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.

在这个由化学结构，动力学和机制A（CSDM-A）计划资助的项目中，俄勒冈州立大学的Oksana Ostroverkhova教授正在探索一条新的途径，以改善碳基电子（有机半导体）的稳定性，当它们暴露于光线时。有机半导体由于其低成本和可调节性能而引起人们的关注。已经证明了从光伏到三维显示器的广泛应用。当暴露于常见环境因素（如光和空气）时，有机电子产品的广泛商业化受到了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膜放置在微小的微腔中，在那里与光相互作用，从而形成了混合的轻质物质状态，称为Polaritons。 Ostroverkhova教授和她的学生正在研究这些偏光子对导致有机半导体检测到的化学反应速度和结果的影响。他们使用光吸附和理论模型来研究如何使用极性子的特性来减慢有机半导体分子的降解，并在发生降解时促进自我修复。该项目将基本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。研究生和本科生在北极星化学的新兴领域以及高级光谱和数值建模技术方面获得了经验。PI对杂交光态态的性质和“黑暗状态”的性质进行了系统的投资（由于分子对cavity not covity not cavity covity not cavity sectors and sem secy photections photection and photsication andode and recesplion cousease cousease cousease cousease cousecony rypodation secousecation sectional couseption sectional sectotical sectotical secouseation。高性能有机半导体模型系统用于量化强烈的令人兴奋的光子耦合控制的光稳定性增强，这取决于非交互（“隔离”）分子的光降解途径和分子聚集体中的光降解途径，并在促进恢复的振动振动状态的可行性中，并确定了恢复循环的可行性。该项目的更广泛影响是其潜在的影响，对解决有机电子设备的稳定性瓶颈以及偏光型设备的发展以及学生培训的开发，如上所述。该奖项反映了NSF的法定任务，并通过使用基金会的知识分子和更广泛的影响来评估NSF的法定任务，并被认为是诚实的支持。

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