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.

这个小型企业创新研究（SBIR）第一阶段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。 用于彩色显示器（电视、手机、计算机、虚拟现实、手表等）OLED在能源使用、显示色彩空间、视角等方面上级所有现有技术。对于照明，OLED灯具使用的能量非常低，光线柔和，不投射阴影，并且在架构上灵活。 OLED是未来的显示和照明技术。 然而，成本和短的器件寿命阻碍了商业化的进展。 引入一种全新的OLED制造材料将实现这一进步。拟议的项目将通过利用一类新的光电材料用于构成OLED的纳米厚层来降低OLED成本并提高性能。 OLED层利用单组分小分子用于电荷传输和发光层。 这些分子倾向于结晶并且是发光分子的不良溶剂，导致发光效率降低和器件寿命缩短。 创新是使用设计的分子的异构混合物，这些分子在所有三层中都是无定形和不可结晶的。 这些分子经过化学设计，可满足上级OLED性能所需的所有光物理和电气特性。 初步的器件制造和测试已经证实，这些新材料大大提高了标准发射体分子的发射效率和器件寿命。 由于发射层中电荷复合的物理特性，只有一种技术有可能将100%的注入电荷作为发射光收集：热激活延迟荧光（TADF）。 使用TADF技术的OLED已经显示出高效率，但是具有非常短的器件寿命。 该项目将把新的非结晶技术与TADF结合起来，设计和制造具有高效率和长寿命的OLED器件，以满足商业化要求。该奖项反映了NSF的法定使命，并通过使用该基金会的知识产权进行评估，被认为值得支持。优点和更广泛的影响审查标准。