Strong Coupling in Microcavities for Enhancing Photostability of High-Performance Organic Semiconductors

微腔中的强耦合可增强高性能有机半导体的光稳定性

• 批准号: 1956431
• 负责人: Oksana Ostroverkhova
• 金额: $ 38.26万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1956431&HistoricalAwards=false
• 关键词: Strong; Coupling; Microcavities; Enhancing; Photostability

In this project funded by the Chemical Structure, Dynamics, and Mechanisms A (CSDM-A) program of the Chemistry Division, Professor Oksana Ostroverkhova of Oregon State University is exploring a new route for improving the stability of carbon-based electronics (organic semiconductors) when they are exposed to light. Organic semiconductors are of interest due to their low cost and tunable properties. A broad range of applications, from photovoltaics to three-dimensional displays, have been demonstrated. Wide commercialization of organic electronics has been hindered by their relatively low stability when exposed to common environmental factors such as light and air. In this project, very thin films of organic semiconductor materials are placed in tiny microcavities, where they interact with light, creating hybrid light-matter states known as polaritons. Professor Ostroverkhova and her students are studying the effects of these polaritons on the speed and outcome of chemical reactions that cause the organic semiconductors to deteriorate. They are using light-absorption and theoretical modeling to study how properties of polaritons could be used to slow down degradation of the organic semiconductor molecules and to promoting self-healing if degradation does occur. The project integrates fundamental chemistry and physics with materials design and device technologies and provides educational resources and infrastructure for students involved in the project. Graduate and undergraduate students gain experience in the emergent field of polariton chemistry, and in advanced spectroscopy and numerical modeling techniques.The PI carries out a systematic investigation of how the properties of hybrid light-matter states and of the “dark” states (due to molecules not coupled to the cavity) control the rates of chemical reactions responsible for photodegradation and recovery of organic semiconductors. High-performance organic semiconductor model systems are used to quantify strong exciton-photon coupling-controlled enhancement of photostability depending on the photodegradation pathway in non-interacting (“isolated”) molecules and in molecular aggregates and to establish the feasibility for cavity-coupled vibrational states to promote reversal of the photodegradation. The broader impact of this project is in its potential impact on resolving the stability bottleneck of organic electronic devices and on the development of polaritonic devices, as well as student training, as mentioned above.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.

在化学部化学结构、动力学和机制A（CSDM-A）项目资助的这一项目中，俄勒冈州州立大学的Oksana Ostroverkhova教授正在探索一条提高碳基电子器件（有机半导体）在暴露于光时的稳定性的新途径。 有机半导体由于其低成本和可调性质而受到关注。 从光致发光到三维显示器的广泛应用已经得到证实。 有机电子产品的广泛商业化受到其暴露于常见环境因素如光和空气时相对较低的稳定性的阻碍。 在这个项目中，有机半导体材料的非常薄的薄膜被放置在微小的微腔中，在那里它们与光相互作用，产生被称为极化激元的混合光物质状态。 Ostroverkhova教授和她的学生正在研究这些极化激元对导致有机半导体恶化的化学反应的速度和结果的影响。 他们正在使用光吸收和理论建模来研究如何利用极化激元的特性来减缓有机半导体分子的降解，并在降解发生时促进自我修复。 该项目将基础化学和物理学与材料设计和设备技术相结合，并为参与该项目的学生提供教育资源和基础设施。 研究生和本科生在极化激元化学的新兴领域获得经验，并在先进的光谱学和数值模拟技术。PI进行混合轻物质状态和“暗”状态（由于分子不耦合到腔）的属性如何控制负责有机半导体的光降解和恢复的化学反应速率的系统调查。 高性能的有机半导体模型系统被用来量化强激子-光子耦合控制的增强光稳定性依赖于在非相互作用（“隔离”）的分子和分子聚集体中的光降解途径，并建立腔耦合的振动状态，以促进逆转的光降解的可行性。 该项目的更广泛影响在于其对解决有机电子器件的稳定性瓶颈和极化激元器件的开发以及学生培训的潜在影响，如上所述。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Exciton Polariton-Enhanced Photodimerization of Functionalized Tetracene

功能化并四苯的激子极化增强光二聚化

• DOI: 10.1021/acs.jpcc.1c06881
• 发表时间: 2021
• 期刊: The Journal of Physical Chemistry C
• 作者: Puro, Richard;Van Schenck, Jonathan D.;Center, Reid;Holland, Emma K.;Anthony, John E.;Ostroverkhova, Oksana
• 通讯作者: Ostroverkhova, Oksana

Exciton Polaritons Reveal “Hidden” Populations in Functionalized Pentacene Films

激子极化子揭示功能化并五苯薄膜中的“隐藏”族群

• DOI: 10.1021/acs.jpcc.1c08257
• 发表时间: 2021
• 期刊: The Journal of Physical Chemistry C
• 作者: Van Schenck, Jonathan D.;Goldthwaite, Winston T.;Puro, Richard;Anthony, John E.;Ostroverkhova, Oksana
• 通讯作者: Ostroverkhova, Oksana