SBIR Phase I: Non-crystallizable charge transporting organic materials as OLED functional layers and thermally activated delayed fluorescence emitter-layer hosts

SBIR 第一阶段：作为 OLED 功能层和热激活延迟荧光发射体层主体的非结晶电荷传输有机材料

• 批准号: 1843233
• 负责人: David Weiss
• 金额: $ 22.5万
• 依托单位: Molecular Glasses, Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-02-01 至 2020-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1843233&HistoricalAwards=false
• 关键词: SBIR; Phase; Non; crystallizable; charge

The broader impact/commercial potential of this Small Business Innovation Research (SBIR) Phase I project is to accelerate the commercialization of organic light-emitting diode (OLED) technology. For color displays (TV, cell phone, computer, virtual reality, watches, etc.) OLED is superior to all existing technologies in terms of energy usage, display color space, viewing angle, etc. For lighting, OLED fixtures use very low energy, the light is soft, casts no shadow, and is architecturally flexible. OLED is the display and lighting technology of the future. However cost and short device lifetime has retarded commercial advancement. The introduction of an entirely new class of materials for OLED manufacturing will enable this advancement. The proposed project will reduce OLED cost and improve performance by utilizing a new class of photoelectric materials for the nanometer thick layers that comprise an OLED. OLED layers utilize single-component small molecules for the charge transporting and light-emitting layers. These molecules tend to crystallize and are poor solvents for the emitting molecules leading to decreased light emission efficiency and shortened device lifetime. The innovation is using isomeric mixtures of designed molecules that are amorphous and non-crystallizable in all three layers. These molecules are chemically designed to meet all the required photophysical and electrical characteristics necessary for superior OLED performance. Preliminary device fabrication and testing has confirmed that these new materials dramatically improve both emission efficiency and device lifetime with the standard emitter molecules. Due to the physics of charge recombination in the emitter layer there is only one technology which has the potential to harvest 100% of the injected charge as emitted light: thermally activated delayed fluorescence (TADF). OLEDs using TADF technology have demonstrated high efficiency but with very short device lifetime. This project will couple the new non-crystallizable technology with TADF to design and fabricate OLED devices with both high efficiency and long life to meet commercialization requirements.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这项小型企业创新研究（SBIR）I期项目的更广泛的影响/商业潜力是加速有机发光二极管（OLED）技术的商业化。 对于颜色显示器（电视，手机，计算机，虚拟现实，手表等），OLED在能源使用情况下，显示颜色空间，观看角度等方面优于所有现有技术。对于照明，OLED固定装置使用非常低的能量，光线柔软，没有阴影，并且具有建筑柔性。 OLED是未来的显示和照明技术。 然而，成本和短期设备寿命延伸了商业进步。 引入了全新的OLED制造材料类，将实现这一进步。拟议的项目将通过利用构成OLED的纳米厚层的新型光电材料来降低OLED成本并提高性能。 OLED层利用单组分小分子进行电荷运输和发光层。 这些分子倾向于结晶，并且是发射分子的溶剂差，导致光发射效率降低并缩短了装置寿命。 该创新使用的是设计分子的异构混合物，这些分子在所有三层中都是无定形和不可结合的。 这些分子是化学设计的，旨在满足出色性能所需的所有所需的光物理和电气特性。 初步的装置制造和测试已经证实，这些新材料通过标准发射极分子显着提高了发射效率和设备寿命。 由于发射极层中电荷重组的物理重组，只有一项技术有可能收获100％作为发射光的注射电荷：热激活的延迟荧光（TADF）。 使用TADF技术的OLED表现出很高的效率，但设备寿命非常短。 该项目将将新的非结晶技术与TADF融为一体，以高效且寿命长以满足商业化要求的设计和制造OLED设备。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛的审查标准通过评估来进行评估的。