Connecting Junction Molecular Orientation to Excited State Structure and Dynamics in Organic Devices

将结分子取向与有机器件中的激发态结构和动力学联系起来

• 批准号: 1905790
• 负责人: Brian Collins
• 金额: $ 47.97万
• 依托单位: Washington State University
• 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: 2019-07-01 至 2022-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1905790&HistoricalAwards=false
• 关键词: Connecting; Junction; Molecular; Orientation; Excited

Printable electronic devices based on flexible organic-based materials have the potential to revolutionize how we renewably harvest and store energy. The arrangement of plastic molecules at interfaces between layers can determine whether the device performs well. However, there is currently limited knowledge of how such arrangements govern device performance. In this project, solar cells and light emitters printed from plastic inks are studied. These devices have important interfaces where power is generated and light is emitted. This project involves varying the arrangement of the molecules at these interfaces, monitored by powerful X-ray techniques. Correspondingly, power- and light-generating processes are measured and related to the arrangement of the molecules. The result will be a new capability to tailor molecule arrangements at interfaces to maximize device performance. Such a capability will enable flexible and printable technologies to dramatically reduce the cost of energy. Students involved in this project will take part in the Science Ambassadors Program by developing a plastic solar cell lab for high school students. This activity will demonstrate both the fundamental science and the potential of these technologies. The interdisciplinary and collaborative nature of the project will provide the students with expertise to communicate diverse viewpoints that will be required of the next generation of scientists.Optoelectronic properties in printable organic devices could be tailored for revolutionary applications through simple processing techniques that engineer interfacial structures, but there is a gap in knowledge to realize this goal. This gap is due to the difficulty in quantitatively resolving buried organic interfacial nanostructure and directly correlating this to fundamental device processes. In the proposed work, a suite of recently developed resonant X-ray nanoprobes will be used to quantify molecular orientation, aggregation, and mixing local to buried organic interfaces. These measurements will be combined with advanced studies of excited state structure and dynamics on the exact same device - eliminating uncertainties related to sample variability. The objective is to define quantitative relationships on how molecular ordering at buried organic junctions controls excited state dynamics connected to performance. It will be accomplished by systematically investigating all structural cases in planar junctions and extending this information to printed 3D heterojunctions. Our aim is not only to establish the general concepts, but to define the functional form of these relationships to enable designed properties in high-performing organic devices.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.

基于柔性有机材料的可打印电子设备有可能彻底改变我们可再生能源的收集和储存方式。塑料分子在层与层之间的界面上的排列可以决定设备是否表现良好。然而，目前对这种安排如何管理设备性能的知识有限。在这个项目中，研究了用塑料油墨印刷的太阳能电池和光发射器。这些器件具有重要的接口，在这些接口处产生电力并发射光。该项目涉及改变这些界面上分子的排列，并通过强大的X射线技术进行监测。相应地，功率和光产生过程被测量并与分子的排列相关。其结果将是一种新的能力，在界面上定制分子排列，以最大限度地提高器件性能。这种能力将使灵活和可打印的技术能够大大降低能源成本。参与该项目的学生将参加科学大使计划，为高中生开发一个塑料太阳能电池实验室。这项活动将展示基础科学和这些技术的潜力。该项目的跨学科和协作性质将为学生提供专业知识，以交流下一代科学家所需的各种观点。通过设计界面结构的简单加工技术，可打印有机器件的光电特性可以为革命性应用量身定制，但实现这一目标的知识存在差距。这一差距是由于难以定量解析掩埋的有机界面纳米结构，并将其与基本器件工艺直接相关。在拟议的工作中，一套最近开发的共振X射线纳米探针将用于量化分子取向，聚集和混合本地掩埋的有机界面。这些测量将与激发态结构和动力学的高级研究相结合，在完全相同的设备上-消除与样品变异性有关的不确定性。我们的目标是定义如何在掩埋的有机结控制激发态动力学连接到性能的分子排序的定量关系。它将通过系统地研究平面结中的所有结构情况并将此信息扩展到打印的3D异质结来完成。我们的目标不仅是建立一般的概念，但定义这些关系的功能形式，使设计的性能在高性能的有机器件。这个奖项反映了NSF的法定使命，并已被认为是值得通过评估使用基金会的智力价值和更广泛的影响审查标准的支持。

项目成果

Electrical edge effect induced photocurrent overestimation in low-light organic photovoltaics

低光有机光伏中电边缘效应引起的光电流高估

• DOI: 10.1016/j.joule.2022.06.008
• 发表时间: 2022
• 期刊: Joule
• 影响因子: 39.8
• 作者: Xiaobo Zhou;Chao Zhao;Awwad Nasser Alotaibi;Hongbo Wu;Hafiz Bilal Naveed;Baojun Lin;Ke Zhou;Zaifei Ma;Brian A. Collins;Wei Ma
• 通讯作者: Wei Ma

Solvent‐Induced Polymorphism in Non‐Fullerene‐Based Organic Solar Cells

非富勒烯有机太阳能电池中溶剂诱导的多晶型现象

• DOI: 10.1002/solr.202200819
• 发表时间: 2022
• 期刊: Solar RRL
• 影响因子: 7.9
• 作者: Xin, Jingming;Zhao, Heng;Xue, Jingwei;Seibt, Susanne;Collins, Brian A.;Ma, Wei
• 通讯作者: Ma, Wei

Pressure-assisted thermal sterilization of avocado puree in high barrier polymeric packaging

• DOI: 10.1016/j.lwt.2021.112960
• 发表时间: 2021-12-17
• 期刊: LWT-FOOD SCIENCE AND TECHNOLOGY
• 影响因子: 6
• 作者: Al-Ghamdi, Saleh;Sonar, Chandrashekhar R.;Sablani, Shyam S.
• 通讯作者: Sablani, Shyam S.

Evidence for Field-Dependent Charge Separation Caused by Mixed Phases in Polymer–Fullerene Organic Solar Cells

聚合物富勒烯有机太阳能电池中混合相引起场相关电荷分离的证据

• DOI: 10.1021/acs.jpclett.0c03863
• 发表时间: 2021
• 期刊: The Journal of Physical Chemistry Letters
• 作者: Dhakal, Prabodh;Ferron, Thomas;Alotaibi, Awwad;Murcia, Victor;Alqahtani, Obaid;Collins, Brian A.
• 通讯作者: Collins, Brian A.

On the Interplay between CT and Singlet Exciton Emission in Organic Solar Cells with Small Driving Force and Its Impact on Voltage Loss

• DOI: 10.1002/aenm.202200641
• 发表时间: 2022-06-28
• 期刊: ADVANCED ENERGY MATERIALS
• 影响因子: 27.8
• 作者: Fritsch, Tobias;Kurpiers, Jona;Neher, Dieter
• 通讯作者: Neher, Dieter