传统的无机发光，以稀有地球元素和高制造温度。 TTA-UC材料可以将低能吸收的光转换为高能荧光，非常适合可用于穿透红色的光线渗透组织的生物学应用，蓝色发射光可用于治疗。总体而言，该建议旨在释放TADF材料在OLED以外的应用中的潜力，从而从发光材料中产生破坏性的技术。